Journal ArticleDOI
Structure and properties of chitosan films: Effect of the type of solvent acid
TLDR
In this article, the influence of acid type on the structure and properties of chitosan films was studied by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and differential scanning calorimetry (DSC).Abstract:
The properties of chitosan films can be modified by changing the solvent type, attributing to the different interaction patterns between chitosan and acids. However, little is known about how these interactions affect the structure and properties of chitosan films. In this work, the influence of acid type on the structure and properties of chitosan films was studied by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). FTIR spectra showed that the ionic interactions and hydrogen bonding could occur between chitosan and acid ions. Structural analysis revealed that chitosan was partially crystalline in hydrochloric and acetic acid films, whereas it was amorphous in lactic and citric acid films. DSC result indicated that the glass transition temperature of chitosan was much lower in citric acid film with low water content than in all the other films, suggesting that the citrate ions interacted more strongly with chitosan. A melting transition appeared in hydrochloric and acetic acid films. In addition, the tensile strength of these films decreased with an increase in the volume of acid. These observations indicate that the choice of a proper solvent for chitosan may be desirable for certain special applications.read more
Citations
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Physical properties and bioactivities of chitosan/gelatin-based films loaded with tannic acid and its application on the preservation of fresh-cut apples
Changcai Zhang,Zhikun Yang,Jiyong Shi,Xiaobo Zou,Xiaodong Zhai,Huang Xiaowei,Li Zhihua,Melvin Holmes,Maria Daglia,Jianbo Xiao +9 more
TL;DR: In this article, the authors developed composite (CG-TA) films by using chitosan (CS)/gelatin (GL)/tannic acid (TA), for fresh-cut apples preservation.
Journal ArticleDOI
Chitosan-riboflavin composite film based on photodynamic inactivation technology for antibacterial food packaging.
TL;DR: In this paper, the authors applied photodynamic inactivation to food packaging, where chitosan (CS) films containing photosensitizing riboflavin (RB) were prepared via solution casting.
Journal ArticleDOI
Chitosan-based membranes preparation and applications: Challenges and opportunities
TL;DR: Chitosan is an abundant natural biopolymer which finds a variety of applications due to its functionalization extending to pharmacology, controlled drug delivery, healing materials, biomedical engineering, food industry, agriculture, catalysis, biosorbents, wastewater treatment, etc as discussed by the authors.
Journal ArticleDOI
Double Network Gelatin/Chitosan Hydrogel Effective Removal of Dyes from Aqueous Solutions
Journal ArticleDOI
Chitosan membranes from acetic acid and imidazolium ionic liquids: Effect of imidazolium structure on membrane properties
Huiwen Zhang,Mengke Kong,Qianwen Jiang,Kehui Hu,Mai Ouyang,Fei Zhong,Mengyi Qin,Linghua Zhuang,Guowei Wang +8 more
TL;DR: In this article, mixed solvent systems of an acetic acid aqueous solution with different imidazolium ionic liquids were developed for successful chitosan dissolution at room temperature.
References
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Journal ArticleDOI
Chitin and chitosan: Properties and applications
TL;DR: Chitin is the second most important natural polymer in the world as mentioned in this paper, and the main sources of chitin are two marine crustaceans, shrimp and crabs, which are used for food, cosmetics, biomedical and pharmaceutical applications.
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Chitin and chitosan polymers: Chemistry, solubility and fiber formation
TL;DR: In this paper, a review discusses the various attempts reported on solving this problem from the point of view of the chemistry and the structure of these polymers highlighting the drawbacks and advantages of each method and proposes that based on considerations of structure-property relations, it is possible to obtain chitin fibers with improved strength by making use of their nanostructures and/or mesophase properties of chitins.
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Effects of hydrophilic plasticizers on mechanical, thermal, and surface properties of chitosan films.
TL;DR: It is found that GLY and PEG are more suitable as chitosan plasticizers than EG and PG by taking into account their plasticization efficiency and storage stability, and plasticization increases film hydrophilicity.
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Preparation and functional properties of fish gelatin-chitosan blend edible films.
TL;DR: The structural properties investigated by FTIR and DSC showed a clear interaction between fish gelatin and Ch, forming a new material with enhanced mechanical properties, indicating that films are very transparent while they have excellent barrier properties against UV light.
Journal ArticleDOI
Characteristics of Different Molecular Weight Chitosan Films Affected by the Type of Organic Solvents
TL;DR: In this paper, chitosan films were prepared using 3 chitoshan molecular weights and 4 organic acid solvents without plasticizer, and the results showed that tensile strength and elongation increased with the molecular weight.