文献类型：期刊文献

英文题名：Toughened and water-resistant starch/TiO2 bio-nanocomposites as an environment-friendly food packaging material

作者：Xiong, Jiaoyang[1];Sheng, Caihong[1];Wang, Quan[1];Guo, Weihong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Preparat & Applicat Ultrafine Mat, Minist Educ,Polymer Proc Lab, Shanghai 200237, Peoples R China

年份：2019

卷号：6

期号：5

外文期刊名：MATERIALS RESEARCH EXPRESS

收录：;EI(收录号：20191106632184);WOS:【SCI-EXPANDED(收录号:WOS:000459573100009)】；

语种：英文

外文关键词：nano-TiO2; starch; environment-friendly; water-resistance; packaging; nano-composite

摘要：Poor mechanical properties and moisture sensitivity limit the application of starch-based bio-material. Starch/titanium dioxide (TiO2) bio-nanocomposites were prepared by blending. Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) results stated that more stable hydrogen bonds formed between nano-TiO2 and starch with increased nano-TiO2 content, which was explained by schematic diagrams. The moisture content reduced from 23% to 13% and the contact angle increased from 43 degrees to 85 degrees, indicating that nano-TiO2 brought better water-resistance and higher hydrophobicity to starch/TiO2 bio-nanocomposites. The onset temperature of thermal degradation shifted from 119 degrees C to 174 degrees C, which exhibited the improved thermal stability of starch/TiO2 bio-nanocomposites. The results of x-ray diffraction (XRD) showed the recrystallization of starch molecular was restricted. Besides, there was a big growth of elongation at break from 109% to 293%, proving a better mechanical property. The starch/TiO2 bio-nanocomposite could be used as an eco-friendly food packaging material with simple preparation technology and better performance.