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Samyn P, Cosemans P. Nanocellulose Grades with Different Morphologies and Surface Modification as Additives for Waterborne Epoxy Coatings. Polymers (Basel) 2024; 16:1095. [PMID: 38675014 PMCID: PMC11054773 DOI: 10.3390/polym16081095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/05/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024] Open
Abstract
While adding different micro- and nanocellulose types into epoxy coating formulations with waterborne phenalkamine crosslinker, effects on processing conditions and coating performance were systematically investigated. The variations in viscosity, thermal and thermomechanical properties, mechanical behavior, abrasive wear, water contact angles, and coating morphologies were evaluated. The selected additives include microcrystalline cellulose (MCC) at 1 to 10 wt.% and cellulose nanocrystals (CNC), cellulose nanofibers (CNF), cellulose microfibers (CMF), and hydrophobically modified cellulose microfibers (mCMF) at 0.1 to 1.5 wt.%. The viscosity profiles are determined by the inherent additive characteristics with strong shear thinning effects for epoxy/CNF, while the epoxy/mCMF provides lower viscosity and better matrix compatibility owing to the lubrication of encapsulated wax. The crosslinking of epoxy/CNF is favored and postponed for epoxy/(CNC, CMF, mCMF), as the stronger interactions between epoxy and CNF are confirmed by an increase in the glass transition temperature and reduction in the dampening factor. The mechanical properties indicate the highest hardness and impact strength for epoxy/CNF resulting in the lowest abrasion wear rates, but ductility enhances and wear rates mostly reduce for epoxy/mCMF together with hydrophobic protection. In addition, the mechanical reinforcement owing to the specific organization of a nanocellulose network at percolation threshold concentrations of 0.75 wt.% is confirmed by microscopic analysis: the latter results in a 2.6 °C (CNF) or 1.6 °C (CNC) increase in the glass transition temperature, 50% (CNF) or 20% (CNC) increase in the E modulus, 37% (CNF) or 32% (CNC) increase in hardness, and 58% (CNF) or 33% (CNC) lower abrasive wear compared to neat epoxy, while higher concentrations up to 1.5 wt.% mCMF can be added. This research significantly demonstrates that nanocellulose is directly compatible with a waterborne phenalkamine crosslinker and actively contributes to the crosslinking of waterborne epoxy coatings, changing the intrinsic glass transition temperatures and hardness properties, to which mechanical coating performance directly relates.
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Affiliation(s)
- Pieter Samyn
- Department of Innovations in Circular Economy and Renewable Materials, SIRRIS, 3001 Leuven, Belgium;
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2
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Wani SUD, Ali M, Mehdi S, Masoodi MH, Zargar MI, Shakeel F. A review on chitosan and alginate-based microcapsules: Mechanism and applications in drug delivery systems. Int J Biol Macromol 2023; 248:125875. [PMID: 37473899 DOI: 10.1016/j.ijbiomac.2023.125875] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 07/14/2023] [Accepted: 07/16/2023] [Indexed: 07/22/2023]
Abstract
Natural polymers, like chitosan and alginate have potential of appearance, as well as the changes and handling necessary to make it acceptable vehicle for the controlled release of medicines and biomolecules. Microcapsules are characterized as micrometer-sized particulate that can be employed to store chemicals within them. In the present review, we have discussed various advantages, components of microcapsules, release mechanisms, preparation methods, and their applications in drug delivery systems. The preparation methods exhibited strong encapsulation effectiveness and may be used in a wide range of pharmaceutical and biomedical applications. The major advantages of using the microencapsulation technique are, sustained and controlled delivery of drugs, drug targeting, improvement of shelf life, stabilization, immobilization of enzymes and microorganisms. As new biomaterials are developed for the body, they are better suited to the development of pharmaceutical systems than traditional pharmaceuticals because they are more reliable, biocompatible, biodegradable, and nontoxic. Furthermore, the designed microcapsules had been capable of shielding the essential components from hostile environments. More advanced techniques could be developed in the future to facilitate the formulation and applications of microcapsules and working with the pharmaceutical and medical industries.
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Affiliation(s)
- Shahid Ud Din Wani
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Srinagar 190006, India.
| | - Mohammad Ali
- Department of Pharmacy Practice, East Point College of Pharmacy, Bangalore 560027, India
| | - Seema Mehdi
- Department of Pharmacology, JSSCollege of Pharmacy, Mysuru 570015, India
| | - Mubashir Hussain Masoodi
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Srinagar 190006, India
| | - Mohammed Iqbal Zargar
- Department of Pharmaceutical Sciences, School of Applied Sciences and Technology, University of Kashmir, Srinagar 190006, India
| | - Faiyaz Shakeel
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
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3
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Kistaubayeva A, Abdulzhanova M, Zhantlessova S, Savitskaya I, Karpenyuk T, Goncharova A, Sinyavskiy Y. The Effect of Encapsulating a Prebiotic-Based Biopolymer Delivery System for Enhanced Probiotic Survival. Polymers (Basel) 2023; 15:polym15071752. [PMID: 37050363 PMCID: PMC10097185 DOI: 10.3390/polym15071752] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/30/2023] [Accepted: 02/01/2023] [Indexed: 04/03/2023] Open
Abstract
Orally delivered probiotics must survive transit through harsh environments during gastrointestinal (GI) digestion and be delivered and released into the target site. The aim of this work was to evaluate the survivability and delivery of gel-encapsulated Lactobacillus rhamnosus GG (LGG) to the colon. New hybrid symbiotic beads alginate/prebiotic pullulan/probiotic LGG were obtained by the extrusion method. The average size of the developed beads was 3401 µm (wet), 921 µm (dry) and the bacterial titer was 109 CFU/g. The morphology of the beads was studied by a scanning electron microscope, demonstrating the structure of the bacterial cellulose shell and loading with probiotics. For the first time, we propose adding an enzymatic extract of feces to an artificial colon fluid, which mimics the total hydrolytic activity of the intestinal microbiota. The beads can be digested by fecalase with cellulase activity, indicating intestinal release. The encapsulation of LGG significantly enhanced their viability under simulated GI conditions. However, the beads, in combination with the prebiotic, provided greater protection of bacteria, enhancing their survival and even increasing cell numbers in the capsules. These data suggest the promising prospects of coencapsulation as an innovative delivery method based on the inclusion of probiotic bacteria in a symbiotic matrix.
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Affiliation(s)
- Aida Kistaubayeva
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
| | - Malika Abdulzhanova
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
| | - Sirina Zhantlessova
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
| | - Irina Savitskaya
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
| | - Tatyana Karpenyuk
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
| | - Alla Goncharova
- Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
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Cui SF, Wang JW, Li HF, Fang R, Yu X, Lu YJ. Microencapsulation of Capsaicin in Chitosan Microcapsules: Characterization, Release Behavior, and Pesticidal Properties against Tribolium castaneum (Herbst). INSECTS 2022; 14:27. [PMID: 36661955 PMCID: PMC9864733 DOI: 10.3390/insects14010027] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/21/2022] [Accepted: 12/23/2022] [Indexed: 06/17/2023]
Abstract
Capsaicin is a capsaicinoid in hot chili peppers, with excellent antibacterial and antimicrobial activities and a good safety profile, but its poor solubility and instability restrict its effectiveness. This limitation may be mitigated by encapsulation. Herein, capsaicin microcapsules (CCMs) were prepared through layer-by-layer self-assembly, using chitosan and carboxymethyl chitosan as shell materials. The chemical and microstructure structural characterization was evaluated by the methods of Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The SEM indicated the microcapsules were irregular in shape with an average size of about 100 μm. The encapsulation had a high loading efficiency of 64.31%. FTIR and XRD revealed the absence of the interaction between the core and shell materials and the amorphous nature of the CCMs. The analysis results of the microcapsules' release behavior showed the burst release of capsaicin in 7 days and a slow progression afterward in three solutions, with the highest release properties in a basic solution, followed by acidic and neutral salt solutions. The entomotoxicity of CCMs was conducted against Tribolium castaneum (Herbst), and its efficacy was compared with pure capsaicin. The CCMs were found to be highly effective against this pest. The LC50 value for capsaicin and its microcapsules was 31.37 and 29.75 mg/kg on adults, respectively. According to these values, T. castaneum's development and reproduction were significantly inhibited compared with the control group. The excellent physicochemical characteristics and insecticidal performance show a high application value for integrated pest control.
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Affiliation(s)
| | | | | | | | | | - Yu-Jie Lu
- Correspondence: ; Tel./Fax: +86-21-85626711
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5
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Enciso-Huerta HA, Ruiz-Cabrera MA, Lopez-Martinez LA, Gonzalez-Garcia R, Martinez-Gutierrez F, Saavedra-Leos MZ. Evaluation of Two Active System Encapsulant Matrices with Quercetin and Bacillus clausii for Functional Foods. Polymers (Basel) 2022; 14:polym14235225. [PMID: 36501619 PMCID: PMC9741249 DOI: 10.3390/polym14235225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/17/2022] [Accepted: 11/22/2022] [Indexed: 12/04/2022] Open
Abstract
Currently, demand for functional foods is increasing in the public interest in order to improve life expectations and general health. Food matrices containing probiotic microorganisms and active compounds encapsulated into carrier agents are essential in this context. Encapsulation via the lyophilisation method is widely used because oxidation reactions that affect physicochemical and nutritional food properties are usually avoided. Encapsulated functional ingredients, such as quercetin and Bacillus clausii, using two carrier agents' matrices-I [inulin (IN), lactose (L) and maltodextrin (MX)] and II [arabic (A), guar (G), and xanthan (X) gums)]-are presented in this work. A D-optimal procedure involving 59 experiments was designed to evaluate each matrix's yield, viability, and antioxidant activity (AA). Matrix I (33.3 IN:33.3 L:33.3 MX) and matrix II (33.3 A:33.3 G:33.3 X) exhibited the best yield; viability of 9.7 log10 CFU/g and 9.73 log10 CFU/g was found in matrix I (using a ratio of 33.3 IN:33.3 L:33.3 MX) and matrix II (50 G:50 X), respectively. Results for the antioxidant capacity of matrix I (100 IN:0 L:0M X) and matrix II (0 A:50 G:50 X) were 58.75 and 55.54 (DPPH* scavenging activity (10 µg/mL)), respectively. Synergy between matrices I and II with use of 100IN:0L:OMX and 0A:50G:50X resulted in 55.4 log10 CFU/g viability values; the antioxidant capacity was 9. 52 (DPPH* scavenging activity (10 µg/mL). The present work proposes use of a carrier agent mixture to produce a functional ingredient with antioxidant and probiotic properties that exceed the minimum viability, 6.0 log10 CFU/g, recommended by the FAO/WHO (2002) to be probiotic, and that contributes to the recommended daily quercetin intake of 10-16 mg/day or inulin intake of 10-20 g/day and dietary fibre intake of 25-38 g per day.
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Affiliation(s)
- Hector Alfonso Enciso-Huerta
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, San Luis Potosí 78210, Mexico
| | - Miguel Angel Ruiz-Cabrera
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, San Luis Potosí 78210, Mexico
| | - Laura Araceli Lopez-Martinez
- Coordinación Académica Región Altiplano Oeste, Universidad Autónoma de San Luis Potosí, Salinas de Hidalgo 78600, Mexico
| | - Raul Gonzalez-Garcia
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, San Luis Potosí 78210, Mexico
| | - Fidel Martinez-Gutierrez
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, San Luis Potosí 78210, Mexico
| | - Maria Zenaida Saavedra-Leos
- Coordinación Académica Región Altiplano, Universidad Autónoma de San Luis Potosí, 11 Carretera Cedral Km, 5+600 Ejido San José de las Trojes, Matehuala 78700, Mexico
- Correspondence:
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Notova S, Cannac N, Rabagliati L, Touzard M, Mante J, Navon Y, Coche-Guérente L, Lerouxel O, Heux L, Imberty A. Building an Artificial Plant Cell Wall on a Lipid Bilayer by Assembling Polysaccharides and Engineered Proteins. ACS Synth Biol 2022; 11:3516-3528. [PMID: 36194500 DOI: 10.1021/acssynbio.2c00404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The cell wall constitutes a fundamental structural component of plant cells, providing them with mechanical resistance and flexibility. Mimicking this wall is a critical step in the conception of an experimental model of the plant cell. The assembly of cellulose/hemicellulose in the form of cellulose nanocrystals and xyloglucans as a representative model of the plant cell wall has already been mastered; however, these models lacked the pectin component. In this work, we used an engineered chimeric protein designed for bridging pectin to the cellulose/hemicellulose network, therefore achieving the assembly of complete cell wall mimics. We first engineered a carbohydrate-binding module from Ruminococcus flavefaciens able to bind oligogalacturonan, resulting in high-affinity polygalacturonan receptors with Kd in the micromolar range. A Janus protein, with cell wall gluing property, was then designed by assembling this carbohydrate-binding module with a Ralstonia solanacearum lectin specific for fucosylated xyloglucans. The resulting supramolecular architecture is able to bind fucose-containing xyloglucans and homogalacturonan, ensuring high affinity for both. A two-dimensional assembly of an artificial plant cell wall was then built first on synthetic polymer and then on the supported lipid bilayer. Such an artificial cell wall can serve as a basis for the development of plant cell mechanical models and thus deepen the understanding of the principles underlying various aspects of plant cells and tissues.
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Affiliation(s)
- Simona Notova
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Nathan Cannac
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Luca Rabagliati
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Maeva Touzard
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Josselin Mante
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Yotam Navon
- The Pulp and Paper Research & Technical Centre, 38044Grenoble, France
| | | | | | - Laurent Heux
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
| | - Anne Imberty
- Université Grenoble Alpes, CNRS, CERMAV, 38000Grenoble, France
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Soto-Cruz J, Mukwaya V, Naz M, Zhang P, López-Brenes MJ, Sáenz-Arce G, Rojas-Carrillo O, Dou H. Polysaccharide/Lipid Nanoconjugates as Alternative Building Blocks for Highly Biocompatible Microcapsules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:9556-9566. [PMID: 35880575 DOI: 10.1021/acs.langmuir.2c00937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Saccharide/lipid nanoconjugates are attractive building blocks for the construction of micro- and nanosized structures because of the roles of glycolipids in human body, courtesy of their intrinsic and functional properties. Herein, nanoconjugates based on dextran and oleic acid (Dex-OA) were synthesized via facile amide-linkage chemistry. The resultant Dex-OA micelles could self-assemble into spherical water-filled microcapsules via a water-in-oil emulsification process. By cross-linking, the microcapsules could be transferred to aqueous media, forming a stable microcapsule dispersion. According to optical and fluorescence microscopy, the microcapsules displayed a spherical morphology, and their synthesis is dependent on the concentration of Dex-OA nanoconjugates. Furthermore, the microcapsules could easily encapsulate and retain fluorescently labeled dextran. This strategy offers a robust and efficient method for the construction of microcapsules from fully natural amphiphilic building blocks with the potential for application in diverse fields such as biomedicine, protocell research, and microreactors.
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Affiliation(s)
- Jackeline Soto-Cruz
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang, Shanghai 200240, P. R. China
- Laboratorio de Polímeros (POLIUNA), School of Chemistry, Universidad Nacional, Avenue 1, Street 9, Heredia 40101, Costa Rica
- National Center for Biotechnological Innovations (CENIBiot), CeNAT-CONARE, Avenue 35, Street 100, Pavas, San José 10109, Costa Rica
| | - Vincent Mukwaya
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang, Shanghai 200240, P. R. China
- Zhangjiang Institute for Advanced Study (ZIAS), Shanghai Jiao Tong University, 799 Dangui Road, Pudong New District, Shanghai 201203, China
| | - Mehwish Naz
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang, Shanghai 200240, P. R. China
- Zhangjiang Institute for Advanced Study (ZIAS), Shanghai Jiao Tong University, 799 Dangui Road, Pudong New District, Shanghai 201203, China
| | - Peipei Zhang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang, Shanghai 200240, P. R. China
- Zhangjiang Institute for Advanced Study (ZIAS), Shanghai Jiao Tong University, 799 Dangui Road, Pudong New District, Shanghai 201203, China
| | | | - Giovanni Sáenz-Arce
- Departamento de Física, Universidad Nacional, Avenue 1, Street 9, Heredia 40101, Costa Rica
| | - Oscar Rojas-Carrillo
- Laboratorio de Polímeros (POLIUNA), School of Chemistry, Universidad Nacional, Avenue 1, Street 9, Heredia 40101, Costa Rica
| | - Hongjing Dou
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang, Shanghai 200240, P. R. China
- Zhangjiang Institute for Advanced Study (ZIAS), Shanghai Jiao Tong University, 799 Dangui Road, Pudong New District, Shanghai 201203, China
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Chen Z, Zhang W, Yuan Z, Wang Z, Ma R, Chen K. Preparation of Strawberry Chitosan Composite Microcapsules and Their Application in Textiles. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Wu X, Zhang Q, Wang Z, Xu Y, Tao Q, Wang J, Kong X, Sheng K, Wang Y. Investigation of construction and characterization of carboxymethyl chitosan - sodium alginate nanoparticles to stabilize Pickering emulsion hydrogels for curcumin encapsulation and accelerating wound healing. Int J Biol Macromol 2022; 209:1837-1847. [PMID: 35489626 DOI: 10.1016/j.ijbiomac.2022.04.157] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 01/05/2023]
Abstract
Limitations in compatibility and effectiveness in delivering bioactive compounds often make it prohibitively difficult to apply Pickering emulsions in wound dressing. In this research, we prepared Pickering emulsion composite hydrogels based on carboxymethyl chitosan - sodium alginate (CMCS-SA) nanoparticles (NPs) stabilized Pickering emulsions, poloxamer 407 (PLX), and curcumin (CUR). CMCS-SA NPs were prepared and used to stabilize Pickering emulsion. The stability of Pickering emulsion improved with the increase of the concentration of NPs, and was highly sensitive to ionic strength change. This Pickering emulsion remained stable at various temperatures. After curcumin were introduced into the emulsion, 0.6% CMCS-SA NPs Pickering emulsion showed controlled release of curcumin in vitro. The CMCS-SA-PLX-CUR hydrogels also exhibited smooth surface and dense structure. This composite hydrogels has antibacterial properties against Escherichia coli and Staphylococcus aureus. Moreover, the CMCS-SA-PLX-CUR hydrogels improved wound healing and increased expression of Ki67 and CD31. RT-qPCR results indicated that the mRNA levels of α-SMA and TGF-β1 in the CMCS-SA-PLX-CUR group were downregulated, while the mRNA levels of TGF-β3 increased. The present study suggests that the potentials of CMCS-SA-PLX-CUR hydrogels are promising in protecting bioactive components and wound care management.
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Affiliation(s)
- Xinru Wu
- School of Life Sciences, Anhui University, Hefei 230601, Anhui, China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China; Anhui Key Laboratory of Modern Biomanufacturing, Hefei 230601, Anhui, China
| | - Qingao Zhang
- School of Life Sciences, Anhui University, Hefei 230601, Anhui, China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China; Anhui Key Laboratory of Modern Biomanufacturing, Hefei 230601, Anhui, China
| | - Zeming Wang
- School of Life Sciences, Anhui University, Hefei 230601, Anhui, China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China; Anhui Key Laboratory of Modern Biomanufacturing, Hefei 230601, Anhui, China
| | - Yifan Xu
- School of Life Sciences, Anhui University, Hefei 230601, Anhui, China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China; Anhui Key Laboratory of Modern Biomanufacturing, Hefei 230601, Anhui, China
| | - Qiuru Tao
- School of Life Sciences, Anhui University, Hefei 230601, Anhui, China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China; Anhui Key Laboratory of Modern Biomanufacturing, Hefei 230601, Anhui, China
| | - Jingmin Wang
- School of Life Sciences, Anhui University, Hefei 230601, Anhui, China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China; Anhui Key Laboratory of Modern Biomanufacturing, Hefei 230601, Anhui, China
| | - Xiaowei Kong
- School of Life Sciences, Anhui University, Hefei 230601, Anhui, China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China; Anhui Key Laboratory of Modern Biomanufacturing, Hefei 230601, Anhui, China
| | - Kangliang Sheng
- School of Life Sciences, Anhui University, Hefei 230601, Anhui, China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China; Anhui Key Laboratory of Modern Biomanufacturing, Hefei 230601, Anhui, China.
| | - Yongzhong Wang
- School of Life Sciences, Anhui University, Hefei 230601, Anhui, China; Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes, Anhui University, Hefei 230601, Anhui, China; Anhui Key Laboratory of Modern Biomanufacturing, Hefei 230601, Anhui, China; Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, Anhui, China.
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Gomez-Maldonado D, Reynolds AM, Burnett DJ, Babu RJ, Waters MN, Peresin MS. Delignified wood aerogels as scaffolds coated with an oriented chitosan–cyclodextrin co-polymer for removal of microcystin-LR. RSC Adv 2022; 12:20330-20339. [PMID: 35919592 PMCID: PMC9278526 DOI: 10.1039/d2ra03556a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 07/06/2022] [Indexed: 11/21/2022] Open
Abstract
Nano-porous aerogels are an advantageous approach to produce low-density materials with high surface area, particularly when using biobased materials. Frequently, most biobased aerogels are synthesized through a bottom-up approach, which requires high energy inputs to break and rebuild the raw materials, and for elimination of water. To curb this, this work focused on generating aerogels by a top-down approach through the delignification of a wood substrate while eliminating water by solvent exchange. To diversify the surface chemistry for use in water treatment, the delignified wood–nanowood-was coated with a chitosan–cyclodextrin co-polymer and tested in the capture of microcystin-LR. The generated nanowood structure had 75% porosity after coating, with up to 339% water swelling and an adsorption capacity of 0.12 mg g−1 of the microcystin. This top-down technique enables the generation of low-cost aerogels by reducing steps, using a biobased self-assembled coating with hydrophobic active sites, and avoiding costly energetic input. Herein, a preassembled chitosan-cyclodextrin was used as a versatile coating onto delignified wood as an alternative for the removal of microcystin-LR. The addition of β-cyclodextrin proved to allow the nanowood scaffold to adsorb up to 0.12 mg g−1.![]()
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Affiliation(s)
- Diego Gomez-Maldonado
- Forest Products Development Center, College of Forestry, Wildlife and Environment, Auburn University, Auburn, AL 36849, USA
| | - Autumn Marie Reynolds
- Forest Products Development Center, College of Forestry, Wildlife and Environment, Auburn University, Auburn, AL 36849, USA
| | | | | | - Matthew N. Waters
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, AL 36849, USA
| | - Maria S. Peresin
- Forest Products Development Center, College of Forestry, Wildlife and Environment, Auburn University, Auburn, AL 36849, USA
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11
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Gao Y, Geng X, Wang X, Han N, Zhang X, Li W. Synthesis and characterization of microencapsulated phase change materials with chitosan-based polyurethane shell. Carbohydr Polym 2021; 273:118629. [PMID: 34561020 DOI: 10.1016/j.carbpol.2021.118629] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/15/2021] [Accepted: 08/28/2021] [Indexed: 11/29/2022]
Abstract
In this paper, chitosan-based polyurethane (c-PU) microencapsulated phase change materials (MicroPCMs) were prepared via the interfacial polymerization reaction of hexamethylene diisocyanate and chitosan accompanied by the charge attraction-assisted. The utilization of natural non-toxic chitosan in MicroPCMs expanded the application of chitosan and guided a new approach to preparing green shell. And the morphology of MicroPCMs with different reaction ration, surfactant and the pH value of reaction system were systematically investigated. The MicroPCMs with c-PU shell exhibited outstanding latent thermal performance (ΔHm = 106.3 J/g, ΔHc = -105.1 J/g), high energy storage efficiency (E = 71.4%), excellent thermal stability and cyclic durability. The c-PU MicroPCMs with reversible photochromic show promising application in the fields of anti-counterfeiting technology and flexible wearable UV protective clothing.
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Affiliation(s)
- Yan Gao
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Xiaoye Geng
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Xiaojuan Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Na Han
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Xingxiang Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Wei Li
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China.
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Metaxa ZS, Tolkou AK, Efstathiou S, Rahdar A, Favvas EP, Mitropoulos AC, Kyzas GZ. Nanomaterials in Cementitious Composites: An Update. Molecules 2021; 26:1430. [PMID: 33800797 PMCID: PMC7961426 DOI: 10.3390/molecules26051430] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/25/2021] [Accepted: 03/03/2021] [Indexed: 11/16/2022] Open
Abstract
This review is an update about the addition of nanomaterials in cementitious composites in order to improve their performance. The most common used nanomaterials for cementitious materials are carbon nanotubes, nanocellulose, nanographene, graphene oxide, nanosilica and nanoTiO2. All these nanomaterials can improve the physical, mechanical, thermal and electrical properties of cementitious composites, for example increase their compressive and tensile strength, accelerate hydration, decrease porosity and enhance fire resistance. Cement based materials have a very complex nanostructure consisting of hydration products, crystals, unhydrated cement particles and nanoporosity where traditional reinforcement, which is at the macro and micro scale, is not effective. Nanomaterials can reinforce the nanoscale, which wasn't possible heretofore, enhancing the performance of the cementitious matrix.
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Affiliation(s)
- Zoi S. Metaxa
- Department of Chemistry, International Hellenic University, GR-654 04 Kavala, Greece; (S.E.); (A.C.M.)
| | - Athanasia K. Tolkou
- Laboratory of Chemical and Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece;
| | - Stefania Efstathiou
- Department of Chemistry, International Hellenic University, GR-654 04 Kavala, Greece; (S.E.); (A.C.M.)
| | - Abbas Rahdar
- Department of Physics, Faculty of Science, University of Zabol, Zabol 98613-35856, Iran;
| | - Evangelos P. Favvas
- Institute of Nanoscience and Nanotechnology, NCSR “Demokritos”, Aghia Paraskevi, GR-153 41 Athens, Greece;
| | - Athanasios C. Mitropoulos
- Department of Chemistry, International Hellenic University, GR-654 04 Kavala, Greece; (S.E.); (A.C.M.)
| | - George Z. Kyzas
- Department of Chemistry, International Hellenic University, GR-654 04 Kavala, Greece; (S.E.); (A.C.M.)
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