West Pomeranian University of Technology Szczecin, Faculty of Food Sciences and Fisheries, Center of Bioimmobilisation and Innovative Packaging Materials, Janickiego 35, 71-270 Szczecin, Poland; West Pomeranian University of Technology, Szczecin, Faculty of Chemical Technology and Engineering, Polymer Institute, ul. Pulaskiego 10, 70-322 Szczecin, Poland.
Int J Biol Macromol. 2021 Apr 15;176:387-393. doi: 10.1016/j.ijbiomac.2021.02.039. Epub 2021 Feb 10.
Deep eutectic solvents (DES) based on urea (U), polyols (glycerol -G, sorbitol - S) and monosugars (glucose - Glu, fructose - Fru) were obtained, thermally characterized and used for potato starch treatment: dissolution and plasticization. The polysaccharide was dissolved in U/glycerol mixtures forming transparent, non-retrograded gels. The dissolution process was confirmed by microscopic observations and DSC analysis. Plasticizing efficiency of DES in thermoplasticized starch (TPS) via compression molding was investigated using mechanical tests, DMTA, XRD, TGA and FTIR analysis. Although all studied DES were able to plasticize starch effectively, the most flexible films were with urea/glycerol mixture: the highest elongation at break exceed 200%. XRD analysis confirmed high amorphization of starch with the urea-based DES after thermocompression. Moreover, introduction of urea as DES inhibited its recrystallization in the polysaccharide matrix.
基于尿素 (U)、多元醇 (甘油 -G、山梨糖醇 -S) 和单糖 (葡萄糖 -Glu、果糖 -Fru) 的深共晶溶剂 (DES) 已被获得，对其进行了热特性分析并用于马铃薯淀粉处理：溶解和塑化。多糖溶解在 U/甘油混合物中形成透明、非回生凝胶。通过显微镜观察和 DSC 分析确认了溶解过程。通过压缩成型研究了通过机械测试、DMTA、XRD、TGA 和 FTIR 分析在热塑性淀粉 (TPS) 中 DES 的塑化效率。尽管所有研究的 DES 都能够有效地塑化淀粉，但具有尿素/甘油混合物的最柔韧的薄膜：断裂伸长率超过 200%。XRD 分析证实了热压缩后尿素基 DES 对淀粉的高非晶化。此外，将尿素作为 DES 引入到多糖基质中抑制了其再结晶。
