1
|
Liang Q, Hou C, Tan Y, Wei N, Sun S, Zhang S, Feng J. Construction and biological effects of a redox-enzyme dual-responsive lufenuron nano-controlled release formulation. PEST MANAGEMENT SCIENCE 2024; 80:1314-1324. [PMID: 37903714 DOI: 10.1002/ps.7862] [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: 08/27/2023] [Revised: 10/19/2023] [Accepted: 10/31/2023] [Indexed: 11/01/2023]
Abstract
BACKGROUND Pesticide formulations based on nanotechnology can effectively improve the efficiency of pesticide utilization and reduce pesticide residues in the environment. In this study, mesoporous silica nanoparticles containing disulfide bonds were synthesized by the sol-gel method, carboxylated and adsorbed with lufenuron, and grafted with cellulose to obtain a lufenuron-loaded nano-controlled release formulation (Luf@MSNs-ss-cellulose). RESULTS The structure and properties of Luf@MSNs-ss-cellulose were characterized. The results showed that Luf@MSNs-ss-cellulose exhibits a regular spherical shape with 12.41% pesticide loading. The highest cumulative release rate (73.46%) of this pesticide-loaded nanoparticle was observed at 7 days in the environment of glutathione and cellulase, which shows redox-enzyme dual-responsive performance. As a result of cellulose grafting, Luf@MSNs-ss-cellulose had a small contact angle and high adhesion work on corn leaves, indicating good wetting and adhesion properties. After 14 days of spraying with 20 mg L-1 formulations in the long-term control efficacy experiment, the mortality of Luf@MSNs-ss-cellulose against Ostrinia furnacalis larvae (56.67%) was significantly higher than that of commercial Luf@EW (36.67%). Luf@MSNs-ss-cellulose is safer for earthworms and L02 cells. CONCLUSION The nano-controlled release formulation obtained in this study achieved intelligent pesticide delivery in time and space under the environmental stimulation of glutathione and cellulase, providing an effective method for the development of novel pesticide delivery systems. © 2023 Society of Chemical Industry.
Collapse
Affiliation(s)
- Qianwei Liang
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Chaoqun Hou
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Yifei Tan
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Nuo Wei
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Shaoyang Sun
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Shengfu Zhang
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Jianguo Feng
- College of Plant Protection, Yangzhou University, Yangzhou, China
| |
Collapse
|
2
|
Pu X, Cai W, Chen H, Yang F, Mu X. Optimizing the method for removing MSNs templates using an ionic liquid ([C 4mim]Cl). NANOTECHNOLOGY 2024; 35:125601. [PMID: 38100836 DOI: 10.1088/1361-6528/ad1645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 12/15/2023] [Indexed: 12/17/2023]
Abstract
The key step in preparing mesoporous silica is to remove the organic template agent, and the most common method used to achieve this goal is high-temperature calcination. However, this method has many disadvantages, one of which is that it reduces the silanol density on the surface of mesoporous silica, which affects its subsequent modification. Ionic liquids (ILs) are often used as extractants. In this work, the 1-butyl-3-methylimidazolium chloride ([C4mim]Cl) IL is considered, and the effects of its concentration, reaction temperature, and reaction time as well as HCl concentration on the extraction rate and silanol density were investigated using an IL extraction template agent (cetyl trimethyl ammonium bromide (CTAB)). The results show that an IL concentration of 10%, a reaction temperature of 120 °C, a reaction time of 12 h, and an HCl concentration of 1% are the best reaction parameters; with these parameters, the extraction rate and the silanol density were found to be 93.19% and 2.23%, respectively. The silanol density of mesoporous silica treated by calcination is only 0.81%. A higher silanol density provides more reaction sites, so that the modified mesoporous silica treated with the IL can be loaded with more Zn ions.
Collapse
Affiliation(s)
- Xia Pu
- School of Chemistry and Chemical Engineering , Zhongkai University of Agriculture and Engineering, Guangzhou 510225, People's Republic of China
| | - Wanling Cai
- School of Chemistry and Chemical Engineering , Zhongkai University of Agriculture and Engineering, Guangzhou 510225, People's Republic of China
| | - Huayao Chen
- School of Chemistry and Chemical Engineering , Zhongkai University of Agriculture and Engineering, Guangzhou 510225, People's Republic of China
| | - Fujie Yang
- School of Chemistry and Chemical Engineering , Zhongkai University of Agriculture and Engineering, Guangzhou 510225, People's Republic of China
| | - Xiaomei Mu
- School of Chemistry and Chemical Engineering , Zhongkai University of Agriculture and Engineering, Guangzhou 510225, People's Republic of China
| |
Collapse
|
3
|
Xiao D, Wu H, Zhang Y, Kang J, Dong A, Liang W. Advances in stimuli-responsive systems for pesticides delivery: Recent efforts and future outlook. J Control Release 2022; 352:288-312. [PMID: 36273530 DOI: 10.1016/j.jconrel.2022.10.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 10/15/2022] [Accepted: 10/17/2022] [Indexed: 11/08/2022]
Abstract
Effective pest management for enhanced crop output is one of the primary goals of establishing sustainable agricultural practices in the world. Pesticides are critical in preventing biological disasters, ensuring crop productivity, and fostering sustainable agricultural production growth. Studies showed that crops are unable to properly utilize pesticides because of several limiting factors, such as leaching and bioconversion, thereby damaging ecosystems and human health. In recent years, stimuli-responsive systems for pesticides delivery (SRSP) by nanotechnology demonstrated excellent promise in enhancing the effectiveness and safety of pesticides. SRSP are being developed with the goal of delivering precise amounts of active substances in response to biological needs and environmental factors. An in-depth analysis of carrier materials, design fundamentals, and classification of SRSP were provided. The adhesion of SRSP to crop tissue, absorption, translocation in and within plants, mobility in the soil, and toxicity were also discussed. The problems and shortcomings that need be resolved to accelerate the actual deployment of SRSP were highlighted in this review.
Collapse
Affiliation(s)
- Douxin Xiao
- College of Chemistry and Chemical Engineering, Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, Inner Mongolia University, Hohhot 010021, PR China
| | - Haixia Wu
- College of Chemistry and Chemical Engineering, Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, Inner Mongolia University, Hohhot 010021, PR China
| | - Yanling Zhang
- College of Chemistry and Chemical Engineering, Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, Inner Mongolia University, Hohhot 010021, PR China
| | - Jing Kang
- College of Chemistry and Chemical Engineering, Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, Inner Mongolia University, Hohhot 010021, PR China
| | - Alideertu Dong
- College of Chemistry and Chemical Engineering, Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, Inner Mongolia University, Hohhot 010021, PR China.
| | - Wenlong Liang
- Institute of Pesticide and Environmental Toxicology, the Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agricultural and Biotechnology, Zhejiang University, Hangzhou 310058, PR China.
| |
Collapse
|
4
|
Feng J, Chen Z, Chen W, Sun L, Yang J, He K, Dong S, Yuan S. Facile pathway to construct mesoporous silica nanoparticles loaded with pyraclostrobin: Physicochemical properties, antifungal activity, and biosafety. PEST MANAGEMENT SCIENCE 2022; 78:2332-2341. [PMID: 35246931 DOI: 10.1002/ps.6859] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 02/19/2022] [Accepted: 03/05/2022] [Indexed: 05/18/2023]
Abstract
BACKGROUND A controlled-release formulation based on mesoporous silica nanoparticles (MSNs) provides an effective way for reducing pesticide use and protecting the ecological environment. In this study, MSNs loaded with pyraclostrobin (PYR@MSNs) were prepared using a one-pot method. RESULTS The characteristics of PYR@MSNs were systematically investigated, including morphology, loading content, ultraviolet (UV) resistance, release behavior, control effects against pathogens, and safety to nontarget organisms. The results show that the prepared PYR@MSNs presented characteristics of regular spherical shapes, uniform particle size (200 nm), high drug loading (38.9%), and enhanced UV resistance. Compared with traditional formulation, PYR@MSNs exhibited improved control effects against Fusarium graminearum, an extended control period, and lower toxicity to zebrafish, earthworms and BEAS-2B cells. CONCLUSIONS This research will facilitate the development of efficient and safe pesticide delivery systems. The PYR@MSNs has showed its potential as a new controlled-release formulation with increased efficacy and is expected to benefit the sustainable development of agriculture. © 2022 Society of Chemical Industry.
Collapse
Affiliation(s)
- Jianguo Feng
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Zhiyang Chen
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Wang Chen
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Li Sun
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Jinghan Yang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Kangli He
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Sa Dong
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Shuzhong Yuan
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| |
Collapse
|
5
|
Singh G, Ramadass K, Sooriyakumar P, Hettithanthri O, Vithange M, Bolan N, Tavakkoli E, Van Zwieten L, Vinu A. Nanoporous materials for pesticide formulation and delivery in the agricultural sector. J Control Release 2022; 343:187-206. [DOI: 10.1016/j.jconrel.2022.01.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 12/25/2022]
|
6
|
Kong XP, Zhang BH, Wang J. Multiple Roles of Mesoporous Silica in Safe Pesticide Application by Nanotechnology: A Review. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:6735-6754. [PMID: 34110151 DOI: 10.1021/acs.jafc.1c01091] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Pollution related to pesticides has become a global problem due to their low utilization and non-targeting application, and nanotechnology has shown great potential in promoting sustainable agriculture. Nowadays, mesoporous silica-based nanomaterials have garnered immense attention for improving the efficacy and safety of pesticides due to their distinctive advantages of low toxicity, high thermal and chemical stability, and particularly size tunability and versatile functionality. Based on the introduction of the structure and synthesis of different types of mesoporous silica nanoparticles (MSNs), the multiple roles of mesoporous silica in safe pesticide application using nanotechnology are discussed in this Review: (i) as nanocarrier for sustained/controlled delivery of pesticides, (ii) as adsorbent for enrichment or removal of pesticides in aqueous media, (iii) as support of catalysts for degradation of pesticide contaminants, and (iv) as support of sensors for detection of pesticides. Several scientific issues, strategies, and mechanisms regarding the application of MSNs in the pesticide field are presented, with their future directions discussed in terms of their environmental risk assessment, in-depth mechanism exploration, and cost-benefit consideration for their continuous development. This Review will provide critical information to related researchers and may open up their minds to develop new advances in pesticide application.
Collapse
Affiliation(s)
- Xiang-Ping Kong
- College of Chemistry and Pharmacy, Qingdao Agricultural University, Qingdao 266109, Shandong, P. R. China
| | - Bao-Hua Zhang
- College of Chemistry and Pharmacy, Qingdao Agricultural University, Qingdao 266109, Shandong, P. R. China
| | - Juan Wang
- College of Chemistry and Pharmacy, Qingdao Agricultural University, Qingdao 266109, Shandong, P. R. China
| |
Collapse
|
7
|
Mesoporous Silica Platforms with Potential Applications in Release and Adsorption of Active Agents. Molecules 2020; 25:molecules25173814. [PMID: 32825791 PMCID: PMC7503268 DOI: 10.3390/molecules25173814] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/13/2020] [Accepted: 08/20/2020] [Indexed: 01/01/2023] Open
Abstract
In recent years, researchers focused their attention on mesoporous silica nanoparticles (MSNs) owing to the considerable advancements of the characterization methods, especially electron microscopy methods, which allowed for a clear visualization of the pore structure and the materials encapsulated within the pores, along with the X-ray diffraction (small angles) methods and specific surface area determination by Brunauer–Emmett–Teller (BET) technique. Mesoporous silica gained important consideration in biomedical applications thanks to its tunable pore size, high surface area, surface functionalization possibility, chemical stability, and pore nature. Specifically, the nature of the pores allows for the encapsulation and release of anti-cancer drugs into tumor tissues, which makes MSN ideal candidates as drug delivery carriers in cancer treatment. Moreover, the inner and outer surfaces of the MSN provide a platform for further functionalization approaches that could enhance the adsorption of the drug within the silica network and the selective targeting and controlled release to the desired site. Additionally, stimuli-responsive mesoporous silica systems are being used as mediators in cancer therapy, and through the release of the therapeutic agents hosted inside the pores under the action of specific triggering factors, it can selectively deliver them into tumor tissues. Another important application of the mesoporous silica nanomaterials is related to its ability to extract different hazardous species from aqueous media, some of these agents being antibiotics, pesticides, or anti-tumor agents. The purpose of this paper is to analyze the methods of MSN synthesis and related characteristics, the available surface functionalization strategies, and the most important applications of MSN in adsorption as well as release studies. Owing to the increasing antibiotic resistance, the need for developing materials for antibiotic removal from wastewaters is important and mesoporous materials already proved remarkable performances in environmental applications, including removal or even degradation of hazardous agents such as antibiotics and pesticides.
Collapse
|
8
|
Chen H, Chen L, Shen Z, Zhou H, Hao L, Xu H, Zhou X. Synthesis of mesoporous silica post-loaded by methyl eugenol as an environment-friendly slow-release bio pesticide. Sci Rep 2020; 10:6108. [PMID: 32273543 PMCID: PMC7145810 DOI: 10.1038/s41598-020-63015-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 03/24/2020] [Indexed: 12/18/2022] Open
Abstract
Salicylaldimine, furfuralimine and benzaldehyde imine were adopted to modify mesoporous silica (MCM) respectively denoted as Sal-MCM, Fur-MCM and Ben-MCM before loading methyl eugenol (Me) for pesticide delivery. Me was adsorbed by Schiff base mesoporous silica without destructing regular hexagonal pore structure verified by the characterization results. DSC result implied that Me in amorphous state which was distributed in the pores of the mesoporous silica. The loading content of Me-Sal-MCM, Me-Fur-MCM and Me-Ben-MCM 67.89%, 73.34% and 73.84% which was higher than Me-MCM without modification (67.35%).Because the electrostatic interaction and π-π interaction between Schiff base and Me strengthened the adsorption capacity of the carrier. And the electrostatic interaction played a more important role in interaction between Me and Schiff base modified mesoporous silica. As a result, Schiff base modified sustained release system also has significantly longer sustained release time with a sequence of Me-Sal-MCM > Me-Ben-MCM > Me-Fur-MCM in release speed in negative correlation with the electric potential sequence. The behaviors of their sustained release performance can be fitted by First order kinetic model before Schiff base modification. After modification, their sustained release behaviors were consistent with Korsmeyer-Peppas equation with non-Fickian diffusion mechanism indicating that main impact on the release process after modification was no longer mainly controlled by the difference of the concentration. Finally, the highest lure rate of the modified MCM (Me-Fur-MCM) equals to the 73% of the pure Me due to its highest BET surface area and strongest interaction with Me among the three Schiff base modified samples. Therefore, the environment-friendly slow-release bio pesticide with long service life was prepared to reduce the damage on the environment caused by pesticide.
Collapse
Affiliation(s)
- Huayao Chen
- School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, P.R. China
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, Guangzhou, P.R. China
| | - Lishen Chen
- School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, P.R. China
| | - Zhichuan Shen
- School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, P.R. China
| | - Hongjun Zhou
- School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, P.R. China.
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, Guangzhou, P.R. China.
| | - Li Hao
- School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, P.R. China
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, Guangzhou, P.R. China
| | - Hua Xu
- School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, P.R. China
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, Guangzhou, P.R. China
| | - Xinhua Zhou
- School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, P.R. China.
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, Guangzhou, P.R. China.
| |
Collapse
|
9
|
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.
Collapse
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.
| |
Collapse
|
10
|
Enzyme cum pH dual-responsive controlled release of avermectin from functional polydopamine microcapsules. Colloids Surf B Biointerfaces 2020; 186:110699. [DOI: 10.1016/j.colsurfb.2019.110699] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 11/15/2019] [Accepted: 11/29/2019] [Indexed: 01/19/2023]
|
11
|
Camara MC, Campos EVR, Monteiro RA, do Espirito Santo Pereira A, de Freitas Proença PL, Fraceto LF. Development of stimuli-responsive nano-based pesticides: emerging opportunities for agriculture. J Nanobiotechnology 2019; 17:100. [PMID: 31542052 PMCID: PMC6754856 DOI: 10.1186/s12951-019-0533-8] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 09/14/2019] [Indexed: 01/23/2023] Open
Abstract
Pesticides and fertilizers are widely used to enhance agriculture yields, although the fraction of the pesticides applied in the field that reaches the targets is less than 0.1%. Such indiscriminate use of chemical pesticides is disadvantageous due to the cost implications and increasing human health and environmental concerns. In recent years, the utilization of nanotechnology to create novel formulations has shown great potential for diminishing the indiscriminate use of pesticides and providing environmentally safer alternatives. Smart nano-based pesticides are designed to efficiently delivery sufficient amounts of active ingredients in response to biotic and/or abiotic stressors that act as triggers, employing targeted and controlled release mechanisms. This review discusses the current status of stimuli-responsive release systems with potential to be used in agriculture, highlighting the challenges and drawbacks that need to be overcome in order to accelerate the global commercialization of smart nanopesticides.
Collapse
Affiliation(s)
- Marcela Candido Camara
- São Paulo State University - UNESP, Institute of Science and Technology, Sorocaba, SP, Brazil
| | - Estefânia Vangelie Ramos Campos
- São Paulo State University - UNESP, Institute of Science and Technology, Sorocaba, SP, Brazil
- Human and Natural Sciences Center, Federal University of ABC, Santo André, SP, Brazil
| | | | | | | | | |
Collapse
|
12
|
Chen L, Zhou H, Hao L, Chen H, Zhou X. Soy protein isolate-carboxymethyl cellulose conjugates with pH sensitivity for sustained avermectin release. ROYAL SOCIETY OPEN SCIENCE 2019; 6:190685. [PMID: 31417761 PMCID: PMC6689608 DOI: 10.1098/rsos.190685] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 06/24/2019] [Indexed: 05/09/2023]
Abstract
Carboxymethyl cellulose (CMC) was grafted onto the surface of soy protein isolate (SPI) to obtain soy protein isolate-carboxymethyl cellulose conjugate (SPC). Avermectin (AVM) was hydrophobically encapsulated as a model drug to obtain SPC@AVM. The reaction between SPI and CMC was confirmed by infrared spectroscopy, thermal analysis and SDS-PAGE electrophoresis. The results of scanning electron microscopy showed that the average particle size of the drug-loaded microspheres was 129 nm and the shape of microspheres changed from block to spherical after the addition of AVM. After encapsulation of AVM, the absolute value of zeta potential was greater than 15 mV, which indicated better stability. Compared to AVM solution, SPC@AVM showed more wettability on the leaf surface and the contact angle on the leaves decreased from 71.64° to 57.33°. The maximum liquid holding capacity increased by 41.41%, from 8.85 to 12.52 mg cm-2, which effectively reduced leaf loss. SPC@AVM also prevented UV photolysis, wherein the half-life was extended from 18 to 68 min when exposed to UV light. Moreover, toxicity tests showed that the encapsulation of AVM was beneficial to retain the insecticidal effect of AVM in the presence of ultraviolet light. The release rate of AVM showed pH responsiveness and the release rate under neutral conditions was faster than acidic and alkaline conditions. Moreover, the process conformed to the Weibull model.
Collapse
Affiliation(s)
| | - Hongjun Zhou
- Authors for correspondence: Hongjun Zhou e-mail:
| | | | | | - Xinhua Zhou
- Authors for correspondence: Xinhua Zhou e-mail:
| |
Collapse
|