Synthesis and Characterization of Bioinspired Chitin Nanofiber/Gelatin Hydrogels with High Mechanical Properties

被引：0
作者：
Chen C. [1 ]
Wu Q. [1 ]
Wang Y. [1 ]
Hu M. [1 ]
Yan S. [1 ]
Zhang Y. [1 ]
Li D. [1 ]
机构：
[1] College of Materials Science and Engineering, Nanjing Forestry University, Nanjing
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2020年 / 36卷 / 08期
关键词：
Bioinspired hydrogel; Chitin nanofiber; Gelatin; Quinone cross-linking; Tensile properties;
D O I：
10.16865/j.cnki.1000-7555.2020.0195
中图分类号：
学科分类号：
摘要：
Inspired by the "quinone hardening" process during the natural sclerotization of insect cuticles, high-strength hydrogels (S-ChNF/G-nCu) were fabricated via the combination of chitin nanofiber and gelatin under neutral hydroquinone (HQ)/copper (Cu[II]) solutions. Since the quinone cross-linking reacts between amino groups, by increasing the amino group content on the chitin crystalline surface through alkali treatment, surface-deacetylated chitin nanofibers (SD-ChNFs) were prepared to facilitate the cross-linking reaction between SD-ChNF and gelatin. Furthermore, by adjusting the content of Cu[II] (which acted as catalyst in the quinone crosslinking reaction), tensile properties of the fabricated S-ChNF/G-nCu hydrogels could be modified. The results show that when the content of Cu[II] is 6 mg, the tensile strength and elastics modulus of the prepared S-ChNF/G-6Cu hydrogel is nearly 3 times and 14 times higher than those of the cooling-treated (S-ChNF/G) hydrogel, respectively. © 2020, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：152 / 157
页数：5
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