1
|
Hassane Hamadou A, Zhang J, Li H, Chen C, Xu B. Modulating the glycemic response of starch-based foods using organic nanomaterials: strategies and opportunities. Crit Rev Food Sci Nutr 2023; 63:11942-11966. [PMID: 35900010 DOI: 10.1080/10408398.2022.2097638] [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] [Indexed: 11/03/2022]
Abstract
Traditionally, diverse natural bioactive compounds (polyphenols, proteins, fatty acids, dietary fibers) are used as inhibitors of starch digestive enzymes for lowering glycemic index (GI) and preventing type 2 diabetes mellitus (T2DM). In recent years, organic nanomaterials (ONMs) have drawn a great attention because of their ability to overcome the stability and solubility issues of bioactive. This review aimed to elucidate the implications of ONMs in lowering GI and as encapsulating agents of enzymes inhibitors. The major ONMs are presented. The mechanisms underlying the inhibition of enzymes, the stability within the gastrointestinal tract (GIT) and safety of ONMs are also provided. As a result of encapsulation of bioactive in ONMs, a more pronounced inhibition of enzymes was observed compared to un-encapsulated bioactive. More importantly, the lower the size of ONMs, the higher their inhibitory effects due to facile binding with enzymes. Additionally, in vivo studies exhibited the potentiality of ONMs for protection and sustained release of insulin for GI management. Overall, regulating the GI using ONMs could be a safe, robust and viable alternative compared to synthetic drugs (acarbose and voglibose) and un-encapsulated bioactive. Future researches should prioritize ONMs in real food products and evaluate their safety on a case-by-case basis.
Collapse
Affiliation(s)
| | - Jiyao Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Haiteng Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Chao Chen
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Bin Xu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China
| |
Collapse
|
2
|
Minoia JM, Villanueva ME, Copello GJ, Rodríguez Talou J, Cardillo AB. Recycling of hyoscyamine 6β-hydroxylase for the in vitro production of anisodamine and scopolamine. Appl Microbiol Biotechnol 2023; 107:3459-3478. [PMID: 37099059 DOI: 10.1007/s00253-023-12537-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 04/10/2023] [Accepted: 04/13/2023] [Indexed: 04/27/2023]
Abstract
The tropane alkaloids hyoscyamine, anisodamine, and scopolamine are extensively used medicines. In particular, scopolamine has the greatest value in the market. Hence, strategies to enhance its production have been explored as an alternative to traditional field-plant cultivation. In this work, we developed biocatalytic strategies for the transformation of hyoscyamine into its products utilizing a recombinant Hyoscyamine 6β-hydroxylase (H6H) fusion protein to the chitin-binding domain of the chitinase A1 from Bacillus subtilis (ChBD-H6H). Catalysis was carried out in batch, and recycling of H6H constructions was performed via affinity-immobilization, glutaraldehyde crosslinking, and adsorption-desorption of the enzyme to different chitin matrices. ChBD-H6H utilized as free enzyme achieved complete conversion of hyoscyamine in 3- and 22-h bioprocesses. Chitin particles demonstrated to be the most convenient support for ChBD-H6H immobilization and recycling. Affinity-immobilized ChBD-H6H operated in a three-cycle bioprocess (3 h/cycle, 30 °C) yielded in the first and third reaction cycle 49.8% and 22.2% of anisodamine and 0.7% and 0.3% of scopolamine, respectively. However, glutaraldehyde crosslinking decreased enzymatic activity in a broad range of concentrations. Instead, the adsorption-desorption approach equaled the maximal conversion of the free enzyme in the first cycle and retained higher enzymatic activity than the carrier-bound strategy along the consecutive cycles. The adsorption-desorption strategy permitted the reutilization of the enzyme in a simple and economical manner while exploiting the maximal conversion activity displayed by the free enzyme. This approach is valid since other enzymes present in the E. coli lysate do not interfere with the reaction. KEY POINTS: • A biocatalytic system for anisodamine and scopolamine production was developed. • Affinity-immobilized ChBD-H6H in ChP retained catalytic activity. • Enzyme-recycling by adsorption-desorption strategies improves product yields.
Collapse
Affiliation(s)
- Juan M Minoia
- Facultad de Farmacia Y Bioquímica, Departamento de Microbiología, Inmunología, Biotecnología y Genética, Cátedra de Biotecnología, Universidad de Buenos Aires, Buenos Aires, Argentina
- CONICET - Universidad de Buenos Aires, Instituto de Nanobiotecnología (NANOBIOTEC), Buenos Aires, Argentina
| | - María E Villanueva
- CONICET - Universidad de Buenos Aires, Instituto de Química Y Metabolismo del Fármaco (IQUIMEFA), Buenos Aires, Argentina
- Departamento de Ciencias Básicas, Universidad Nacional de Luján (UNLu), Luján, Provincia de Buenos Aires, Argentina
| | - Guillermo J Copello
- CONICET - Universidad de Buenos Aires, Instituto de Química Y Metabolismo del Fármaco (IQUIMEFA), Buenos Aires, Argentina
- Facultad de Farmacia Y Bioquímica, Departamento de Ciencias Químicas, Cátedra de Química Analítica Instrumental, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Julián Rodríguez Talou
- Facultad de Farmacia Y Bioquímica, Departamento de Microbiología, Inmunología, Biotecnología y Genética, Cátedra de Biotecnología, Universidad de Buenos Aires, Buenos Aires, Argentina
- CONICET - Universidad de Buenos Aires, Instituto de Nanobiotecnología (NANOBIOTEC), Buenos Aires, Argentina
| | - Alejandra B Cardillo
- Facultad de Farmacia Y Bioquímica, Departamento de Microbiología, Inmunología, Biotecnología y Genética, Cátedra de Biotecnología, Universidad de Buenos Aires, Buenos Aires, Argentina.
- CONICET - Universidad de Buenos Aires, Instituto de Nanobiotecnología (NANOBIOTEC), Buenos Aires, Argentina.
| |
Collapse
|
3
|
Synthesis and characterization of functionalized modified PVC-chitosan as antimicrobial polymeric biomaterial. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04478-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AbstractAmino acetic acid modified poly(vinyl chloride), MPVC, was obtained by chemical modification of PVC using glycine methyl ester. MPVC was used as a precursor to prepare some functionalized MPVC conjugates to be used in biomedical applications. MPVC-Cs was prepared by the chemical reaction of MPVC with chitosan as a natural polymer in absence and presence of epichlorohydrin (Ech) as a crosslinking agent. Further chemical modification was performed by the reaction of MPVC with Cs and salicylic acid in the absence in presence of Ech via one-pot reaction. The chemical structure of the formed MPVC, MPVC-Cs, MPVC-Cs/POH, MPVC-Cs/SA and MPVC-Cs/POH/SA was confirmed by the FTIR spectroscopic analysis, scanning electron microscopy, and thermogravimetric analysis (TGA). The antibacterial activity of the prepared MPVC and its conjugates was investigated against two Gram +ve bacteria (Staphylococcus aurous and Listeria monocytogenes) and (Escherichia coli and Salmonella typhi) as Gram −ve bacteria in addition to the Catondida albicans as yeast. Minimum inhibition concentration (MIC) was also determined for the prepared materials.
Collapse
|
4
|
Chitin Nanocrystals: Environmentally Friendly Materials for the Development of Bioactive Films. COATINGS 2022. [DOI: 10.3390/coatings12020144] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Biobased nanomaterials have gained growing interest in recent years for the sustainable development of composite films and coatings, providing new opportunities and high-performance products. In particular, chitin and cellulose nanocrystals offer an attractive combination of properties, including a rod shape, dispersibility, outstanding surface properties, and mechanical and barrier properties, which make these nanomaterials excellent candidates for sustainable reinforcing materials. Until now, most of the research has been focused on cellulose nanomaterials; however, in the last few years, chitin nanocrystals (ChNCs) have gained more interest, especially for biomedical applications. Due to their biological properties, such as high biocompatibility, biodegradability, and antibacterial and antioxidant properties, as well as their superior adhesive properties and promotion of cell proliferation, chitin nanocrystals have emerged as valuable components of composite biomaterials and bioactive materials. This review attempts to provide an overview of the use of chitin nanocrystals for the development of bioactive composite films in biomedical and packaging systems.
Collapse
|
5
|
Tovar Jimenez GI, Valverde A, Mendes-Felipe C, Wuttke S, Fidalgo-Marijuan A, Larrea ES, Lezama L, Zheng F, Reguera J, Lanceros-Méndez S, Arriortua MI, Copello G, de Luis RF. Chitin/Metal-Organic Framework Composites as Wide-Range Adsorbent. CHEMSUSCHEM 2021; 14:2892-2901. [PMID: 33829652 DOI: 10.1002/cssc.202100675] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Indexed: 06/12/2023]
Abstract
Composites based on chitin (CH) biopolymer and metal-organic framework (MOF) microporous nanoparticles have been developed as broad-scope pollutant absorbent. Detailed characterization of the CH/MOF composites revealed that the MOF nanoparticles interacted through electrostatic forces with the CH matrix, inducing compartmentalization of the CH macropores that led to an overall surface area increase in the composites. This created a micro-, meso-, and macroporous structure that efficiently retained pollutants with a broad spectrum of different chemical natures, charges, and sizes. The unique prospect of this approach is the combination of the chemical diversity of MOFs with the simple processability and biocompatibility of CH that opens application fields beyond water remediation.
Collapse
Affiliation(s)
- Gabriel I Tovar Jimenez
- Facultad de Farmacia y Bioquímica, Departamento de Química Analítica y Fisicoquímica, Universidad de Buenos Aires (UBA), Junín 956, C1113AAD, Buenos Aires, Argentina
- Fac. de Farmacia y Bioquímica, (IQUIMEFA-UBA-CONICET), Instituto de Química y Metabolismo del Fármaco, Junín 956, C1113AAD, Buenos Aires, Argentina
| | - Ainara Valverde
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
- Macromolecular Chemistry Group (LABQUIMAC), Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940, Leioa, Spain
- 48013, Bilbao, Spain
| | - Cristian Mendes-Felipe
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
- Macromolecular Chemistry Group (LABQUIMAC), Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940, Leioa, Spain
- 48013, Bilbao, Spain
| | - Stefan Wuttke
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
| | - Arkaitz Fidalgo-Marijuan
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
- Dept. of Organic Chemistry II, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940, Leioa, Spain
- 48013, Bilbao, Spain
| | - Edurne S Larrea
- Le Studium Research Fellow, Loire Valley Institute for Advanced Studies, 45100, Orléans, France
- CEMHTI - UPR3079 CNRS, 1 avenue de la Recherche Scientifique, 45100, Orléans, France
| | - Luis Lezama
- Departamento de Química Inorgánica, Facultad de Ciencia y Tecnología, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940, Leioa, Spain
- 48013, Bilbao, Spain
| | - Fangyuan Zheng
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
| | - Javier Reguera
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
| | - Senentxu Lanceros-Méndez
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
| | - María I Arriortua
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
- Departamento de Geología, Facultad de Ciencia y Tecnología, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940, Leioa, Spain
- 48013, Bilbao, Spain
| | - Guillermo Copello
- Facultad de Farmacia y Bioquímica, Departamento de Química Analítica y Fisicoquímica, Universidad de Buenos Aires (UBA), Junín 956, C1113AAD, Buenos Aires, Argentina
- Fac. de Farmacia y Bioquímica, (IQUIMEFA-UBA-CONICET), Instituto de Química y Metabolismo del Fármaco, Junín 956, C1113AAD, Buenos Aires, Argentina
| | - Roberto Fernández de Luis
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
| |
Collapse
|
6
|
Jin T, Liu T, Lam E, Moores A. Chitin and chitosan on the nanoscale. NANOSCALE HORIZONS 2021; 6:505-542. [PMID: 34017971 DOI: 10.1039/d0nh00696c] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In a matter of decades, nanomaterials from biomass, exemplified by nanocellulose, have rapidly transitioned from once being a subject of curiosity to an area of fervent research and development, now reaching the stages of commercialization and industrial relevance. Nanoscale chitin and chitosan, on the other hand, have only recently begun to raise interest. Attractive features such as excellent biocompatibility, antibacterial activity, immunogenicity, as well as the tuneable handles of their acetylamide (chitin) or primary amino (chitosan) functionalities indeed display promise in areas such as biomedical devices, catalysis, therapeutics, and more. Herein, we review recent progress in the fabrication and development of these bio-nanomaterials, describe in detail their properties, and discuss the initial successes in their applications. Comparisons are made to the dominant nanocelluose to highlight some of the inherent advantages that nanochitin and nanochitosan may possess in similar application.
Collapse
Affiliation(s)
- Tony Jin
- Center in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 0B8, Canada.
| | | | | | | |
Collapse
|
7
|
Nasirinezhad M, Ghaffarian SR, Tohidian M. Nanocomposite Membranes Based on Imidazole-Functionalized Chitin Nanowhiskers for Direct Methanol Fuel Cell Applications. J MACROMOL SCI B 2021. [DOI: 10.1080/00222348.2021.1892977] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Mojtaba Nasirinezhad
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran
| | - Seyed Reza Ghaffarian
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran
| | - Mahdi Tohidian
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran
| |
Collapse
|
8
|
Rameshthangam P, Solairaj D, Arunachalam G, Ramasamy P. Chitin and Chitinases: Biomedical And Environmental Applications of Chitin and its Derivatives. ACTA ACUST UNITED AC 2020. [DOI: 10.14302/issn.2690-4829.jen-18-2043] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Disposal of chitin wastes from crustacean shell can cause environmental and health hazards. Chitin is a well known abundant natural polymer extracted after deproteinization and demineralization of the shell wastes of shrimp, crab, lobster, and krill. Extraction of chitin and its derivatives from waste material is one of the alternative ways to turn the waste into useful products. Chitinases are enzymes that degrade chitin. Chitinases contribute to the generation of carbon and nitrogen in the ecosystem. Chitin and chitinolytic enzymes are gaining importance for their biotechnological applications. The presence of surface charge and multiple functional groups make chitin as a beneficial natural polymer. Due to the reactive functional groups chitin can be used for the preparation of a spectrum of chitin derivatives such as chitosan, alkyl chitin, sulfated chitin, dibutyryl chitin and carboxymethyl chitin for specific applications in different areas. The present review is aimed to summarize the efficacy of the chitinases on the chitin and its derivatives and their diverse applications in biomedical and environmental field. Further this review also discusses the synthesis of various chitin derivatives in detail and brings out the importance of chitin and its derivatives in biomedical and environmental applications.
Collapse
Affiliation(s)
| | - Dhanasekaran Solairaj
- Department of Biotechnology, Alagappa University, Karaikudi 630003, Tamilnadu, India
| | - Gnanapragasam Arunachalam
- College of Poultry Productions and Management, Tamil Nadu Veterinary and Animal Sciences University, Hosur - 635 110, Tamil Nadu, India
| | - Palaniappan Ramasamy
- Director- Research, Sree Balaji Medical College and Hospital, BIHER- Bharath University, Chennai-600041, Tamil Nadu, India
| |
Collapse
|
9
|
Wang Y, Sun Y, Li M, Xiong L, Xu X, Ji N, Dai L, Sun Q. The formation of a protein corona and the interaction with α-amylase by chitin nanowhiskers in simulated saliva fluid. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2019.105615] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
10
|
Carsi M, Sanchis MJ, Gómez CM, Rodriguez S, G Torres F. Effect of Chitin Whiskers on the Molecular Dynamics of Carrageenan-Based Nanocomposites. Polymers (Basel) 2019; 11:polym11061083. [PMID: 31242647 PMCID: PMC6630605 DOI: 10.3390/polym11061083] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 06/12/2019] [Accepted: 06/18/2019] [Indexed: 12/12/2022] Open
Abstract
Films of carrageenan (KC) and glycerol (g) with different contents of chitin nanowhiskers (CHW) were prepared by a solution casting process. The molecular dynamics of pure carrageenan (KC), carrageenan/glycerol (KCg) and KCg with different quantities of CHWs as a filler was studied using dielectric relaxation spectroscopy. The analysis of the CHW effect on the molecular mobility at the glass transition, Tg, indicates that non-attractive intermolecular interactions between KCg and CHW occur. The fragility index increased upon CHW incorporation, due to a reduction in the polymer chains mobility produced by the CHW confinement of the KCg network. The apparent activation energy associated with the relaxation dynamics of the chains at Tg slightly increased with the CHW content. The filler nature effect, CHW or montmorillonite (MMT), on the dynamic mobility of the composites was analyzed by comparing the dynamic behavior of both carrageenan-based composites (KCg/xCHW, KCg/xMMT).
Collapse
Affiliation(s)
- Marta Carsi
- Department of Applied Thermodynamics, Instituto de Automática e Informática Industrial, Universitat Politècnica de Valencia, 46022 Valencia, Spain.
| | - Maria J Sanchis
- Department of Applied Thermodynamics, Instituto de Tecnología Eléctrica, Universitat Politècnica de València, 46022 Valencia, Spain.
| | - Clara M Gómez
- Departament de Química Física, Institut de Ciència dels Materials, Universitat de València, 46010 Valencia, Spain.
| | - Sol Rodriguez
- Department of Mechanical Engineering, Pontificia Universidad Católica del Peru, Lima 32, Peru.
| | - Fernando G Torres
- Department of Mechanical Engineering, Pontificia Universidad Católica del Peru, Lima 32, Peru.
| |
Collapse
|
11
|
Xu Y, Liang K, Ullah W, Ji Y, Ma J. Chitin nanocrystal enhanced wet adhesion performance of mussel-inspired citrate-based soft-tissue adhesive. Carbohydr Polym 2018; 190:324-330. [DOI: 10.1016/j.carbpol.2018.03.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 02/02/2018] [Accepted: 03/05/2018] [Indexed: 02/06/2023]
|
12
|
Lutz M, Engelbrecht L, Laurie A, Dyayiya N. Using CLEM to investigate the distribution of nano-sized antimicrobial agents within an EVOH matrix. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2018. [DOI: 10.1080/1023666x.2018.1426157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Marietjie Lutz
- Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, South Africa
| | - Lize Engelbrecht
- Central Analytical Facilities, Stellenbosch University, Stellenbosch, South Africa
| | - Angelique Laurie
- Central Analytical Facilities, Stellenbosch University, Stellenbosch, South Africa
| | - Nelisa Dyayiya
- Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, South Africa
| |
Collapse
|
13
|
Preparation and performance optimization of PVDF anti-fouling membrane modified by chitin. JOURNAL OF POLYMER ENGINEERING 2017. [DOI: 10.1515/polyeng-2016-0372] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The poly(vinylidene fluoride) (PVDF)/chitin (CH) blend membranes were prepared by the immersion phase inversion method using N,N-dimethylacetamide (DMAc)/lithium chloride (LiCl) as the co-solvent. It was found that blending CH with PVDF allowed membranes to have a better hydrophilicity, penetrability, antifouling and antibacterial performance. In order to improve the performance of PVDF/CH blend membranes further, water/ethanoic acid (HAc) solutions with different compositions were employed as coagulation baths. The effects of HAc volume percentage in coagulation baths on the surface composition, morphology, wettability, water flux, antifouling and antibacterial property of PVDF/CH membrane were investigated. The results indicated that the content of CH on the surface of the membrane increased with the increase of HAc concentration in coagulation baths, which contributed to an improvement of hydrophilicity. The increasing HAc content in coagulation baths also led to a change from finger-like pores to sponge-like pores and a decrease of porosity for PVDF/CH blend membranes. When increasing HAc concentration, the antifouling performance of the blend membranes was improved. Meanwhile, the amidogen of CH on PVDF/CH membrane surfaces could suppress the growth of bacteria, and the blend membrane showed an improved antibacterial performance with the volume ratio of HAc increasing.
Collapse
|
14
|
Banerjee SL, Khamrai M, Sarkar K, Singha NK, Kundu P. Modified chitosan encapsulated core-shell Ag Nps for superior antimicrobial and anticancer activity. Int J Biol Macromol 2016; 85:157-67. [DOI: 10.1016/j.ijbiomac.2015.12.068] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 12/18/2015] [Accepted: 12/20/2015] [Indexed: 12/21/2022]
|
15
|
Villanueva ME, Salinas A, González JA, Teves S, Copello GJ. Dual antibacterial effect of immobilized quaternary ammonium and aliphatic groups on PVC. NEW J CHEM 2015. [DOI: 10.1039/c5nj01766a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quaternary ammonium salts and lipophilic moieties were separately immobilized onto PVC to obtain a broad spectrum antimicrobial coating.
Collapse
Affiliation(s)
- María Emilia Villanueva
- Cátedra de Química Analítica Instrumental
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires (UBA)
- IQUIMEFA (UBA-CONICET)
- C1113AAD Buenos Aires
| | - Ana Salinas
- Cátedra de Química Analítica Instrumental
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires (UBA)
- IQUIMEFA (UBA-CONICET)
- C1113AAD Buenos Aires
| | - Joaquín Antonio González
- Cátedra de Química Analítica Instrumental
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires (UBA)
- IQUIMEFA (UBA-CONICET)
- C1113AAD Buenos Aires
| | - Sergio Teves
- Cátedra de Microbiología
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires (UBA)
- C1113AAD Ciudad de Buenos Aires
- Argentina
| | - Guillermo Javier Copello
- Cátedra de Química Analítica Instrumental
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires (UBA)
- IQUIMEFA (UBA-CONICET)
- C1113AAD Buenos Aires
| |
Collapse
|