Effect of chitosan concentration on physicochemical properties of starch-based biodegradable drinking straws by extrusion

IF 1.8 4区材料科学 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Green Materials Pub Date : 2022-08-23 DOI:10.1680/jgrma.22.00021

Wendong Fan, Jing Zhao, Houru Zong, Quanhong Li

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引用次数: 0

Abstract

As disposable plastic straws were banned in China, more biodegradable straws were invented. Under high temperature and pressure conditions, starch is pasted and the molecular hydrogen bonds between starch are broken. After adding chitosan, chitosan and starch can form new hydrogen bonds. Biodegradable starch-based straws were made from cassava starch and rice starch (weight ratio = 1:1) by extrusion technique. Chitosan (0%, 5%, 10%, 15% and 20%) was added to improve the mechanical properties of the straws and the effect of chitosan on the chemical, mechanical and water resistance properties of the starch-based straws was investigated. Color, transparency and water resistance of CR/CH (tapioca starch, rice starch and chitosan) straws containing different levels of chitosan. The color and water resistance of straws containing different levels of chitosan were superior to those of CR (tapioca and rice starch). The best mechanical properties and water resistance of starch-based straws were obtained when the chitosan addition was 5%. The addition of chitosan flattened the appearance of the starch-based straws and improved the mechanical properties and water resistance of the straws. The above structure can provide a reference for the application of starch-based materials.

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壳聚糖浓度对挤压法制备淀粉基生物可降解吸管理化性能的影响

随着一次性塑料吸管在中国被禁止，更多可生物降解的吸管被发明出来。在高温高压条件下，淀粉被粘贴，淀粉之间的分子氢键被破坏。加入壳聚糖后，壳聚糖和淀粉可以形成新的氢键。以木薯淀粉和大米淀粉（重量比为1:1）为原料，采用挤压成型技术制备了可生物降解的淀粉基吸管。添加0%、5%、10%、15%和20%的壳聚糖以改善秸秆的力学性能，研究了壳聚糖对淀粉基秸秆的化学性能、力学性能和耐水性能的影响。不同壳聚糖含量的CR/CH（木薯淀粉、大米淀粉和壳聚糖）吸管的颜色、透明度和耐水性。不同壳聚糖含量的稻草的色泽和耐水性均优于木薯淀粉和大米淀粉。当壳聚糖的添加量为5%时，淀粉基吸管的力学性能和耐水性最好。壳聚糖的加入使淀粉基吸管的外观变平，提高了吸管的力学性能和耐水性。以上结构可为淀粉类材料的应用提供参考。

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来源期刊

Green Materials Environmental Science-Pollution

CiteScore

3.50

自引率

15.80%

发文量

期刊介绍： The focus of Green Materials relates to polymers and materials, with an emphasis on reducing the use of hazardous substances in the design, manufacture and application of products.