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Zhang S, Xiao Z. Pesticide loaded nanohydrogel based on attapulgite and gelatin with improved foliar adhesion. PEST MANAGEMENT SCIENCE 2024; 80:3884-3892. [PMID: 38511870 DOI: 10.1002/ps.8091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 02/27/2024] [Accepted: 03/19/2024] [Indexed: 03/22/2024]
Abstract
BACKGROUNDS Pesticides have been widely applied to promote plant growth due to their high insecticidal efficiency. However, most pesticides easily slip from the leaf surface due to the low foliar adhesion, leading to significant damage to the environment and human health. Increasing foliar adhesion of pesticides has been a major challenge. Nanomaterial technology, which can deliver pesticide active ingredients, offers a new opportunity to increase pesticides efficacy with higher foliar adhesion. RESULTS In this study, we prepared the pesticide loaded nanohydrogel ALP@Ge-g-P(AA-co-AM)/ATP by grafting attapulgite and gelatin onto P(AA-co-AM), and loading the pesticide alphacypermethrin synchronously via the emulsion solvent evaporation method. The size of the new nanohydrogel was 20.5 nm and the pesticide loading capacity was 21.5%. Compared to P(AA-co-AM), the water absorbency of Ge-g-P(AA-co-AM)/ATP increased by 54.3% in 120 min, while the water retention increased from 4.27% to 38.7% after 48 h. Washout experiments and contact angle results suggested that the nanohydrogel, with a contact angle of 44.8° indicating good wettability, can resist rain flush and increase foliar adhesion naturally. CONCLUSIONS Overall, the preparation of pesticide loaded nanohydrogel is simple. Experiments demonstrated the pesticide loaded nanohydrogel has high efficiency and strong foliar adhesion. This makes it a promising candidate for spraying application and reducing pollution levels. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Sijia Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, P. R. China
| | - Zhenggang Xiao
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, P. R. China
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2
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Subraveti SN, Peters SM, Nader MG, Burni FA, Raghavan SR. A Smart Skin for Hydrogels That Enables Switchable Solute Release. ACS APPLIED MATERIALS & INTERFACES 2024; 16:9201-9209. [PMID: 38329464 DOI: 10.1021/acsami.3c10515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Many applications of hydrogels rely on their ability to deliver encapsulated solutes, such as drugs; however, small hydrophilic solutes rapidly leak out of gels by diffusion. A need exists for a way to regulate solute release out of gels─to ensure zero release until a desired time (the OFF state) and thereafter for the release to be switched ON at a high rate. This should ideally be a repeatable switch; i.e., the gel should be cyclable repeatedly between the ON and OFF states. Such perfect, cyclical ON-OFF release of solutes from gels is demonstrated for the first time through a "smart skin" that is synthesized rapidly (in ∼10 min) around an entire gel. The thin (∼100 μm) and transparent polymer skin is endowed with redox-responsive properties through the use of urethane and acrylate monomers, one of which contains a thioether group. Initially, the skin is hydrophobic (water contact angle 102°), and it completely prevents hydrophilic solutes from leaking out of the gel. When contacted with oxidants such as hydrogen peroxide (H2O2), the thioethers are converted to sulfoxides, making the skin hydrophilic (water contact angle 42°) and thereby turning ON the release of solutes. Conversely, solute release can be turned OFF subsequently by adding a reducing agent such as vitamin C that reverts the sulfoxides to thioethers and thus returns the skin to its hydrophobic state. The release rate in the ON state can be tuned via the skin thickness as well as the oxidant concentration. The ability to regulate solute delivery from gels using smart skins is likely to prove significant in areas ranging from separations to agriculture and drug delivery.
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Affiliation(s)
- Sai Nikhil Subraveti
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Sebastian M Peters
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Morine G Nader
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Faraz A Burni
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Srinivasa R Raghavan
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States
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Malka E, Margel S. Engineering of PVA/PVP Hydrogels for Agricultural Applications. Gels 2023; 9:895. [PMID: 37998985 PMCID: PMC10671072 DOI: 10.3390/gels9110895] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/02/2023] [Accepted: 11/06/2023] [Indexed: 11/25/2023] Open
Abstract
Hydrogels have gained significant popularity in agricultural applications in terms of minimizing waste and mitigating the negative environmental impact of agrochemicals. This review specifically examines the utilization of environmentally friendly, shapable hydrogels composed of polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP) in various casings for crop protection against different pests, fertilizing, and watering. To activate their effectiveness, PVA/PVP hydrogels were loaded with both hydrophilic and hydrophobic environmentally friendly pesticides, namely hydrogen peroxide (HP), the essential oil thymol, and urea as a fertilizer, either separately or in combination. This review covers various physical and chemical approaches used for loading, shaping, and controlling the release profiles of pesticides and fertilizers. Additionally, it explores the evaluation of the chemical composition, structure, classification, rheology, and morphology of the hydrogels as well as their impact on the thermal stability of the encapsulated pesticides and fertilizer, followed by biological tests. These hydrogels significantly contribute to the stabilization and controlled release of essential nutrients and biocides for plants, while maintaining excellent biocidal and fertilizing properties as well as sustainability characteristics. By shedding light on the latest insights into the concepts, applications, and results of these hydrogels, this review demonstrates their immense potential for widespread future use in agriculture.
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Affiliation(s)
| | - Shlomo Margel
- Bar-Ilan Institute of Nanotechnology and Advanced Materials (BINA), Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel
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4
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Cortes Ruiz MF, Brusentsev Y, Lindström SB, Xu C, Wågberg L. Shape-recovering nanocellulose networks: Preparation, characterization and modeling. Carbohydr Polym 2023; 315:120950. [PMID: 37230608 DOI: 10.1016/j.carbpol.2023.120950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/20/2023] [Accepted: 04/22/2023] [Indexed: 05/27/2023]
Abstract
Development of strong cellulose nanofibril (CNF) networks for advanced applications, such as in the biomedical field, is of high importance owing to the biocompatible nature and plant-based origin of cellulose nanofibrils. Nevertheless, lack of mechanical strength and complex synthesis methods hinder the application of these materials in areas where both toughness and manufacturing simplicity are required. In this work, we introduce a facile method for the synthesis of a low solid content (< 2 wt%), covalently crosslinked CNF hydrogel where Poly (N-isopropylacrylamide) (NIPAM) chains are utilized as crosslinks between the nanofibrils. The resulting networks have the capability to fully recover the shape in which they were formed after various drying and rewetting cycles. Characterization of the hydrogel and its constitutive components was performed using X-ray scattering, rheological investigations and uniaxial testing in compression. Influence of covalent crosslinks was compared with networks crosslinked by the addition of CaCl2. Among other things the results show that the mechanical properties of the hydrogels can be tuned by controlling the ionic strength of the surrounding medium. Finally, a mathematical model was developed based on the experimental results, which describes and predicts to a decent degree the large-deformation, elastoplastic behavior, and fracture of these networks.
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Affiliation(s)
- Maria F Cortes Ruiz
- Fiber Technology Division, Fiber and Polymer Technology Department, KTH Royal Institute of Technology, 114 28 Stockholm, Sweden; Wallenberg Wood Science Center, Fiber and Polymer Technology Department, KTH Royal Institute of Technology, 114 28 Stockholm, Sweden
| | - Yury Brusentsev
- Laboratory of Natural Materials Technology, Åbo Akademi University, 20500 Åbo, Finland
| | | | - Chunlin Xu
- Laboratory of Natural Materials Technology, Åbo Akademi University, 20500 Åbo, Finland
| | - Lars Wågberg
- Fiber Technology Division, Fiber and Polymer Technology Department, KTH Royal Institute of Technology, 114 28 Stockholm, Sweden; Wallenberg Wood Science Center, Fiber and Polymer Technology Department, KTH Royal Institute of Technology, 114 28 Stockholm, Sweden.
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5
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Tariq Z, Iqbal DN, Rizwan M, Ahmad M, Faheem M, Ahmed M. Significance of biopolymer-based hydrogels and their applications in agriculture: a review in perspective of synthesis and their degree of swelling for water holding. RSC Adv 2023; 13:24731-24754. [PMID: 37601588 PMCID: PMC10437007 DOI: 10.1039/d3ra03472k] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 08/11/2023] [Indexed: 08/22/2023] Open
Abstract
Hydrogels are three-dimensional polymer networks that are hydrophilic and capable of retaining a large amount of water. Hydrogels also can act as vehicles for the controlled delivery of active compounds. Bio-polymers are polymers that are derived from natural sources. Hydrogels prepared from biopolymers are considered non-toxic, biocompatible, biodegradable, and cost-effective. Therefore, bio-polymeric hydrogels are being extensively synthesized and used all over the world. Hydrogels based on biopolymers finds important applications in the agricultural field where they are used as soil conditioning agents as they can increase the water retention ability of soil and can act as a carrier of nutrients and other agrochemicals. Hydrogels are also used for the controlled delivery of fertilizer to plants. In this review, bio-polymeric hydrogels based on starch, chitosan, guar gum, gelatin, lignin, and alginate polymer have been discussed in terms of their synthesis method, swelling behavior, and possible agricultural application. The urgency to address water scarcity and the need for sustainable water management in agriculture necessitate the exploration and implementation of innovative solutions. By understanding the synthesis techniques and factors influencing the swelling behavior of these hydrogels, we can unlock their full potential in fostering sustainable agriculture and mitigating the challenges posed by an ever-changing environment.
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Affiliation(s)
- Zaryab Tariq
- Department of Chemistry, The University of Lahore Lahore Pakistan
| | - Dure Najaf Iqbal
- Department of Chemistry, The University of Lahore Lahore Pakistan
| | - Muhammad Rizwan
- Department of Chemistry, The University of Lahore Lahore Pakistan
| | - Muhammad Ahmad
- Department of Chemistry, Division of Science and Technology, University of Education Lahore 54770 Pakistan
| | - Muhammad Faheem
- Department of Chemistry, Division of Science and Technology, University of Education Lahore 54770 Pakistan
| | - Mahmood Ahmed
- Department of Chemistry, Division of Science and Technology, University of Education Lahore 54770 Pakistan
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6
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Ahmaruzzaman M, Roy P, Bonilla-Petriciolet A, Badawi M, Ganachari SV, Shetti NP, Aminabhavi TM. Polymeric hydrogels-based materials for wastewater treatment. CHEMOSPHERE 2023; 331:138743. [PMID: 37105310 DOI: 10.1016/j.chemosphere.2023.138743] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 05/19/2023]
Abstract
Low-cost and reliable wastewater treatment is a relevant issue worldwide to reduce the concentration of environmental pollutants. Industrial effluents containing dyes, heavy metals, and other inorganic and organic compounds can pollute water resources; therefore, novel technologies are required to mitigate and control their release into the environment. Adsorption is one of the simplest methods for treating contaminated water in which a wide spectrum of adsorbents can be used to remove emerging compounds. Hydrogels are interesting materials with high adsorption capacities that can be synthesized via green routes. These adsorbents are promising for large-scale industrial wastewater treatment applications; however, gaps still exist in achieving sustainable commercial implementation. This review focuses on the discussion and analysis of preparation, characterization, and adsorption properties of hydrogels for water purification. The advantages of these polymeric materials for water treatment were analyzed, including their performance in the removal of different organic and inorganic contaminants. Recent advances in the functionalization of hydrogels and the synthesis of novel composites have also been described. The adsorption capacities of hydrogel-based adsorbents are higher than 500 mg/g for different organic and inorganic pollutants, and can reach values of up to >2000 mg/g for organic compounds, significantly outperforming other materials reported for water cleaning. The main interactions involved in the adsorption of water pollutants using hydrogel-based adsorbents were described and explained to allow the interpretation of their removal mechanisms. The current challenges in the implementation of hydrogels for water purification in real-life operations are also highlighted. This review provides an updated picture of hydrogels as interesting materials to address water depollution worldwide.
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Affiliation(s)
- Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology Silchar, 788010, Assam, India.
| | - Prerona Roy
- Department of Chemistry, National Institute of Technology Silchar, 788010, Assam, India
| | | | - Michael Badawi
- Laboratoire de Physique et Chimie Théoriques UMR CNRS 7019, Université de Lorraine, Nancy, France
| | - Sharanabasava V Ganachari
- Center for Energy and Environment, School of Advanced Sciences, KLE Technological University, Hubballi, 580 031, India
| | - Nagaraj P Shetti
- Center for Energy and Environment, School of Advanced Sciences, KLE Technological University, Hubballi, 580 031, India
| | - Tejraj M Aminabhavi
- Center for Energy and Environment, School of Advanced Sciences, KLE Technological University, Hubballi, 580 031, India.
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7
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Jiménez HD, Orozco E, Hernández SL, Ramírez AC, Velázquez JM, Velazquez G, Minjarez ADC, Zamudio A, Flores MM, Velasco SF. Evaluation of Acute Toxicity and Antioxidant Response of Earthworm Exposed to a Lignin-Modified Crosslinked Hydrogel. TOXICS 2023; 11:476. [PMID: 37368576 DOI: 10.3390/toxics11060476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 05/10/2023] [Accepted: 05/21/2023] [Indexed: 06/29/2023]
Abstract
Hydrogels are polymers of great importance due to their multiple applications, which have led to an exponential increase in their production. However, once they have fulfilled their function, they become waste and their ecotoxicological effects are unknown. The aim of the present study was to evaluate the acute toxicity and total antioxidant capacity of the earthworm (Eisenia fetida) exposed to a terpolymeric hydrogel (acrylic acid, acrylamide, and 2-acrylamido-2-methyl-1-propane-sulfonic acid) crosslinked with modified kraft lignin. Four different amounts of hydrogel per unit area were evaluated (0.0924, 0.1848, 0.9242, and 1.848 mg hydrogel/cm2) plus a control, and three replicates were performed for each group. Starting from the amount of 0.1848 mg hydrogel/cm2, the earthworms showed physiological and behavioral alterations; at higher amounts, 0.9242 and 1.848 mg hydrogel/cm2, more acute signs were observed with mortality rates of 51.7% and 100%, respectively. On the other hand, the antioxidant activity assay showed that the higher the hydrogel exposure amount, the higher the oxidative stress, as evidenced by lower antioxidant activity (67.09% inhibition of the ABTS●+ radical). Therefore, we concluded that the lignin-modified hydrogel generated oxidative stress and acute lethal toxic effects in Eisenia fetida.
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Affiliation(s)
- Humberto D Jiménez
- Chemistry Department, School of Exact Sciences and Engineering, University of Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Olímpica, Guadalajara 44430, Jalisco, Mexico
| | - Eulogio Orozco
- Chemistry Department, School of Exact Sciences and Engineering, University of Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Olímpica, Guadalajara 44430, Jalisco, Mexico
| | - Saira L Hernández
- Chemistry Department, School of Exact Sciences and Engineering, University of Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Olímpica, Guadalajara 44430, Jalisco, Mexico
| | - Ana C Ramírez
- Chemistry Department, School of Exact Sciences and Engineering, University of Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Olímpica, Guadalajara 44430, Jalisco, Mexico
| | - José M Velázquez
- Chemistry Department, School of Exact Sciences and Engineering, University of Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Olímpica, Guadalajara 44430, Jalisco, Mexico
| | - Gilberto Velazquez
- Chemistry Department, School of Exact Sciences and Engineering, University of Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Olímpica, Guadalajara 44430, Jalisco, Mexico
| | - Amelia Del C Minjarez
- Institute of Educational Management for Health and Society, Pablo Quiroga 289, Constitución, Zapopan 45180, Jalisco, Mexico
| | - Adalberto Zamudio
- Department of Physics, School of Exact Sciences and Engineering, University of Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Olímpica, Guadalajara 44430, Jalisco, Mexico
| | - Milagros M Flores
- Medical Science, University of Colima, Avenida Universidad 333, Las Víboras, Colima 28040, Colima, Mexico
| | - Sandra F Velasco
- Chemistry Department, School of Exact Sciences and Engineering, University of Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Olímpica, Guadalajara 44430, Jalisco, Mexico
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8
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Foudazi R, Zowada R, Manas-Zloczower I, Feke DL. Porous Hydrogels: Present Challenges and Future Opportunities. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2092-2111. [PMID: 36719086 DOI: 10.1021/acs.langmuir.2c02253] [Citation(s) in RCA: 50] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
In this feature article, we critically review the physical properties of porous hydrogels and their production methods. Our main focus is nondense hydrogels that have physical pores besides the space available between adjacent cross-links in the polymer network. After reviewing theories on the kinetics of swelling, equilibrium swelling, the structure-stiffness relationship, and solute diffusion in dense hydrogels, we propose future directions to develop models for porous hydrogels. The aim is to show how porous hydrogels can be designed and produced for studies leading to the modeling of physical properties. Additionally, different methods that are used for making hydrogels with physically incorporated pores are briefly reviewed while discussing the potentials, challenges, and future directions for each method. Among kinetic methods, we discuss bubble generation approaches including reactions, gas injection, phase separation, electrospinning, and freeze-drying. Templating approaches discussed are solid-phase, self-assembled amphiphiles, emulsion, and foam methods.
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Affiliation(s)
- Reza Foudazi
- School of Chemical, Biological, and Materials Engineering, University of Oklahoma, Norman, Oklahoma73069, United States
| | - Ryan Zowada
- Department of Chemical and Materials Engineering, New Mexico State University, Las Cruces, New Mexico88003, United States
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9
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S Karthick Raja Namasivayam, U Karthika Pandian, Vani Chava, R S Arvind Bharani, M Kavisri, Meivelu Moovendhan. Chitosan nanocomposite as an effective carrier of potential herbicidal metabolites for noteworthy phytotoxic effect against major aquatic invasive weed water hyacinth (Eichhornia crassipes). Int J Biol Macromol 2023; 226:1597-1610. [PMID: 36455822 DOI: 10.1016/j.ijbiomac.2022.11.272] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 11/25/2022] [Accepted: 11/26/2022] [Indexed: 11/29/2022]
Abstract
In this current work, the herbicidal activity of fungal metabolites stacked chitosan nanocomposite against significant aquatic invasive weed Eichhornia crassipes (water hyacinth) was examined. Herbicidal metabolites from the fungal strain Allophoma oligotrophica were extracted and purified under standard condition. Altered ionic gelation technique was received for the amalgamation of chitosan nanocomposite fabricated with herbicidal metabolites. Synthesized nanocomposite incited checked herbicidal impact on the leaflets of water hyacinth. Synthesized nanocomposite induced marked herbicidal effect on the tested leaflets of water hyacinth. Necrotic development on the tested leaflets at earlier incubation period followed by progressive enhancement of necrotic lesion reveals the noteworthy herbicidal activity of the synthesized nanocomposite. Parenchymal, mesenchymal tissue disintegration, reduction of total chlorophyll content, elevated anti oxidative enzymes and changes in qualitative protein profiling of tested leaflets reveals the nanocomposite induced noteworthy morphometric and functional effects. Effect of solvents on the release profile demonstrates that ethyl acetate treatment brought about controlled or sustained release of metabolites. No sign of toxic effect on the zebra fish embryonic developmental stages revealed biocompatibility of the nanocomposite.
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Affiliation(s)
- S Karthick Raja Namasivayam
- Department of Research & Innovation, Saveetha School of Engineering, SIMATS deemed University, Chennai 602195, Tamil Nadu, India
| | - U Karthika Pandian
- Centre for Bioresource Research and Development (C-BIRD), Department of Biotechnology, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India
| | - Vani Chava
- Centre for Bioresource Research and Development (C-BIRD), Department of Biotechnology, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India
| | - R S Arvind Bharani
- Department of Research & Innovation, Saveetha School of Engineering, SIMATS deemed University, Chennai 602195, Tamil Nadu, India
| | - M Kavisri
- Department of Civil Engineering, School of building and Environment, Sathyabama Institute of Science &Technology, Chennai 600119, Tamil Nadu, India
| | - Meivelu Moovendhan
- Centre for Ocean Research, Col.Dr. Jeppiaar Research Park, Sathyabama Institute of Science & Technology, Chennai 600119, Tamil Nadu, India.
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Optimization of biodegradable cross-linked guar-gum-PLA superabsorbent hydrogel formation employing response surface methodology. Int J Biol Macromol 2022; 223:652-662. [PMID: 36356878 DOI: 10.1016/j.ijbiomac.2022.11.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 10/26/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022]
Abstract
Cross-linked polymer networks with three-dimensional structures known as hydrogels absorb and retain a large amount of water. Because of their properties, hydrogel materials have been considered a boon in agriculture science. In the present investigation, guar gum cross-linked polylactic acid hydrogel is synthesized using MMA as monomer and optimized using a central composite design of response surface methodology for better swelling. The studied input variables are monomer concentration, initiator concentration, and cross-linker concentration at constant pH and temperature. The constructed response model has been tested using the analysis of variance (ANOVA), where the model F-value of 4.64 indicates that the model is significant. The R2 value (0.806) (multiple correlation coefficient) and the standard deviation for the quadratic model were both found to be 4.27. A separate validation experiment is conducted to ensure the quadratic model is sufficient. The hydrogel synthesis was confirmed by characterization techniques like FTIR spectroscopy, SEM, TGA, XRD, and water absorption studies. Synthesized hydrogels swell maximum in water and least in 0.9 % NaCl solution. The present work highlights the development of guar gum-based super-absorbent hydrogels, which are biodegradable and lead to potential application in agriculture, especially in drought regions.
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Podaru IA, Stănescu PO, Ginghină R, Stoleriu Ş, Trică B, Şomoghi R, Teodorescu M. Poly(N-vinylpyrrolidone)-Laponite XLG Nanocomposite Hydrogels: Characterization, Properties and Comparison with Divinyl Monomer-Crosslinked Hydrogels. Polymers (Basel) 2022; 14:polym14194216. [PMID: 36236165 PMCID: PMC9571604 DOI: 10.3390/polym14194216] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/03/2022] [Accepted: 10/04/2022] [Indexed: 11/12/2022] Open
Abstract
The present work investigates, for the first time, the synthesis and properties of some nanocomposite (NC) hydrogels obtained by the aqueous solution free radical polymerization of N-vinylpyrrolidone (NVP) in the presence of Laponite XLG (XLG) as a crosslinker, in comparison with the corresponding hydrogels prepared by using two conventional crosslinking divinyl monomers: N,N'-methylenebisacrylamide (MBA) and tri(ethylene glycol) divinyl ether (DVE). The structure and properties of the hydrogels were studied by FTIR, TEM, XRD, SEM, swelling and rheological and compressive mechanical measurements. The results showed that DVE and XLG are much better crosslinking agents for the synthesis of PNVP hydrogels than MBA, leading to larger gel fractions and more homogeneous network hydrogels. The hydrogels crosslinked by either DVE or XLG displayed comparable viscoelastic and compressive mechanical properties under the experimental conditions employed. The properties of the XLG-crosslinked hydrogels steadily improved as the clay content increased. The addition of XLG as a second crosslinker together with a divinyl monomer strongly enhanced the material properties in comparison with the hydrogels crosslinked by only one of the crosslinkers involved. The FTIR analyses suggested that the crosslinking of the NC hydrogels was the result of two different interactions occurring between the clay platelets and the PNVP chains. Laponite XLG displayed a uniform distribution within the NC hydrogels, the clay being mostly exfoliated. However, a small number of platelet agglomerations were still present. The PNVP hydrogels described here may find applications for water purification and in the biomedical field as drug delivery systems or wound dressings.
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Affiliation(s)
- Ionela Alice Podaru
- Department of Bioresources and Polymer Science, Faculty of Chemical Engineering and Biotechnologies, Politehnica University of Bucharest, 1–7 Gh. Polizu Str., 011061 Bucharest, Romania
- Armament Systems and Mechatronics Department, Military Technical Academy “Ferdinand I”, 39–49 G. Cosbuc Blvd., 050141 Bucharest, Romania
| | - Paul O. Stănescu
- Department of Bioresources and Polymer Science, Faculty of Chemical Engineering and Biotechnologies, Politehnica University of Bucharest, 1–7 Gh. Polizu Str., 011061 Bucharest, Romania
- Advanced Polymer Materials Group, Politehnica University of Bucharest, 1–7 Gh. Polizu Str., 011061 Bucharest, Romania
| | - Raluca Ginghină
- Chemical Technologies for CBRN Defense Department, Research and Innovation Center for CBRN Defense and Ecology, 225 Olteniţei Ave., 041327 Bucharest, Romania
| | - Ştefania Stoleriu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, Politehnica University of Bucharest, 1–7 Gh. Polizu Str., 011061 Bucharest, Romania
| | - Bogdan Trică
- National Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, Spl. Independentei 202, 060021 Bucharest, Romania
| | - Raluca Şomoghi
- National Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, Spl. Independentei 202, 060021 Bucharest, Romania
- Faculty of Petroleum Technology and Petrochemistry, Petroleum and Gas University of Ploiesti, 39 Bucuresti Blvd., 100680 Ploiesti, Romania
| | - Mircea Teodorescu
- Department of Bioresources and Polymer Science, Faculty of Chemical Engineering and Biotechnologies, Politehnica University of Bucharest, 1–7 Gh. Polizu Str., 011061 Bucharest, Romania
- Correspondence: ; Tel.: +40-7-4590-7871
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Piazzoni M, Negri A, Brambilla E, Giussani L, Pitton S, Caccia S, Epis S, Bandi C, Locarno S, Lenardi C. Biodegradable floating hydrogel baits as larvicide delivery systems against mosquitoes. SOFT MATTER 2022; 18:6443-6452. [PMID: 35983789 DOI: 10.1039/d2sm00889k] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Biological methods for mosquito larvae control are completely biodegradable and have null or limited effects on nontarget organisms. However, commercially available products have a low residual activity, with the consequent need for multiple applications that inevitably increase costs and the risk of resistance phenomena insurgence. Smart delivery systems made of hydrogels proved their efficacy in increasing the action duration of biolarvicides up to several months, but the lack of an efficient baiting mechanism to strongly attract the target pest remains a problem in practical applications. In this work, we investigated two novel hydrogel-based formulations of completely natural composition for baiting and killing larvae of Aedes albopictus mosquitos. The proposed materials consist of charged crosslinked polysaccharides (chitosan and cellulose) and are specifically manufactured to float in water, simulating organic matter usually present at breeding sites. Within the hydrogels' matrix, yeast colonies of Saccharomyces cerevisiae were embedded as phagostimulants alongside a biolarvicide (Bacillus thuringiensis var. israelensis (Bti)). Despite the similar chemical nature and structure, chitosan-based hydrogels exhibited a markedly superior baiting potential compared to those made of cellulose and also succeeded in efficiently killing mosquito larvae just after a few hours from administration. We are confident that the proposed smart delivery hydrogel made of chitosan can be an enabling tool to attract mosquito larvae towards biopesticides of different nature without delocalizing active ingredients away from the breeding site and to simultaneously increase their residual activity, thus holding the potential of minimizing environmental pollution related to pest control and vector-borne disease prevention.
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Affiliation(s)
- Marco Piazzoni
- CIMAINA, Physics Department, Università degli Studi di Milano, Via Celoria 16, 20133, Milano, Italy
| | - Agata Negri
- Department of Biosciences and Pediatric CRC "Romeo ed Enrica Invernizzi", University of Milan, Milan, ItalyVia Celoria 26, 20133, Milan, Italy
| | - Elisa Brambilla
- Department of Pharmaceutical Sciences, Section of General and Organic Chemistry "A. Marchesisi", Università degli Studi di Milano, Via Venezian 21, 20133, Milano, Italy
| | - Laura Giussani
- CIMAINA, Physics Department, Università degli Studi di Milano, Via Celoria 16, 20133, Milano, Italy
| | - Simone Pitton
- Department of Biosciences and Pediatric CRC "Romeo ed Enrica Invernizzi", University of Milan, Milan, ItalyVia Celoria 26, 20133, Milan, Italy
| | - Silvia Caccia
- Department of Biosciences and Pediatric CRC "Romeo ed Enrica Invernizzi", University of Milan, Milan, ItalyVia Celoria 26, 20133, Milan, Italy
| | - Sara Epis
- Department of Biosciences and Pediatric CRC "Romeo ed Enrica Invernizzi", University of Milan, Milan, ItalyVia Celoria 26, 20133, Milan, Italy
| | - Claudio Bandi
- Department of Biosciences and Pediatric CRC "Romeo ed Enrica Invernizzi", University of Milan, Milan, ItalyVia Celoria 26, 20133, Milan, Italy
| | - Silvia Locarno
- Physics Department, Università degli Studi di Milano, Via Celoria 16, 20133, Milano, Italy.
| | - Cristina Lenardi
- CIMAINA, Physics Department, Università degli Studi di Milano, Via Celoria 16, 20133, Milano, Italy
- Physics Department, Università degli Studi di Milano, Via Celoria 16, 20133, Milano, Italy.
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13
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Shah JA, Vendl T, Aulicky R, Frankova M, Stejskal V. Gel Carriers for Plant Extracts and Synthetic Pesticides in Rodent and Arthropod Pest Control: An Overview. Gels 2022; 8:gels8080522. [PMID: 36005123 PMCID: PMC9407565 DOI: 10.3390/gels8080522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/16/2022] [Accepted: 08/16/2022] [Indexed: 12/31/2022] Open
Abstract
Insecticides and rodenticides form the basis of integrated pest management systems worldwide. As pest resistance continues to increase and entire groups of chemical active ingredients are restricted or banned, manufacturers are looking for new options for more effective formulations and safer application methods for the remaining pesticide ingredients. In addition to new technological adaptations of mainstream formulations in the form of sprays, fumigants, and dusts, the use of gel formulations is becoming increasingly explored and employed. This article summarizes information on the current and potential use of gel (including hydrogel) and paste formulations against harmful arthropods or rodents in specific branches of pest management in the agricultural, food, stored product, structural wood, urban, medical, and public health areas. Due to the worldwide high interest in natural substances, part of the review was devoted to the use of gels for the formulation of pesticide substances of botanical origin, such as essential or edible oils. Gels as emerging formulation of so called “smart insecticides” based on molecular iRNA disruptors are discussed.
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Affiliation(s)
- Jawad Ali Shah
- Department of Plant Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, 16500 Prague, Czech Republic
| | - Tomas Vendl
- Crop Research Institute, Drnovska 507/73, 16106 Prague, Czech Republic
- Correspondence: (T.V.); (V.S.); Tel.: +420-2-3302-2360 (T.V.); +420-2-3302-2217 (V.S.)
| | - Radek Aulicky
- Crop Research Institute, Drnovska 507/73, 16106 Prague, Czech Republic
| | - Marcela Frankova
- Crop Research Institute, Drnovska 507/73, 16106 Prague, Czech Republic
| | - Vaclav Stejskal
- Department of Plant Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, 16500 Prague, Czech Republic
- Crop Research Institute, Drnovska 507/73, 16106 Prague, Czech Republic
- Correspondence: (T.V.); (V.S.); Tel.: +420-2-3302-2360 (T.V.); +420-2-3302-2217 (V.S.)
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14
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Rehman TU, Shah LA. Rheological investigation of polymer hydrogels for industrial application: a review. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2022. [DOI: 10.1080/1023666x.2022.2105876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Tanzil Ur Rehman
- Polymer Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar, Pakistan
| | - Luqman Ali Shah
- Polymer Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar, Pakistan
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15
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Gharbi K, Tay JW. Fumigant Toxicity of Essential Oils against Frankliniella occidentalis and F. insularis (Thysanoptera: Thripidae) as Affected by Polymer Release and Adjuvants. INSECTS 2022; 13:insects13060493. [PMID: 35735830 PMCID: PMC9224942 DOI: 10.3390/insects13060493] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/05/2022] [Accepted: 05/10/2022] [Indexed: 12/04/2022]
Abstract
Simple Summary Frankliniella occidentalis is among the most economically significant pests of greenhouse crops. In contrast, F. insularis is a relatively minor pest with a narrower distribution and host range. We conducted a series of fumigation assays to assess the vulnerability of both species to fumigation with essential oils released from hydrogels. These hydrogels contained either (R)-linalool, (S)-linalool, racemic linalool, or a binary mixture of (R)-linalool with one of twelve other essential oils. Solanum lycopersicum seedlings were screened for their sensitivity to the most potent fumigants, as determined from thrips bioassays. The least saturated hydrogels conditioned in essential oils were the most effective, and both species of thrips were more sensitive to (R)-linalool than to (S)-linalool. Frankliniella occidentalis was significantly more resistant to all treatments than F. insularis. Treatment of S. lycopersicum with the same concentrations of oils required to control thrips resulted in reduced root and hypocotyl lengths, most severely in seedlings exposed via foliar sprays than as fumigants. While our study demonstrates that essential oils are a promising alternative to conventional insecticides for thrips control, the resistance demonstrated by F. occidentalis underlines the need for judicious use of essential oils as part of broader pest control programs. Abstract Frankliniella occidentalis is among the most economically significant pests of greenhouse crops, whose resistance to conventional insecticides has created demand for biopesticides such as essential oils. We assessed the fumigant toxicity of linalool against F. occidentalis, F. insularis, and Solanum lycopersicum. Thrips were fumigated with polyacrylamide hydrogels containing either (R)-linalool, (S)-linalool, racemic linalool, or a binary mixture of (R)-linalool with one of twelve adjuvants (i.e., peppermint, cedarwood, neem, clove, coconut, jojoba, soybean, olive, α-terpineol, 1,8-cineole, trans-anethole, or (R)-pulegone). Solanum lycopersicum seedlings were exposed to (R)-linalool or a mixture of (R)-linalool and peppermint oil via conditioned hydrogels or foliar spray. For F. insularis, (R)-linalool was more toxic than (S)-linalool, with LC50 values of 11.7 mg/L air and 16.7 mg/L air, respectively. Similarly for F. occidentalis, (R)-linalool was more toxic than (S)-linalool, with LC50 values of 29.0 mg/L air and 34.9 mg/L air, respectively. Peppermint oil and α-terpineol were the only synergists, while the other adjuvants exhibited varying degrees of antagonism. All seedling treatments demonstrated phytotoxicity, but symptoms were most severe for foliar sprays and mixtures containing peppermint oil. While hydrogels conditioned in linalool may be a favorable substitute to conventional insecticides, the cross-resistance demonstrated herein indicates that expectations should be metered.
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16
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El-Aziz GHA, Ibrahim AS, Fahmy AH. Using Environmentally Friendly Hydrogels to Alleviate the Negative Impact of Drought on Plant. OPEN JOURNAL OF APPLIED SCIENCES 2022; 12:111-133. [DOI: 10.4236/ojapps.2022.121009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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17
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Rehman A, Feng J, Qunyi T, Korma SA, Assadpour E, Usman M, Han W, Jafari SM. Pesticide-loaded colloidal nanodelivery systems; preparation, characterization, and applications. Adv Colloid Interface Sci 2021; 298:102552. [PMID: 34717205 DOI: 10.1016/j.cis.2021.102552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 10/08/2021] [Accepted: 10/16/2021] [Indexed: 11/29/2022]
Abstract
The fast developments in pesticide-loaded nanodelivery systems over the last decade have inspired many companies and research organizations to highlight potential applications by employing encapsulation approaches in order to protect the agricultural crops. This approach is being used to retard the indiscriminate application of conventional pesticides, as well as, to make ensure the environmental safety. This article shed light on the potential of colloidal delivery systems, particularly controlled releasing profiles of several pesticides with enhanced stability and improved solubility. Colloidal nanodelivery systems, being efficient nanoformulations, have the ability to boost up the pest-control competence for prolonged intervals thru averting the early degradation of active ingredients under severe ecofriendly circumstances. This work is thus aimed to provide critical information on the meaningful role of nanocarriers for loading of pesticides. The smart art of pesticide-loaded nanocarriers can be more fruitful owing to the use of lower amount of active ingredients with improved efficiency along with minimizing the pesticide loss. Also, the future research gaps regarding nano-pesticide formulations, such as role of nanomaterials as active ingredients are discussed briefly. In addition, this article can deliver valuable information to the readers while establishing novel pesticide-loaded nanocarriers for a wide range of applications in the agriculture sectors.
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Affiliation(s)
- Abdur Rehman
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jianguo Feng
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China.
| | - Tong Qunyi
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China.
| | - Sameh A Korma
- Department of Food Science, Faculty of Agriculture, Zagazig University, 114 El-Zeraa Road, Zagazig 44511, Sharkia, Egypt; School of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510641, Guangdong, China
| | - Elham Assadpour
- Nutrition and Bromatology Group, Analytical and Food Chemistry Department, Faculty of Food Science and Technology, University of Vigo, Ourense Campus, Ourense E-32004, Spain
| | - Muhammad Usman
- Beijing Advance Innovation center for Food Nutrition and Human Health, School of Food and Chemical Technology, Beijing Technology and Business University, Beijing 100048, China
| | - Wen Han
- School of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510641, Guangdong, China
| | - Seid Mahdi Jafari
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran.
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18
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Correa S, Grosskopf AK, Lopez Hernandez H, Chan D, Yu AC, Stapleton LM, Appel EA. Translational Applications of Hydrogels. Chem Rev 2021; 121:11385-11457. [PMID: 33938724 PMCID: PMC8461619 DOI: 10.1021/acs.chemrev.0c01177] [Citation(s) in RCA: 350] [Impact Index Per Article: 116.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Indexed: 12/17/2022]
Abstract
Advances in hydrogel technology have unlocked unique and valuable capabilities that are being applied to a diverse set of translational applications. Hydrogels perform functions relevant to a range of biomedical purposes-they can deliver drugs or cells, regenerate hard and soft tissues, adhere to wet tissues, prevent bleeding, provide contrast during imaging, protect tissues or organs during radiotherapy, and improve the biocompatibility of medical implants. These capabilities make hydrogels useful for many distinct and pressing diseases and medical conditions and even for less conventional areas such as environmental engineering. In this review, we cover the major capabilities of hydrogels, with a focus on the novel benefits of injectable hydrogels, and how they relate to translational applications in medicine and the environment. We pay close attention to how the development of contemporary hydrogels requires extensive interdisciplinary collaboration to accomplish highly specific and complex biological tasks that range from cancer immunotherapy to tissue engineering to vaccination. We complement our discussion of preclinical and clinical development of hydrogels with mechanical design considerations needed for scaling injectable hydrogel technologies for clinical application. We anticipate that readers will gain a more complete picture of the expansive possibilities for hydrogels to make practical and impactful differences across numerous fields and biomedical applications.
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Affiliation(s)
- Santiago Correa
- Materials
Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Abigail K. Grosskopf
- Chemical
Engineering, Stanford University, Stanford, California 94305, United States
| | - Hector Lopez Hernandez
- Materials
Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Doreen Chan
- Chemistry, Stanford University, Stanford, California 94305, United States
| | - Anthony C. Yu
- Materials
Science & Engineering, Stanford University, Stanford, California 94305, United States
| | | | - Eric A. Appel
- Materials
Science & Engineering, Stanford University, Stanford, California 94305, United States
- Bioengineering, Stanford University, Stanford, California 94305, United States
- Pediatric
Endocrinology, Stanford University School
of Medicine, Stanford, California 94305, United States
- ChEM-H Institute, Stanford
University, Stanford, California 94305, United States
- Woods
Institute for the Environment, Stanford
University, Stanford, California 94305, United States
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19
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Lipowczan A, Trochimczuk AW. Phosphates-Containing Interpenetrating Polymer Networks (IPNs) Acting as Slow Release Fertilizer Hydrogels (SRFHs) Suitable for Agricultural Applications. MATERIALS 2021; 14:ma14112893. [PMID: 34071203 PMCID: PMC8199159 DOI: 10.3390/ma14112893] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/14/2021] [Accepted: 05/21/2021] [Indexed: 11/16/2022]
Abstract
Novel, phosphorus-containing slow release fertilizer hydrogels (SRFHs) composed of interpenetrating polymer networks (IPNs) with very good swelling and mechanical properties have been obtained and characterized. It was found that introducing organophosphorus polymer based on a commercially available monomer, 2-methacryloyloxyethyl phosphate (MEP), as the IPN’s first component network results in much better swelling properties than for a terpolymer with acrylic acid (AAc), 2-methacryloyloxyethyl phosphate (MEP) and bis[2-(methacryloyloxy)ethyl] phosphate (BMEP) when the same weight ratios of monomers are employed. The procedure described in this paper enables the introduction of much larger amounts of phosphorus into polymer structures without significant loss of water regain ability, which is crucial in the application of such materials in the agricultural field.
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20
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Bignotti F, Baldi F, Grassi M, Abrami M, Spagnoli G. Hydrophobically-Modified PEG Hydrogels with Controllable Hydrophilic/Hydrophobic Balance. Polymers (Basel) 2021; 13:polym13091489. [PMID: 34066409 PMCID: PMC8124857 DOI: 10.3390/polym13091489] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/01/2021] [Accepted: 05/03/2021] [Indexed: 01/18/2023] Open
Abstract
This work reports on a novel method to synthesize hydrophobically-modified hydrogels by curing epoxy monomers with amines. The resulting networks contain hydrophilic poly(ethylene glycol) (PEG) segments, poly(propylene glycol) (PPG) segments, and C18 alkyl segments. By varying the content of C18 segments, networks with different hydrophilic-lipophilic balance (HLB) are obtained. All networks show an amphiphilic behavior, swelling considerably both in organic solvents and in aqueous media. In the latter they display a thermosensitive behavior, which is highly affected by the network HLB and the pH of the solution. A decrease in HLB results in an increment of the polymer weight content (wp) due to hydrophobic association. Furthermore, a reduction in HLB induces a remarkable increase in initial modulus, elongation at break and tensile strength, especially when wp becomes greater than about 10%. Low field nuclear magnetic resonance (LF-NMR) experiments evidence that, when HLB decreases, a sudden and considerable increase in hydrogel heterogeneity takes place due to occurrence of extensive physical crosslinking. Available data suggest that in systems with wp ≳ 10% a continuous physical network superimposes to the pre-existing chemical network and leads to a sort of double network capable of considerably improving hydrogel toughness.
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Affiliation(s)
- Fabio Bignotti
- Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, I-25123 Brescia, Italy; (F.B.); (G.S.)
- Correspondence:
| | - Francesco Baldi
- Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, I-25123 Brescia, Italy; (F.B.); (G.S.)
| | - Mario Grassi
- Department of Engineering and Architecture, University of Trieste, Building B, via Valerio 6, I-34127 Trieste, Italy; (M.G.); (M.A.)
| | - Michela Abrami
- Department of Engineering and Architecture, University of Trieste, Building B, via Valerio 6, I-34127 Trieste, Italy; (M.G.); (M.A.)
| | - Gloria Spagnoli
- Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, I-25123 Brescia, Italy; (F.B.); (G.S.)
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21
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Zinc micronutrient-loaded carboxymethyl tamarind kernel gum-based superabsorbent hydrogels: controlled release and kinetics studies for agricultural applications. Colloid Polym Sci 2021. [DOI: 10.1007/s00396-021-04831-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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22
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Maya C, Fernández-Ponce MT, Casas L, Mantell C, Martínez de la Ossa EJ. A comparative analysis on the impregnation efficiency of a natural insecticide into polypropylene films by means of batch against semi-continuous techniques using CO2 as solvent. J Supercrit Fluids 2021. [DOI: 10.1016/j.supflu.2020.105127] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Tay JW, Choe DH, Mulchandani A, Rust MK. Hydrogels: From Controlled Release to a New Bait Delivery for Insect Pest Management. JOURNAL OF ECONOMIC ENTOMOLOGY 2020; 113:2061-2068. [PMID: 32852040 PMCID: PMC7566487 DOI: 10.1093/jee/toaa183] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Indexed: 06/11/2023]
Abstract
Here, we review the literature on the development and application of hydrogel compounds for insect pest management. Researchers have used hydrogel compounds for the past few decades to achieve the controlled release of various contact insecticides, but in recent years, hydrogel compounds have also been used to absorb and deliver targeted concentrations of toxicants within a liquid bait to manage insect pests. The highly absorbent hydrogel acts as a controlled-release formulation that keeps the liquid bait available and palatable to the target pests. This review discusses the use of various types of hydrogel compounds in pest management based on different environmental settings (e.g., agricultural, urban, and natural areas), pest systems (e.g., different taxa), and modes of insecticide delivery (e.g., spray vs bait). Due to their unique physicochemical properties, hydrogel compounds have great potential to be developed into new and efficacious pest management strategies with minimal environmental impact. We will also discuss the future research and development of hydrogels in this review.
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Affiliation(s)
- Jia-Wei Tay
- Urban Entomology Laboratory, Department of Plant and Environmental Protection Sciences, University of Hawaii at Manoa, Honolulu, HI
| | | | - Ashok Mulchandani
- Department of Chemical Engineering, Riverside, CA
- Materials Science and Engineering Program, University of California Riverside, Riverside, CA
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24
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Wang S, Ma Q, Wang R, Zhu Q, Yang L, Zhang Z. Preparation of sodium alginate-poly (vinyl alcohol) blend beads for base-triggered release of dinotefuran in Spodoptera litera midgut. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 202:110935. [PMID: 32800218 DOI: 10.1016/j.ecoenv.2020.110935] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 06/18/2020] [Accepted: 06/21/2020] [Indexed: 06/11/2023]
Abstract
This study investigated the ability of dual crosslinked interpenetrating polymer network (IPN) blend beads (DIN:SA/PVA-beads), composed of sodium alginate (SA) and poly (vinyl alcohol) (PVA), as a base-triggered carrier for the controlled release of dinotefuran (DIN) in Spodoptera litera midgut. The blend beads were characterized for morphology, encapsulation efficiency, swelling degree, and in vitro release of the blend beads were characterized. The results revealed that the double-crosslinked gel beads had a tightly interpenetrating network structure and exhibited a satisfactory embedding effect for DIN. The maximum of the DIN loading capacity was approximately 1.01%, with a high encapsulation efficiency of 83.19%. The triggered release of DIN from the blend beads was studied in deionized water (pH 3.0-11.0) via high-performance liquid chromatography (HPLC); it was found that the release rate was higher in alkaline pH conditions than in acidic and neutral conditions. An in vivo dynamics and degradation study also demonstrated that the excellent release characteristics of DIN:SA/PVA-beads in the midgut of S. litera. This study provides a promising controlled-release form of dinotefuran that is more effective and can be used for the targeted control of pests with alkaline midgut.
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Affiliation(s)
- Shiying Wang
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Qianli Ma
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Ruifei Wang
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Qizhan Zhu
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Liupeng Yang
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China
| | - Zhixiang Zhang
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, 510642, China.
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25
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Kaur P, Choudhary R, Pal A, Mony C, Adholeya A. Polymer - Metal Nanocomplexes Based Delivery System: A Boon for Agriculture Revolution. Curr Top Med Chem 2020; 20:1009-1028. [DOI: 10.2174/1568026620666200330160810] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 01/22/2020] [Accepted: 02/18/2020] [Indexed: 01/22/2023]
Abstract
Metal nanoparticles are well known for their antimicrobial properties. The use of metalbased
nanoparticles in the agricultural field has considerably increased globally by both direct and
indirect means for the management of plant diseases. In this context, the development of controlled
delivery systems for slow and sustained release of metal nanoparticles is crucial for prolonged antimicrobial
activity. Polymers have emerged as a valuable carrier for controlled delivery of metal nanoparticles
as agrochemicals because of their distinctive properties. The most significant benefits of encapsulating
metal nanoparticles in a polymer matrix include the ability to function as a protector of metal
nanoparticles and their controlled release with prolonged efficacy. This review focuses on loading
strategies and releasing behavior of metal nanoparticles in the polymer matrix as antimicrobial agents
for plant diseases. The Polymer-metal nanocomplexes (PMNs) comprise a biocompatible polymeric
matrix and metal nanoparticles as active components of an antimicrobial agent, pesticides and plant
growth regulators used to enhance the crop productivity.
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Affiliation(s)
- Pawan Kaur
- Centre of Excellence in Agrinanotechnology, TERI-Deakin Nanobiotechnology Centre, Gurugram-122002, India
| | - Rita Choudhary
- Centre of Excellence in Agrinanotechnology, TERI-Deakin Nanobiotechnology Centre, Gurugram-122002, India
| | - Anamika Pal
- Centre of Excellence in Agrinanotechnology, TERI-Deakin Nanobiotechnology Centre, Gurugram-122002, India
| | - Chanchal Mony
- Centre of Excellence in Agrinanotechnology, TERI-Deakin Nanobiotechnology Centre, Gurugram-122002, India
| | - Alok Adholeya
- Centre of Excellence in Agrinanotechnology, TERI-Deakin Nanobiotechnology Centre, Gurugram-122002, India
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26
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Cuccia NL, Pothineni S, Wu B, Méndez Harper J, Burton JC. Pore-size dependence and slow relaxation of hydrogel friction on smooth surfaces. Proc Natl Acad Sci U S A 2020; 117:11247-11256. [PMID: 32398363 PMCID: PMC7260953 DOI: 10.1073/pnas.1922364117] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hydrogels consist of a cross-linked polymer matrix imbibed with a solvent such as water at volume fractions that can exceed 90%. They are important in many scientific and engineering applications due to their tunable physiochemical properties, biocompatibility, and ultralow friction. Their multiphase structure leads to a complex interfacial rheology, yet a detailed, microscopic understanding of hydrogel friction is still emerging. Using a custom-built tribometer, here we identify three distinct regimes of frictional behavior for polyacrylic acid (PAA), polyacrylamide (PAAm), and agarose hydrogel spheres on smooth surfaces. We find that at low velocities, friction is controlled by hydrodynamic flow through the porous hydrogel network and is inversely proportional to the characteristic pore size. At high velocities, a mesoscopic, lubricating liquid film forms between the gel and surface that obeys elastohydrodynamic theory. Between these regimes, the frictional force decreases by an order of magnitude and displays slow relaxation over several minutes. Our results can be interpreted as an interfacial shear thinning of the polymers with an increasing relaxation time due to the confinement of entanglements. This transition can be tuned by varying the solvent salt concentration, solvent viscosity, and sliding geometry at the interface.
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Affiliation(s)
| | | | - Brady Wu
- Department of Physics, Emory University, Atlanta, GA 30322
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Spiridon I, Anghel N, Dinu MV, Vlad S, Bele A, Ciubotaru BI, Verestiuc L, Pamfil D. Development and Performance of Bioactive Compounds-Loaded Cellulose/Collagen/Polyurethane Materials. Polymers (Basel) 2020; 12:E1191. [PMID: 32456132 PMCID: PMC7284988 DOI: 10.3390/polym12051191] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/19/2020] [Accepted: 05/20/2020] [Indexed: 12/19/2022] Open
Abstract
Here we present a new biomaterial based on cellulose, collagen and polyurethane, obtained by dissolving in butyl imidazole chloride. This material served as a matrix for the incorporation of tannin and lipoic acid, as well as bioactive substances with antioxidant properties. The introduction of these bioactive principles into the base matrix led to an increase of the compressive strength in the range 105-139 kPa. An increase of 29.85% of the mucoadhesiveness of the film containing tannin, as compared to the reference, prolongs the bioavailability of the active substance; a fact also demonstrated by the controlled release studies. The presence of bioactive principles, as well as tannins and lipoic acid, gives biomaterials an antioxidant capacity on average 40%-50% higher compared to the base matrix. The results of the tests of the mechanical resistance, mucoadhesiveness, bioadhesiveness, water absorption and antioxidant capacity of active principles recommend these biomaterials for the manufacture of cosmetic masks or patches.
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Affiliation(s)
- Iuliana Spiridon
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica–Vodă 41, 700487 Iași, Romania; (I.S.); (M.V.D.); (S.V.); (A.B.); (D.P.)
| | - Narcis Anghel
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica–Vodă 41, 700487 Iași, Romania; (I.S.); (M.V.D.); (S.V.); (A.B.); (D.P.)
| | - Maria Valentina Dinu
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica–Vodă 41, 700487 Iași, Romania; (I.S.); (M.V.D.); (S.V.); (A.B.); (D.P.)
| | - Stelian Vlad
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica–Vodă 41, 700487 Iași, Romania; (I.S.); (M.V.D.); (S.V.); (A.B.); (D.P.)
| | - Adrian Bele
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica–Vodă 41, 700487 Iași, Romania; (I.S.); (M.V.D.); (S.V.); (A.B.); (D.P.)
| | - Bianca Iulia Ciubotaru
- Faculty of Medical Bioengineering, Grigore T. Popa University of Medicine and Pharmacy, 9-13 Kogălniceanu Street, 700454 Iași, Romania; (B.I.C.); (L.V.)
| | - Liliana Verestiuc
- Faculty of Medical Bioengineering, Grigore T. Popa University of Medicine and Pharmacy, 9-13 Kogălniceanu Street, 700454 Iași, Romania; (B.I.C.); (L.V.)
| | - Daniela Pamfil
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica–Vodă 41, 700487 Iași, Romania; (I.S.); (M.V.D.); (S.V.); (A.B.); (D.P.)
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Klein M, Poverenov E. Natural biopolymer-based hydrogels for use in food and agriculture. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:2337-2347. [PMID: 31960453 DOI: 10.1002/jsfa.10274] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 01/12/2020] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
Hydrogels are important materials that are of high scientific interest and with numerous applications. Natural polymer-based hydrogels are preferred to synthetic ones due to their safety, biocompatibility, and ecofriendly properties. They have been studied extensively and implemented in various fields, such as medicine, cosmetics, personal-care products, water purification, and more. This review focuses on the applications of nature-sourced polymer-based hydrogels in food and agriculture. Different types of biopolymers and crosslinking agents, and various methods for hydrogel formation are described. The physicomechanical properties and applied activities of the resulting materials are also comprehensively discussed. Biodegradable synthetic polymers are outside the scope of this review. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Miri Klein
- The Institute of Postharvest and Food Science, Agro-Nanotechnology and Advanced Materials Center, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
| | - Elena Poverenov
- The Institute of Postharvest and Food Science, Agro-Nanotechnology and Advanced Materials Center, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
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Qi X, Zhang M, Su T, Pan W, Tong X, Zeng Q, Xiong W, Jiang N, Qian Y, Li Z, He X, Shen L, Zhou Z, Shen J. Biocompatible Hydrogels Based on Food Gums with Tunable Physicochemical Properties as Scaffolds for Cell Culture. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:3770-3778. [PMID: 32084311 DOI: 10.1021/acs.jafc.9b06120] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Hydrogels composed of food gums have gained attention for future biomedical applications, such as targeted delivery and tissue engineering. For their translation to clinical utilization, reliable biocompatibility, sufficient mechanical performance, and tunable structure of polysaccharide hydrogels are required aspects. In this work, we report a unique hybrid polysaccharide hydrogel composed of salecan and curdlan, in which the former is a thickening agent and the latter serves as a network matrix. The physicochemical properties, such as mechanical strength, thermal stability, swelling, and morphology, of the developed composite hydrogel can be accurately modulated by varying the polysaccharide content. Importantly, cytotoxicity assays show the non-toxicity of this hybrid hydrogel. Furthermore, this hydrogel system can support cell proliferation, migration, and function. Altogether, our work proposes a new strategy to build a polysaccharide-constructed hydrogel scaffold, which holds much promise for tissue engineering in terms of cell engraftment, survival, proliferation, and function.
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Affiliation(s)
- Xiaoliang Qi
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Mengying Zhang
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Ting Su
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Wenhao Pan
- Department of Orthodontics, School & Hospital of Stomatology, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Xianqin Tong
- Department of Orthodontics, School & Hospital of Stomatology, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Qiankun Zeng
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Wei Xiong
- Department of Urology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Ning Jiang
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Yuna Qian
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
| | - Zhipeng Li
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Xiaojun He
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Liangliang Shen
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Zaigang Zhou
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
| | - Jianliang Shen
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325027, People's Republic of China
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, People's Republic of China
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Capasso Palmiero U, Ilare J, Romani C, Moscatelli D, Sponchioni M. Surfactant-free and rinsing-resistant biodegradable nanoparticles with high adsorption on natural fibers for the long-lasting release of fragrances. Colloids Surf B Biointerfaces 2020; 190:110926. [PMID: 32155458 DOI: 10.1016/j.colsurfb.2020.110926] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 02/08/2020] [Accepted: 03/01/2020] [Indexed: 11/29/2022]
Abstract
Synthetic polymers are attracting growing attention as additives for laundry and personal care products. In particular, the high volatility of many common fragrances requires the development of polymeric particles for their encapsulation and controlled release. Unfortunately, the vast majority of these carriers is made from polymers that are not biodegradable. This poses severe concerns about the accumulation of nano- and microplastics. Hence, such particles are expected to be banned from the market in the coming years. Therefore, biodegradable particles enabling a long-lasting release of the fragrances are urgently needed. In this work, we produced biodegradable nanoparticles (NPs) that are structurally composed of lactones, i.e. well known perfumes that occur naturally and that are already considered safe by regulatory agencies. We polymerized these lactones via ring opening polymerization (ROP) using an ionizable tertiary amine as initiator to produce in a single step amphiphilic oligoesters able to directly self-assemble into NPs once nanoprecipitated in water. In this way, we can produce biodegradable NPs with a perfume loading up to 85 % w/w without the need for additional surfactants. Subsequently we show that the ionizable group is able to confer a positive charge to our nanoparticles and, in turn, a high adsorption capacity on natural fibers (i.e. hairs and cotton fabric). Finally, we demonstrate the nanoparticle resistance to rinsing and their ability to confer a long-lasting fragrance perception to treated hair swatches for at least 3 weeks.
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Affiliation(s)
- Umberto Capasso Palmiero
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland
| | - Juri Ilare
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131, Milano, Italy
| | - Carola Romani
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131, Milano, Italy
| | - Davide Moscatelli
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131, Milano, Italy
| | - Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131, Milano, Italy.
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Singh A, Dhiman N, Kar AK, Singh D, Purohit MP, Ghosh D, Patnaik S. Advances in controlled release pesticide formulations: Prospects to safer integrated pest management and sustainable agriculture. JOURNAL OF HAZARDOUS MATERIALS 2020; 385:121525. [PMID: 31740313 DOI: 10.1016/j.jhazmat.2019.121525] [Citation(s) in RCA: 139] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/21/2019] [Accepted: 10/21/2019] [Indexed: 05/26/2023]
Abstract
As the world is striving hard towards sustainable agricultural practices for a better tomorrow, one of the primary focuses is on effective pest management for enhanced crop productivity. Despite newer and potent chemicals as pesticides, there are still substantial crop losses, and if by any means this loss can be tackled; it will alleviate unwanted excessive use of chemical pesticides. Scientific surveys have already established that pesticides are not being utilized by the crops completely rather a significant amount remains unused due to various limiting factors such as leaching and bioconversion, etc., resulting in an adverse effect on human health and ecosystems. Concerted efforts from scientific diaspora toward newer and innovative strategies are already showing promise, and one such viable approach is controlled release systems (CRS) of pesticides. Moreover, to bring these smart formulations within the domain of current pesticide regulatory framework is still under debate. It is thus, paramount to discuss the pros and cons of this new technology vis-à-vis the conventional agrarian methods. This review deliberates on the developmental updates in this innovative field from the past decades and also appraises the challenges encumbered. Additionally, critical information and the foreseeable research gaps in this emerging area are highlighted.
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Affiliation(s)
- Amrita Singh
- Water Analysis Laboratory, Nanomaterials Toxicology Group, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Toxicology Research Campus, Lucknow 226001, Uttar Pradesh, India
| | - Nitesh Dhiman
- Water Analysis Laboratory, Nanomaterials Toxicology Group, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Toxicology Research Campus, Lucknow 226001, Uttar Pradesh, India
| | - Aditya Kumar Kar
- Water Analysis Laboratory, Nanomaterials Toxicology Group, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Toxicology Research Campus, Lucknow 226001, Uttar Pradesh, India
| | - Divya Singh
- Water Analysis Laboratory, Nanomaterials Toxicology Group, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India
| | - Mahaveer Prasad Purohit
- Water Analysis Laboratory, Nanomaterials Toxicology Group, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Toxicology Research Campus, Lucknow 226001, Uttar Pradesh, India
| | - Debabrata Ghosh
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Toxicology Research Campus, Lucknow 226001, Uttar Pradesh, India; Immunotoxicolgy Laboratory, Food Drug and Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research, Lucknow 226001, Uttar Pradesh, India
| | - Satyakam Patnaik
- Water Analysis Laboratory, Nanomaterials Toxicology Group, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Toxicology Research Campus, Lucknow 226001, Uttar Pradesh, India.
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Zhang M, Zhu Z, Yuan S, Wang S, Yang C, Dwivedi P, Si T, Xu RX. One-step microencapsulation and spraying of pesticide formulations for improved adhesion and sustained release. J Microencapsul 2019; 36:649-658. [DOI: 10.1080/02652048.2019.1665118] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Ming Zhang
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Zhiqiang Zhu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Shuai Yuan
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Shiyu Wang
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Chaoyu Yang
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Pankaj Dwivedi
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Ting Si
- Department of Modern Mechanics, University of Science and Technology of China, Hefei, PR China
| | - Ronald X. Xu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
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The Influence of a Water Absorbing Geocomposite on Soil Water Retention and Soil Matric Potential. WATER 2019. [DOI: 10.3390/w11081731] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Climate change induces droughts that are becoming more intensive and more frequent than ever before. Most of the available forecast tools predict a further significant increase in the risk of drought, which indicates the need to prepare solutions to mitigate its effects. Growing water scarcity is now one of the world’s leading challenges. In agriculture and environmental engineering, in order to increase soil water retention, soil additives are used. In this study, the influence of a newly developed water absorbing geocomposite (WAG) on soil water retention and soil matric potential was analyzed. WAG is a special element made from geotextile which is wrapped around a synthetic skeleton with a superabsorbent polymer placed inside. To describe WAG’s influence on soil water retention and soil matric potential, coarse sand, loamy sand, and sandy loam soils were used. WAG in the form of a mat was used in the study as a treatment. Three kinds of samples were prepared for every soil type. Control samples and samples with WAG treatment placed at depths of 10 cm and 20 cm were examined in a test container of 105 × 70 × 50 cm dimensions. The samples had been watered and drained, and afterwards, the soil surface was heated by lamps of 1100 W total power constantly for 72 h. Soil matric potential was measured by Irrometer field tensiometers at three depths. Soil moisture content was recorded at six depths: of 5, 9, 15, 19, 25, and 30 cm under the top of the soil surface with time-domain reflectometry (TDR) measurement devices. The values of soil moisture content and soil matric potential were collected in one-minute steps, and analyzed in 24-h-long time steps: 24, 48, and 72 h. The samples with the WAG treatment lost more water than the control samples. Similarly, lower soil matric potential was noted in the samples with the WAG than in the control samples. However, after taking into account the water retained in the WAG, it appeared that the samples with the WAG had more water easily available for plants than the control samples. It was found that the mechanism of a capillary barrier affected higher water loss from soil layers above those where the WAG had been placed. The obtained results of water loss depend on the soil type used in the profile.
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Chen L, Zhou X, Lin G, Chen H, Hao L, Zhou H. Synthesis of pH‐responsive isolated soy protein/carboxymethyl chitosan microspheres for sustained pesticide release. J Appl Polym Sci 2019. [DOI: 10.1002/app.48358] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Long Chen
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical EngineeringZhongkai University of Agriculture and Engineering Guangzhou People's Republic of China
| | - Xinhua Zhou
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical EngineeringZhongkai University of Agriculture and Engineering Guangzhou People's Republic of China
| | - Guanquan Lin
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical EngineeringZhongkai University of Agriculture and Engineering Guangzhou People's Republic of China
| | - Huayao Chen
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical EngineeringZhongkai University of Agriculture and Engineering Guangzhou People's Republic of China
| | - Li Hao
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical EngineeringZhongkai University of Agriculture and Engineering Guangzhou People's Republic of China
| | - Hongjun Zhou
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical EngineeringZhongkai University of Agriculture and Engineering Guangzhou People's Republic of China
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35
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36
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Smart release-control of microencapsulated ingredients from milk protein tablets using spray drying and heating. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2019.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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37
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Babaladimath G, Badalamoole V. Silver nanocomposite hydrogel of Gum Ghatti with potential antibacterial property. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2019.1619462] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Gangadhar Babaladimath
- Department of Post-Graduate Studies & Research in Chemistry, Mangalore University, Mangalagangothri, Karnataka, India
- Department of Chemistry, K.L.E Society’s Raja Lakhamagouda Science Institute, Belagavi, Karnataka, India
| | - Vishalakshi Badalamoole
- Department of Post-Graduate Studies & Research in Chemistry, Mangalore University, Mangalagangothri, Karnataka, India
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Namazi H, Hasani M, Yadollahi M. Antibacterial oxidized starch/ZnO nanocomposite hydrogel: Synthesis and evaluation of its swelling behaviours in various pHs and salt solutions. Int J Biol Macromol 2019; 126:578-584. [DOI: 10.1016/j.ijbiomac.2018.12.242] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 12/18/2018] [Accepted: 12/26/2018] [Indexed: 10/27/2022]
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Ecotoxicological Properties of Tulipalin A-Based Superabsorbents versus Conventional Superabsorbent Hydrogels. ADVANCES IN POLYMER TECHNOLOGY 2019. [DOI: 10.1155/2019/2947152] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The Phytotoxicological Aspects of a Novel Superabsorbent/Hydrogels: poly(acrylamide-co-sodium 4-hydroxy-2-methylenebutanoate), prepared from renewable monomer Tulipalin A, on the growth and development of monocotyledonous Avena sativa and dicotyledonous Raphanus sativus, was investigated and compared with the effect of borate-crosslinked poly(vinyl alcohol), poly(acrylamide), and poly(acrylamide-co-sodium acrylate) conventional hydrogels. Tulipalin A-based superabsorbent hydrogels revealed superior properties in terms of the combination of the tested properties. The results confirmed excellent suitability of Tulipalin A-based hydrogels for application as reservoirs of water during plant stress condition. Values of fresh matter (yield) and shoot height of the examined plants growing in soil amended with these hydrogels were ca 10% higher than those of plants growing in soil without hydrogels. Reference borate-crosslinked PVA hydrogels (containing increasing amount of borax cross-linker) revealed harmful effect on plants. The negative effect was observed on most of the investigated properties, increasing with content of the hydrogel in soil and concentration of the borax in it.
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40
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Rychter P, Lewicka K, Pastusiak M, Domański M, Dobrzyński P. PLGA–PEG terpolymers as a carriers of bioactive agents, influence of PEG blocks content on degradation and release of herbicides into soil. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.01.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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41
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Wang B, Zhang S, Wang Y, Si B, Cheng D, Liu L, Lu Y. Regenerated Antheraea pernyi Silk Fibroin/Poly( N-isopropylacrylamide) Thermosensitive Composite Hydrogel with Improved Mechanical Strength. Polymers (Basel) 2019; 11:E302. [PMID: 30960286 PMCID: PMC6419200 DOI: 10.3390/polym11020302] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 01/23/2019] [Accepted: 02/07/2019] [Indexed: 02/05/2023] Open
Abstract
At present, Antheraea pernyi silk fibroin (ASF) has attracted research efforts to investigate it as a raw material for fabrication of biomedical devices because of its superior cytocompatibility. Nevertheless, native ASF is not easily processed into a hydrogel without any crosslinking agent, and a single hydrogel shows poor mechanical properties. In this paper, a series of ASF/poly (N-isopropylacrylamide) (PNIPAAm) composite hydrogels with different ASF contents were manufactured by a simple in situ polymerization method without any crosslinking agent. Meanwhile, the structures, morphologies and thermal properties of composite hydrogels were investigated by XRD, FTIR, SEM, DSC and TGA, respectively. The results indicate that the secondary structure of silk in the composite hydrogel can be controlled by changing the ASF content and the thermal stability of composite hydrogels is enhanced with an increase in crystalline structure. The composite hydrogels showed similar lower critical solution temperatures (LCST) at about 32 °C, which matched well with the LCST of PNIPAAm. Finally, the obtained thermosensitive composite hydrogels exhibited enhanced mechanical properties, which can be tuned by varying the content of ASF. This strategy to prepare an ASF-based responsive composite hydrogel with enhanced mechanical properties represents a valuable route for developing the fields of ASF, and, furthermore, their attractive applications can meet the needs of different biomaterial fields.
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Affiliation(s)
- Boxiang Wang
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
- Key Laboratory of Functional Textile Materials, Liaoning Province, Eastern Liaoning University, Dandong 118003, China.
| | - Song Zhang
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
| | - Yifan Wang
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
| | - Bo Si
- School of Chemical Engineering, Eastern Liaoning University, Eastern Liaoning University, Dandong 118003, China.
| | - Dehong Cheng
- Key Laboratory of Functional Textile Materials, Liaoning Province, Eastern Liaoning University, Dandong 118003, China.
- School of Chemical Engineering, Eastern Liaoning University, Eastern Liaoning University, Dandong 118003, China.
| | - Li Liu
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
| | - Yanhua Lu
- Key Laboratory of Functional Textile Materials, Liaoning Province, Eastern Liaoning University, Dandong 118003, China.
- School of Chemical Engineering, Eastern Liaoning University, Eastern Liaoning University, Dandong 118003, China.
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42
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Berry DR, Díaz BK, Durand-Silva A, Smaldone RA. Radical free crosslinking of direct-write 3D printed hydrogels through a base catalyzed thiol-Michael reaction. Polym Chem 2019. [DOI: 10.1039/c9py00953a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
3D printed micelle-based hydrogels were mechanically stabilized and crosslinked through the base catalyzed thiol-Michael addition in PBS buffer, without the use of potentially cytotoxic radical chemistry.
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Affiliation(s)
- Danielle R. Berry
- Department of Chemistry and Biochemistry
- The University of Texas at Dallas
- Richardson
- USA
| | - Brisa K. Díaz
- Department of Chemistry and Biochemistry
- The University of Texas at Dallas
- Richardson
- USA
| | | | - Ronald A. Smaldone
- Department of Chemistry and Biochemistry
- The University of Texas at Dallas
- Richardson
- USA
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43
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Singh A, Sarkar DJ, Mittal S, Dhaka R, Maiti P, Singh A, Raghav T, Solanki D, Ahmed N, Singh SB. Zeolite reinforced carboxymethyl cellulose-Na+
-g-cl
-poly(AAm) hydrogel composites with pH responsive phosphate release behavior. J Appl Polym Sci 2018. [DOI: 10.1002/app.47332] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Anupama Singh
- Division of Agricultural Chemicals; ICAR-Indian Agricultural Research Institute; New Delhi India
| | - Dhruba Jyoti Sarkar
- Division of Agricultural Chemicals; ICAR-Indian Agricultural Research Institute; New Delhi India
| | - Shailja Mittal
- Division of Agricultural Chemicals; ICAR-Indian Agricultural Research Institute; New Delhi India
| | - Rashmi Dhaka
- Division of Agricultural Chemicals; ICAR-Indian Agricultural Research Institute; New Delhi India
| | - Pushkar Maiti
- Division of Agricultural Chemicals; ICAR-Indian Agricultural Research Institute; New Delhi India
| | - Aarushi Singh
- Division of Agricultural Chemicals; ICAR-Indian Agricultural Research Institute; New Delhi India
| | - Taruna Raghav
- Division of Agricultural Chemicals; ICAR-Indian Agricultural Research Institute; New Delhi India
| | - Dilip Solanki
- Division of Soil Science and Agricultural Chemistry; ICAR-Indian Agricultural Research Institute; New Delhi India
| | - Nayan Ahmed
- Division of Soil Science and Agricultural Chemistry; ICAR-Indian Agricultural Research Institute; New Delhi India
| | - Shashi Bala Singh
- Division of Agricultural Chemicals; ICAR-Indian Agricultural Research Institute; New Delhi India
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44
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Synthesis of polyvinyl alcohol/CuO nanocomposite hydrogel and its application as drug delivery agent. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2477-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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45
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Zhang H, Qin H, Li L, Zhou X, Wang W, Kan C. Preparation and Characterization of Controlled-Release Avermectin/Castor Oil-Based Polyurethane Nanoemulsions. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6552-6560. [PMID: 28562041 DOI: 10.1021/acs.jafc.7b01401] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Avermectin (AVM) is a low-toxic and high-active biopesticide, but it can be easily degraded by UV light. In this paper, biodegradable castor oil-based polyurethanes (CO-PU) are synthesized and used as carriers to fabricate a new kind of AVM/CO-PU nanoemulsion through an emulsion solvent evaporation method, and the chemical structure, colloidal property, AVM loading capacity, controlled-release behavior, foliar adhesion, and photostability of the AVM/CO-PU drug delivery systems are investigated. Results show that AVM is physically encapsulated in the CO-PU carrier nanospheres, the diameter of the AVM/CO-PU nanoparticles is <50 nm, and the AVM/CO-PU films are flat and smooth without any AVM aggregate. The drug loading capacity is up to 42.3 wt % with a high encapsulation efficiency of >85%. The release profiles indicate that the release rate is relatively high at the early stage and then slows, which can be adjusted by loaded AVM content, temperature, and pH of the release medium. The foliar pesticide retention of the AVM/CO-PU nanoemulsions is improved, and the photolysis rate of AVM in the AVM/CO-PU nanoparticles is significantly slower than that of the free AVM. A release mechanism of the AVM/CO-PU nanoemulsions is proposed, which is controlled by both diffusion and matrix erosion.
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Affiliation(s)
- Hong Zhang
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| | - He Qin
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Lingxiao Li
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Xiaoteng Zhou
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Wei Wang
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Chengyou Kan
- Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education , Tsinghua University , Beijing 100084 , People's Republic of China
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46
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Cubic polyhedral oligomeric silsesquioxane nano-cross-linked hybrid hydrogels: Synthesis, characterization, swelling and dye adsorption properties. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.05.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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47
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Nada AA, Arul MR, Ramos DM, Kroneková Z, Mosnáček J, Rudraiah S, Kumbar SG. Bioactive polymeric formulations for wound healing. POLYM ADVAN TECHNOL 2018; 29:1815-1825. [PMID: 30923437 DOI: 10.1002/pat.4288] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ricinoleic acid (RA) has potential to promote wound healing because of its analgesic and anti-inflammatory properties. This study investigates the synthesis and characterization of RA liposomes infused in a hydrogel for topical application. Lecithin liposomes containing RA were prepared and incorporated into a chitosan solution and were subsequently cross-linked with dialdehyde β-cyclodextrin (Di-β-CD). Chitosan/Di-β-CD concentrations and reaction temperatures were varied to alter gelation time, water content, and mechanical properties of the hydrogel in an effort to obtain a wide range of RA release profiles. Hydrogel cross-linking was confirmed by spectroscopy, and liposome and carrier hydrogel morphology via microscopy. Chitosan, Di-β-CD, and liposome concentrations within the formulation affected the extent of matrix swelling, mechanical strength, and pore and overall morphology. Higher cross-linking density of the hydrogel led to lower water uptake and slower release rate of RA. Optimized formulations resulted in a burst release of RA followed by a steady release pattern accounting for 80% of the encapsulated RA over a period of 48 hours. However, RA concentrations above 0.1 mg/mL were found to be cytotoxic to fibroblast cultures in vitro because of the oily nature of RA. These formulations promoted wound healing when used to treat full thickness skin wounds (2 cm2) in Wister male rats. The wound contraction rates were significantly higher compared to a commercially available topical cream after a time period of 21 days. Histopathological analysis of the RA-liposomal chitosan hydrogel group showed that the epidermis, dermis, and subcutaneous skin layers displayed an accelerated yet normal healing compared to control group.
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Affiliation(s)
- Ahmed A Nada
- Pretreatment & Finishing of Cellulose Based Textiles Dept., National Research Centre, Dokki, Giza, Egypt.,Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 84541 Bratislava, Slovakia.,Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA
| | - Michael R Arul
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA
| | - Daisy M Ramos
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA
| | - Zuzana Kroneková
- Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 84541 Bratislava, Slovakia
| | - Jaroslav Mosnáček
- Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 84541 Bratislava, Slovakia
| | - Swetha Rudraiah
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Saint Joseph, Hartford, CT, USA
| | - Sangamesh G Kumbar
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA.,Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA
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48
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Lejcuś K, Śpitalniak M, Dąbrowska J. Swelling Behaviour of Superabsorbent Polymers for Soil Amendment under Different Loads. Polymers (Basel) 2018; 10:E271. [PMID: 30966306 PMCID: PMC6414986 DOI: 10.3390/polym10030271] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 02/21/2018] [Accepted: 03/03/2018] [Indexed: 12/03/2022] Open
Abstract
One of the most important among the numerous applications of superabsorbent polymers (SAPs), also known as hydrogels, is soil improvement and supporting plant vegetation in agriculture and environmental engineering. Currently, when water scarcity involves water stress, they are becoming still more commonly used for water retention in soil. As it turns out, one of the major factors influencing the superabsorbent polymers water retention capacity (WRC) is the load of soil. The study presents test results of absorbency under load (AUL) of SAPs. The object of the analysis was cross-linked copolymer of acrylamide and potassium acrylate, of a granulation of 0.50⁻3.15 mm. The authors analysed the water absorption capacity of the superabsorbent polymers under loads characteristic for 3 different densities of soil (1.3 g∙cm-3, 0.9 g∙cm-3, 0.5 g∙cm-3) and three different depths of application (10 cm, 20 cm, and 30 cm). Soil load and bulk densities were simulated by using weights. The experiments were conducted with a Mecmesin Multitest 2.5-xt apparatus. The obtained results demonstrate a very significant reduction in water absorption capacity by SAP under load. For a 30 cm deep layer of soil of bulk density of 1.3 g∙cm-3, after 1 h, this value amounted to 5.0 g∙g-1, and for the control sample without load, this value amounted to more than 200 g∙g-1. For the lowest load in the experiment, which was 0.49 kPa (10 cm deep layer of soil of a bulk density of 0.5 g∙cm-3), this value was 33.0 g∙g-1 after 60 min. Loads do not only limit the volume of the swelling superabsorbent polymer but they also prolong the swelling time. The soil load caused a decrease in the absorption capacity from 338.5 g∙g-1 to 19.3 g∙g-1, as well as a prolongation of the swelling time. The rate parameter (time required to reach 63% of maximum absorption capacity) increased from 63 min for the control sample to more than 300 min for the largest analysed load of 3.83 kPa. The implications of soil load on superabsorbent polymer swelling are crucial for its usage and thus for the soil system. This knowledge might be employed for the more effective usage of superabsorbent polymers in agriculture and environmental engineering, in which they are commonly used to retain water and to support plant growth.
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Affiliation(s)
- Krzysztof Lejcuś
- Institute of Environmental Engineering, Wrocław University of Environmental and Life Sciences, 50-363 Wroclaw, Poland.
| | - Michał Śpitalniak
- Institute of Environmental Engineering, Wrocław University of Environmental and Life Sciences, 50-363 Wroclaw, Poland.
| | - Jolanta Dąbrowska
- Institute of Environmental Engineering, Wrocław University of Environmental and Life Sciences, 50-363 Wroclaw, Poland.
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49
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Zaharia A, Radu AL, Iancu S, Florea AM, Sandu T, Minca I, Fruth-Oprisan V, Teodorescu M, Sarbu A, Iordache TV. Bacterial cellulose-poly(acrylic acid-co-N,N′-methylene-bis-acrylamide) interpenetrated networks for the controlled release of fertilizers. RSC Adv 2018; 8:17635-17644. [PMID: 35542079 PMCID: PMC9080491 DOI: 10.1039/c8ra01733f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 05/05/2018] [Indexed: 11/22/2022] Open
Abstract
In this study, composite hydrogels with interpenetrated polymer networks (IPNs), based on bacterial cellulose (BC) and poly(acrylic acid-co-N,N′-methylene-bis-acrylamide) (PAA), were synthesized by radical polymerization and characterized herein for the first time. Liquid fertilizer (LF) formulations, containing potassium, phosphorus, ammonium oxides and micronutrients, were encapsulated directly into the IPNs of the composite hydrogels during synthesis. Thermal analyses and scanning electron microscopy of control and composite xerogels highlighted the formation of IPNs between BC and PAA. Swelling determinations confirmed the influence of the crosslinker and of the liquid fertilizer concentration upon the density of the IPNs. Further rheology studies and release profiles indicated how the presence of BC and the increase of the crosslinking density of IPNs improved the mechanical strength and the release profile of LF for the innovative composite BC-PAA hydrogels. Results regarding the fertilizer release indicated that the presence of the BC led to a more controlled liberation of the fertilizer proving that this new formulation is potentially viable for application in agricultural practices. In this study, composite hydrogels with interpenetrated polymer networks (IPNs), based on bacterial cellulose (BC) and poly(acrylic acid-co-N,N′-methylene-bis-acrylamide) (PAA) were synthesized by radical polymerization.![]()
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50
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Caccavo D, Cascone S, Apicella P, Lamberti G, Barba AA. HPMC-based granules for prolonged release of phytostrengtheners in agriculture. CHEM ENG COMMUN 2017. [DOI: 10.1080/00986445.2017.1362398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- D. Caccavo
- Department of Industrial Engineering, University of Salerno, Fisciano (SA), Italy
| | - S. Cascone
- Department of Industrial Engineering, University of Salerno, Fisciano (SA), Italy
| | - P. Apicella
- Department of Industrial Engineering, University of Salerno, Fisciano (SA), Italy
| | - G. Lamberti
- Department of Industrial Engineering, University of Salerno, Fisciano (SA), Italy
| | - A. A. Barba
- Department of Pharmacy, University of Salerno, Fisciano (SA), Italy
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