深共晶溶剂作为淀粉的增塑和交联剂。

Deep eutectic solvents as simultaneous plasticizing and crosslinking agents for starch.

机构信息

West Pomeranian University of Technology, Faculty of Chemical Technology and Engineering, Polymer Institute, Ul. Pulaskiego 10, 70-322 Szczecin, Poland.

West Pomeranian University of Technology, Faculty of Mechanical Engineering and Mechatronics, Institute of Materials Engineering, Al. Piastow 10, 70-310 Szczecin, Poland.

出版信息

Int J Biol Macromol. 2019 May 15;129:1040-1046. doi: 10.1016/j.ijbiomac.2019.02.103. Epub 2019 Feb 19.

DOI:10.1016/j.ijbiomac.2019.02.103

PMID:30790640

Abstract

The aim of this work was to prepare deep eutectic solvents (DES) made with choline salts with α-hydroxylate anions and glycerol and apply them as starch plasticizers. Additionally, crosslinking potential of polyfunctional anions from the salts was investigated. Starch/DES premixtures were rheologically and thermally (DSC, TGA) analyzed. Thermoplastic starch (TPS)/DES films were prepared via thermocompression molding. Influence of choline salt to glycerol molar ratio, type of anion and compression parameters on mechanical, dynamic mechanical, thermal and sorption properties as well as structural morphology (XRD, FTIR analysis) was studied. DES containing citrate anion exhibited parallel crosslinking and plasticizing ability of polysaccharide matrix as applied techniques confirmed. The higher choline citrate (CCit) content in DES the higher tensile strength, more amorphous structure and lower sorption degree to CCit:G 1:6 M ratio. XRD revealed that TPS/CCit-based DES films did not retrograde even after one year of storage. The best compression parameters for studied systems were: 140 °C, 12 tons, 10 min.

摘要

本工作旨在制备以胆碱盐和甘油为原料的具有α-羟基阴离子的深共熔溶剂（DES），并将其用作淀粉增塑剂。此外，还研究了盐中多官能阴离子的交联潜力。对淀粉/DES 预混合物进行了流变学和热学（DSC、TGA）分析。通过热压成型制备了热塑性淀粉（TPS）/DES 薄膜。研究了胆碱盐与甘油摩尔比、阴离子类型和压缩参数对机械性能、动态力学性能、热性能和吸湿性以及结构形态（XRD、FTIR 分析）的影响。应用技术证实，含有柠檬酸盐阴离子的 DES 具有多糖基质的交联和增塑能力。DES 中柠檬酸盐的含量越高，拉伸强度越高，无定形结构越多，对 CCit:G 1:6M 比的吸湿性越低。XRD 表明，即使在储存一年后，基于 TPS/CCit 的 DES 薄膜也不会回生。研究体系的最佳压缩参数为：140°C，12 吨，10 分钟。