Article
Polymer Science
Yifei Gao, Huaming Zheng, Jingjing Wang, Jiangyu Wu, Xingyu Li, Gang Liu
Summary: By using glycerol (GLY) and glutaraldehyde (GDA) as plasticizer and cross-linking agent, respectively, modified zein films were fabricated to improve mechanical properties. It was found that above 1 wt% GDA could reduce the tensile strength of the film, and the optimum films were obtained with 25 wt% GLY and 1 wt% GDA. The cross-linking mechanism involved lubrication by GLY between zein molecular chains and network formation through cross-linking reactions by GDA. These findings contribute to the development of eco-friendly, biodegradable polymers for packaging applications.
Article
Nutrition & Dietetics
Bin Wang, Xin Xu, Youxin Fang, Shouxin Yan, Bo Cui, A. M. Abd El-Aty
Summary: This study prepared corn starch-based films using a solution casting method and investigated the physicochemical properties by adding different ratios of glycerol and erythritol as plasticizing agents. As the glycerol ratio increased, certain properties of the films improved, but it also led to a decrease in tensile strength and thermal stability.
FRONTIERS IN NUTRITION
(2022)
Article
Biochemistry & Molecular Biology
Hongguang Zhu, Hanqi Tang, Fei Li, Haixin Sun, Litao Tong
Summary: This study investigated the effect of milling on grasshopper chitin, chitosan, and chitosan films to obtain high-quality insect products. The results showed that milling intensity reduced the crystallinity and thermal stability of chitin, chitosan, and chitosan films, but improved the purity of chitin and the yield of chitosan. Chitosan prepared from finer powders had higher deacetylation degree, solubility, and lower molecular weight, viscosity, and water/fat binding capacity.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Chemical
Waheed A. Al-Masry, Sajjad Haider, Asif Mahmood, Mujeeb Khan, Syed Farooq Adil, Mohammed Rafiq H. Siddiqui
Summary: Industry-sponsored research on biopolymers as substitutes for synthetic polymers has increased. Plasticizers like glycerol are crucial in enhancing the physicochemical properties of biopolymers, but gamma-irradiation can lead to changes in the chemical structure and morphology of the composite films.
Article
Polymer Science
Qingfei Duan, Ying Chen, Long Yu, Fengwei Xie
Summary: Biopolymers have high potential for specialized applications and creating composite materials with defined chain interactions and tailored properties is important. This study shows that glycerol and isosorbide are effective plasticizers for a chitosan-gelatin material, but isosorbide can disrupt the polyelectrolyte complexation between the biopolymers, impacting the material's glass transition temperature, mechanical properties, and water absorption. The addition of isosorbide and/or montmorillonite makes the materials hydrolytically unstable, but also affects surface hydrophilicity differently from chain structure.
Article
Polymer Science
Moon Hyun Lee, Dae Ryeong Lee, Joon Woo Chon, Dong June Chung
Summary: In this study, biocompatible hemostatic crosslinked chitosan patches were manufactured and their properties were analyzed for femoral arterial puncture applications. The crosslinked chitosan films showed low swelling degrees, good mechanical properties, and enhanced hemostatic ability when coated with thrombin, while being non-toxic in cell cytotoxicity tests.
Article
Materials Science, Multidisciplinary
Sai Geetha Marapureddy, Prachi Thareja
Summary: This study investigates the synergistic effect of Glutaraldehyde (GA) chemical crosslinking and Graphene Oxide (GO) physical crosslinking on Chitosan (CH) to enhance the mechanical strength of CH hydrogels and films. The results show that increasing the loading of GA and GO leads to improved storage modulus and yield stress values. Additionally, the morphology studies reveal improved porosity in CH-GA and CH-GO-GA hydrogels with increased GA and GO loading. The incorporation of GO nanosheets in CH-GA hydrogel films significantly increases their Young's modulus. Drug delivery studies demonstrate that the CH-GO-GA film exhibits pH-responsive behavior and sustained drug release.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Applied
Xia Chang, Yuhao Hou, Qian Liu, Ziyan Hu, Qiutao Xie, Yang Shan, Gaoyang Li, Shenghua Ding
Summary: Antimicrobial composite films based on chitosan, GML, and nano-TiO2 showed excellent properties such as superior barrier performance and antimicrobial activity.
FOOD HYDROCOLLOIDS
(2021)
Article
Materials Science, Multidisciplinary
Carmen Rodica Pop, Teodora Emilia Coldea, Liana Claudia Salanta, Alina Lacramioara Nistor, Andrei Borsa, Anca Corina Farcas, Vasile Constantin Florian, Ancuta Mihaela Rotar
Summary: This study aimed to investigate the effect of different extraction conditions of kefiran on the structural and physical properties of the edible films obtained. It was found that the intertwining between plasticizers and water molecules could lead to conformational changes in the kefiran film structure, resulting in the production of flexible films. Extraction conditions were also observed to significantly impact the properties of these films and their applications in food technology.
Article
Biochemistry & Molecular Biology
Qingtong Xie, Xudong Zheng, Liuting Li, Liqun Ma, Qihui Zhao, Shiyuan Chang, Lijun You
Summary: A pectin/chitosan matrix-loaded curcumin film was prepared using a deep eutectic solvent as the solvent and plasticizer. Curcumin addition improved the barrier, mechanical, antioxidant, and antiseptic properties of the polysaccharide-based film, but caused a decrease in light transmission and elongation. The addition of curcumin also changed the film's color without significantly affecting its moisture content.
Article
Polymer Science
Oliver J. Pemble, Maria Bardosova, Ian M. Povey, Martyn E. Pemble
Summary: Chitosan-based films face commercial limitation due to a lack of specific methods for high-volume production of thin films. Hydrogels made from chitosan, TEOS, and glutaraldehyde were used to create continuous thin films via a slot-die technique, showing higher mechanical strength compared to films made with chitosan alone. Testing on plain chitosan samples revealed no mechanical anisotropy induced by the slot-die process, demonstrating potential for cost-effective high-volume production of chitosan-based films for various applications.
Article
Polymer Science
Candy del Carmen Gamboa-Solana, Martha Gabriela Chuc-Gamboa, Fernando Javier Aguilar-Perez, Juan Valerio Cauich-Rodriguez, Rossana Faride Vargas-Coronado, David Alejandro Aguilar-Perez, Jose Ruben Herrera-Atoche, Neith Pacheco
Summary: The study prepared different composite material films and found that one containing chitosan crosslinked with glutaraldehyde exhibited antimicrobial activity against S. aureus, while all films showed antimicrobial activity against S. typhimurium. These findings suggest that chitosan composite films have potential applications in the medical and food industry fields.
Article
Polymer Science
Wei Zhang, Wentao Zhou, Zisen Zhang, Di Zhang, Zhengzheng Guo, Penggang Ren, Fei Liu
Summary: This study improves the mechanical properties and thermal stability of chitosan films by adding a plasticizer (sorbitol) and nano-filler (SiO2). The addition of sorbitol significantly increases the elongation at break of chitosan films, while nano-SiO2 further enhances the flexibility and toughness of the composite films.
Article
Chemistry, Physical
R. Luna, F. Touhami, M. J. Uddin, A. Touhami
Summary: The pH of chitosan solution and curing temperature of the chitosan films are key factors affecting their nanostructural and mechanical properties;
Even small changes in pH and temperature could lead to different structure and mechanics of the film;
Chitosan films prepared from a solution of pH 4.3 and dried at 60 degrees C demonstrated very good mechanical properties and smooth surface.
SURFACES AND INTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Fatemeh Doustdar, Ali Olad, Marjan Ghorbani
Summary: The effects of glutaraldehyde and calcium cations on the characteristics of chitosan/cellulose nanocrystals scaffolds were investigated. Four different scaffolds with different crosslinking methods were prepared and studied. The results showed that the glutaraldehyde-crosslinked scaffold had the highest compressive strength, while the calcium cation-crosslinked scaffold degraded the fastest.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Forestry
Uasmim Lira Zidanes, Matheus Cordazzo Dias, Mario Sergio Lorenco, Elesandra da Silva Araujo, Maryella Junnia Ferreira e Silva, Thais Brito Sousa, Saulo Rocha Ferreira, Julio Cesar Ugucioni, Gustavo Henrique Denzin Tonoli, Maria Lucia Bianchi, Fabio Akira Mori
Summary: The research evaluated the incorporation of cellulose nanofibrils into adhesives made of tannins obtained from the Angico tree, finding that the adhesive with 5% CNFs showed improvements in mechanical strength and humidity resistance on the glue line.
Article
Engineering, Chemical
Raissa Alvarenga Carvalho Gomide, Ana Carolina Salgado de Oliveira, Lucas Baldo Luvizaro, Maria Irene Yoshida, Cassiano Rodrigues de Oliveira, Soraia Vilela Borges
Summary: The addition of lignin microparticles to whey protein isolate films did not alter the film structure, showing good dispersion at lower concentrations. The films exhibited improved thermal and mechanical properties, as well as enhanced antioxidant potential with higher concentrations of lignin microparticles. This combination of polymers shows promise for developing new active packaging with antioxidant properties to extend food shelf life.
JOURNAL OF FOOD PROCESS ENGINEERING
(2021)
Article
Agricultural Engineering
Laura Fonseca Ferreira, Ana Carolina Salgado de Oliveira, Danielly de Oliveira Begali, Alfredo Rodrigues de Sena Neto, Maria Alice Martins, Juliano Elvis de Oliveira, Soraia Vilela Borges, Maria Irene Yoshida, Gustavo Henrique Denzin Tonoli, Marali Vilela Dias
Summary: The study on blends of cassava starch and soy protein isolate revealed that the addition of protein resulted in increased crosslinking between polymer chains, leading to increased crystallinity, stiffness, and decreased transparency. The S40P60 blend showed low water vapor and oil permeability, making it suitable for packaging high-fat content foods.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Engineering, Environmental
Ana Carolina Salgado de Oliveira, Laura Fonseca Ferreira, Danielly de Oliveira Begali, Julio Cesar Ugucioni, Alfredo Rodrigues de Sena Neto, Maria Irene Yoshida, Soraia Vilela Borges
Summary: The research showed that processing pectin with extrusion/thermo-compression can produce a potential plastic film for industrial application, which has good water vapor permeability, tensile strength, and puncture resistance, and the color parameters are suitable for consumer viewing of the product packaging. This process is more efficient compared to casting films.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Materials Science, Paper & Wood
Danielly De Oliveira Begali, Ana Carolina Salgado De Oliveira, Laura Fonseca Ferreira, Cassiano Rodrigues De Oliveira, Luis Roberto Batista, Odilio Benedito Garrido De Assis, Maria Irene Yoshida, Soraia Vilela Borges
Summary: The obtained Kraft lignin microparticles through mechanical treatment were compared with the initial Kraft lignin in terms of their chemical, thermal, and structural properties, showing that the microparticles had lower stability and higher tendency to agglomerate but higher homogeneity. They maintained the characteristic peaks of Kraft lignin and exhibited high antioxidant potential.
CELLULOSE CHEMISTRY AND TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Danielly de Oliveira Begali, Laura Fonseca Ferreira, Ana Carolina Salgado de Oliveira, Soraia Vilela Borges, Alfredo Rodrigues de Sena Neto, Cassiano Rodrigues de Oliveira, Maria Irene Yoshida, Claire I. G. L. Sarantopoulos
Summary: The study demonstrated that incorporating different concentrations of thermoplastic pectin and 4% lignin microparticles can improve the mechanical, optical, and permeability properties of thermoplastic starch films, while enhancing antioxidant activities, making it suitable for oxygen and UV light-sensitive foods.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Polymer Science
Ana Carolina Salgado de Oliveira, Taline Amorim Santos, Julio Cesar Ugucioni, Roney Alves da Rocha, Soraia Vilela Borges
Summary: Chitosan and polyaniline were studied for use as conductive and flexible films in this article. By casting with the addition of glycerol and glutaraldehyde, the films were obtained with improved electrical conductivity and chemical structure.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Chemical
Marali Vilela Dias, Viviane Machado de Azevedo, Laura Fonseca Ferreira, Ana Carolina Salgado de Oliveira, Soraia Vilela Borges, Nilda de Fatima Ferreira Soares, Eber Antonio A. Medeiros, Joao de Deus Souza Carneiro
Summary: The research focused on the effects of tocopherol and modified montmorillonite clay on the properties of chitosan films, demonstrating that they can enhance thermal stability, antioxidant activity, mechanical strength, and water resistance.
JOURNAL OF FOOD PROCESS ENGINEERING
(2021)
Article
Food Science & Technology
Taline Amorim Santos, Beatriz Ribeiro Cabral, Ana Carolina Salgado de Oliveira, Marali Vilela Dias, Cassiano Rodrigues de Oliveira, Soraia Vilela Borges
Summary: This study developed an active biodegradable packaging by incorporating papain into chitosan films reinforced with cellulose nanofibers (CNF). The addition of CNF controlled the release of papain, resulting in good transparency and increased crystallinity of the films, making them suitable for packaging applications requiring slow release of active compounds.
JOURNAL OF FOOD PROCESSING AND PRESERVATION
(2021)
Article
Polymer Science
Natalia Leite Oliveira, Ana Carolina Salgado Oliveira, Sergio Henrique Silva, Adrise Aparecida Rodrigues, Soraia Vilela Borges, Juliano Elvis de Oliveira, Jaime Vilela de Resende
Summary: In this study, Ora-pro-nobis mucilage (MOPN) was added to starch films to improve their mechanical, chemical, and retrogradation properties. The films with added MOPN exhibited enhanced antioxidant capacity and superior mechanical properties. Moreover, they showed good stability and low shrinkage during photodegradation.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Manufacturing
Raissa Alvarenga Carvalho Gomide, Ana Carolina Salgado de Oliveira, Lorena Mendes Rodrigues, Lucas Baldo Luvizaro, Eduardo Mendes Ramos, Cassiano Rodrigues de Oliveira, Soraia Vilela Borges
Summary: The study evaluated the antioxidant activity of whey protein isolate (WPI) films with varying concentrations of lignin microparticles (LMP) during storage at 4 degrees Celsius for 4 days. Results showed an increase in antioxidant activity with higher LMP concentrations, leading to a reduction in oxidation in ground meat. Overall, WPI-based films containing 0.50% w/w of LMP showed promising antioxidant properties for controlling lipid oxidation in ground meat.
PACKAGING TECHNOLOGY AND SCIENCE
(2022)
Article
Engineering, Chemical
Bruna Rage Baldone Lara, Paulo Sergio de Andrade, Ana Carolina Salgado de Oliveira, Mario Guimaraes Junior, Lays Camila Matos, Gustavo Henrique Denzin Tonoli, Marali Vilela Dias
Summary: The study demonstrates that corona treatment improves the adhesion between the two layers of biocomposite films and enhances their wear resistance and ductility. The lamination process and corona treatment increase the affinity of the films with water, resulting in higher permeability.
POLYMER ENGINEERING AND SCIENCE
(2022)