基于硫脲复合溶剂体系制备再生冷水可溶性淀粉

doi:10.19677/j.issn.1004-7964.2020.04.003

皮革科学与工程 ›› 2020, Vol. 30 ›› Issue (4): 13-16.doi: 10.19677/j.issn.1004-7964.2020.04.003

基于硫脲复合溶剂体系制备再生冷水可溶性淀粉

朱云燕^1,2, 戴睿¹, 陈慧^1,2,*

1.四川大学轻工科学与工程学院,四川成都 610065;
2.四川大学制革清洁技术国家工程实验室,四川成都 610065

收稿日期:2020-02-19 出版日期:2020-08-28 上线日期:2020-07-26
通讯作者: * 陈慧,女,博士,副教授,研究方向：废弃物处理、生物质材料改性及功能化研究,E-mail: chenh@scu.edu.cn。
作者简介:朱云燕（1996-）,女,硕士研究生,研究方向：生物质材料改性与应用,E-mail: zyun_yan@163.com。
基金资助:
四川大学研究生院项目（GSSCU2018028）; 成都市科技项目（2018-YF05-01219-SN）; 四川省科技项目（2019YFG0269）

Preparation of Regenerated Cold-water-soluble Starch by Thiourea Composite Solvent System

ZHU Yunyan^1,2, DAI Rui¹, CHEN Hui^1,2,*

1. College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China;
2. National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China

Received:2020-02-19 Published:2020-08-28 Online:2020-07-26

摘要/Abstract

摘要： 采用硫脲复合溶剂体系溶解马铃薯淀粉（PS）,通过水提醇沉法分离提纯后,烘箱干燥制备再生冷水可溶性淀粉（RCWSS-T）。结果表明：硫脲复合溶剂体系所得的RCWSS-T冷水溶解度达到43.50%;FTIR分析表明该体系制备RCWSS-T过程中没有新的化学键生成;XRD结果表明PS的晶体结构由最初的双螺旋B型变为RCWSS-T的单螺旋V型;SEM分析表明其颗粒尺寸明显减小。与尿素复合溶剂体系相比,硫脲复合溶剂体系下所得RCWSS-T的冷水溶解度更低,其原因可能是硫脲削弱淀粉分子间及分子内氢键的能力不如尿素,与淀粉形成氢键的稳定性也不如尿素。

关键词: 硫脲, 复合溶剂体系, 尿素, 水提醇沉法, 再生冷水可溶性淀粉

Abstract: The regenerated cold-water-soluble starch (RCWSS-T) was prepared by dissolving potato starch (PS) using the thiourea composite solvent system. RCWSS-T was separated and purified by the water-extraction and alcohol-precipitation method, followed by the drying in the oven. The cold-water solubility was improved to be 43.50% for the obtained RCWSS-T. Results of FTIR analysis indicated that no new chemical bond was formed during the preparation period of RCWSS-T. XRD results showed that the crystal structure changed from the original double helix B type in PS into the single helix V type in RCWSS-T. SEM analysis confirmed that RCWSS-T exhibited much smaller particle size than PS. However, compared to the urea composite solvent system, the thiourea composite solvent system led to RCWSS-T with lower cold-water solubility. The possible reason is that thiourea has the less ability than urea to weaken the intermolecular and intramolecular hydrogen bonds in starch, and the hydrogen bonds formed between thiourea and starch are also less stable than the ones in the case of urea.

Key words: thiourea, composite solvent system, urea, water-extraction and alcohol-precipitation method, regenerated cold-water-soluble starch

中图分类号:

TS236.9

朱云燕, 戴睿, 陈慧. 基于硫脲复合溶剂体系制备再生冷水可溶性淀粉[J]. 皮革科学与工程, 2020, 30(4): 13-16.

ZHU Yunyan, DAI Rui, CHEN Hui. Preparation of Regenerated Cold-water-soluble Starch by Thiourea Composite Solvent System[J]. Leather Science and Engineering, 2020, 30(4): 13-16.

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基于硫脲复合溶剂体系制备再生冷水可溶性淀粉

Preparation of Regenerated Cold-water-soluble Starch by Thiourea Composite Solvent System

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