Effects of Different Dissolution and Regeneration Methods on the Structure and Properties of Chitosan Film

被引：0

作者：

Wang, Yuntao ^{[1
]}

Liu, Rongqin ^{[1
]}

Zhang, Wenshu ^{[1
]}

Feng, Jingying ^{[1
]}

Wang, Xuran ^{[1
]}

Bai, Yanhong ^{[1
]}

机构：

[1] Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Henan Province Collaborative Innovation Center of Food Production and Safety, College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou

来源：

Shipin Kexue/Food Science | 2024年 / 45卷 / 20期

关键词：

alkali-urea system; chitosan; high-strength chitosan film; microstructure;

D O I：

10.7506/spkx1002-6630-20231218-142

中图分类号：

学科分类号：

摘要：

In this study, the effects of three different preparation methods, acid dissolution followed by alkali regeneration (CS-Na), alkali-urea dissolution followed by hot water regeneration (CS-60 ℃), and alkali dissolution followed by alcohol regeneration (CS-C2H6O) on the properties (mechanical strength, light transmittance, water vapor transmission rate (WVTR)) and structure (groups, crystalline structure and microstructure) of chitosan film were investigated. It was found that the tensile strength of the CS-Na film was 0.064 MPa, and the elongation at break was 34.72%. The tensile strength and elongation at break of the two chitosan films prepared with alkali-urea system were significantly improved, indicating better mechanical properties. All three chitosan films had excellent ultraviolet (UV) barrier capacity; the CS-C2H6O film had the highest UV transmittance, the CS-60 ℃ film was in the middle, and the CS-Na film had the lowest UV transmittance. The WVTR of these films under saturated NaCl and MgCl2 conditions decreased in the following order: CS-60 ℃ < CS-C2H6O < CS-Na, indicating that the CS-60 ℃ film had the best water vapor barrier capacity. The results of Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) indicated that alkali-urea system could enhance the hydrogen bonding between chitosan molecules to the largest extent. Molecular chain rearrangement occurred in all these chitosan films during the dissolution-regeneration process, and hot water bath at 60 ℃ was more conducive to the formation of nanofiber structure in chitosan films. Scanning electron microscopy (SEM) results suggested that the cross-section of CS-60 ℃ presented a denser and more uniform porous structure. Moreover, the surface of this film was much smoother than that of the CS-C2H6O and CS-Na films. Overall, the CS-60 ℃ film had better mechanical properties and a more uniform porous structure, and therefore could have better application prospects in the field of food packaging. © 2024 Chinese Chamber of Commerce. All rights reserved.

引用

页码：214 / 219

页数：5

共 25 条

[1]

ZHANG Q, CHEN Y J, WEI P D, Et al., Extremely strong and tough chitosan films mediated by unique hydrated chitosan crystal structures, Materials Today, 51, pp. 27-38, (2021)

[2]

PRIYADARSHI R, SAURAJ, KUMAR B, Et al., Chitosan films incorporated with apricot (Prunus armeniaca) kernel essential oil as active food packaging material, Food Hydrocolloids, 85, pp. 158-166, (2018)

[3]

BAJER D, BURKOWSKA-BUT A., Innovative and environmentally safe composites based on starch modified with dialdehyde starch, caffeine, or ascorbic acid for applications in the food packaging industry, Food Chemistry, 374, (2022)

[4]

BAKSHI P S, SELVAKUMAR D, KADIRVELU K, Et al., Chitosan as an environment friendly biomaterial: a review on recent modifications and applications, International Journal of Biological Macromolecules, 150, pp. 1072-1083, (2020)

[5]

LU Z B, ZOU L, ZHOU X M, Et al., High strength chitosan hydrogels prepared from NaOH/urea aqueous solutions: the role of thermal gelling, Carbohydrate Polymers, 297, (2022)

[6]

DUAN B, HUANG Y, LU A, Et al., Recent advances in chitin based materials constructed via physical methods, Progress in Polymer Science, 82, pp. 1-33, (2018)

[7]

LI J H, HAO Z Z, WANG B J, Et al., High-tensile chitin films regenerated from cryogenic aqueous phosphoric acid, Carbohydrate Polymers, 312, (2023)

[8]

QIAO C D, MA X G, WANG X J, Et al., Structure and properties of chitosan films: effect of the type of solvent acid, LWT-Food Science and Technology, 135, (2021)

[9]

PILLAI C K S, PAUL W, SHARMA C P., Chitin and chitosan polymers: chemistry, solubility and fiber formation, Progress in Polymer Science, 34, 7, pp. 641-678, (2009)

[10]

MEHTA B B, JOSHI R N, RAVAL H D., A novel ultra-low energy reverse osmosis membrane modified by chitosan with glutaraldehyde crosslinking, Journal of Applied Polymer Science, 135, 10, (2018)

← 1 2 3 →