明胶在两种低共熔溶剂中的溶解及再生结构比较

doi:10.19677/j.issn.1004-7964.2021.05.001

皮革科学与工程 ›› 2021, Vol. 31 ›› Issue (5): 1-5.doi: 10.19677/j.issn.1004-7964.2021.05.001

• 试验研究 • 下一篇

明胶在两种低共熔溶剂中的溶解及再生结构比较

吴婷^1,2, 徐浩杰^1,2, 崔玉明^1,2, 尤芳芳³, 陈慧^1,2,*

1.四川大学轻工科学与工程学院,四川成都 610065;
2.四川大学皮革化学与工程教育部重点实验室,四川成都 610065;
3.洛阳海关综合技术服务中心,河南洛阳 471000

收稿日期:2021-03-09 出版日期:2021-10-28 上线日期:2021-10-08
通讯作者: *chenh@scu.edu.cn
作者简介:吴婷（1998-）,女,硕士研究生。
基金资助:
四川省成都市科技项目（2018-YF05-01219-SN）;皮革化学与工程教育部重点实验室（四川大学）开放课题基金资助（20826041D4237）;四川大学大学生创新创业训练计划项目（C2021116145）

Comparison of Dissolution and Regeneration Structures of Gelatin with Two Deep Eutectic Solvents

WU Ting^1,2, XU Haojie^1,2, CUI Yuming^1,2, YOU Fangfang³, CHEN Hui^1,2,*

1. College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China;
2. Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China;
3. Luoyang Customs Integrated Technical Service Center, Luoyang 471000, China

Received:2021-03-09 Online:2021-10-28 Published:2021-10-08

摘要/Abstract

摘要： 以合成的三水乙酸钠（SAT）-尿素和氯化胆碱（ChCl）-二水合草酸（H₂C₂O₄·2H₂O）两种低共熔溶剂（DES）来研究明胶溶解再生前后结构和性能的变化。结果表明,SAT-尿素DES和ChCl-H₂C₂O₄·2H₂O DES的最佳配比分别为n(SAT)/n(尿素)=0.67、n(ChCl)/n(H₂C₂O₄·2H₂O)=1.00。两种DES溶解明胶没有造成明胶化学分子结构的变化,而是在一定程度上破坏了明胶分子间的氢键作用,导致结晶度和热稳定性略微降低。而SAT-尿素DES与明胶形成氢键的能力更强,破坏明胶分子间氢键的程度更高,但对三螺旋构象破坏程度较低,因此更适合溶解明胶。

关键词: 低共熔溶剂, 明胶, 溶解, 再生, 性能

Abstract: Two deep eutectic solvents (DES), sodium acetate trihydrate (SAT)-urea and choline chloride (ChCl)-oxalic acid dihydrate (H₂C₂O₄·2H₂O), were synthesized assolventsto dissolve gelatin.The differenceinstructure and property of gelatin before and after regeneration was investigated. The result indicated that the optimum stoichiometric ratios of SAT-urea DES and ChCl-H₂C₂O₄·2H₂O DES weren(SAT)/n(urea)=0.67 and n(ChCl)/n(H₂C₂O₄·2H₂O)=1.00, respectively. The chemical molecular structure of gelatin was not changed by DES, but the hydrogen bondsamong gelatin molecules were destroyed to some extent, leading to slightly lower crystallinity and thermal stability.SAT-urea DES had a stronger ability to form hydrogen bonds with gelatin and a higher degree to break the intermolecular hydrogen bonds of gelatin, but the damage degree of the tri-helix conformation was relatively low, so it was more suitable for dissolving gelatin.

Key words: deep eutectic solvent, gelatin, dissolution, regeneration, property

中图分类号:

TS512

吴婷, 徐浩杰, 崔玉明, 尤芳芳, 陈慧. 明胶在两种低共熔溶剂中的溶解及再生结构比较[J]. 皮革科学与工程, 2021, 31(5): 1-5.

WU Ting, XU Haojie, CUI Yuming, YOU Fangfang, CHEN Hui. Comparison of Dissolution and Regeneration Structures of Gelatin with Two Deep Eutectic Solvents[J]. Leather Science and Engineering, 2021, 31(5): 1-5.

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明胶在两种低共熔溶剂中的溶解及再生结构比较

Comparison of Dissolution and Regeneration Structures of Gelatin with Two Deep Eutectic Solvents

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