Effect of citric acid on the properties of thermoplastic bitter cassava starch plasticized with isosorbide

Q2 Materials Science Polymers from Renewable Resources Pub Date : 2023-09-25 DOI:10.1177/20412479231202591

Arfiathi Arfiathi, Riska Sumirat, Firda Aulya Syamani, Muhammad Adly Rahandi Lubis, Fitry Filiyanti, Yeyen Nurhamiyah

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Abstract

The rising concern of environmental issues from the non-degradable conventional polymers is triggering the development of sustainable and renewable polymers. Thermoplastic starch (TPS) has been known to have huge potential to substitute conventional synthetic polymers. A thermoplastic starch was prepared using a non-food bitter cassava starch with isosorbide as plasticizer. To improve the dispersion and interfacial affinity of thermoplastic starch and boost the compatibility between starch and isosorbide, citric acid (CA) was used as an additive. The influence of citric acid to the TPS was then investigated. The result shows that citric acid improved tensile strength from 8.68 MPa to 11.98 MPa. The addition of citric acid at a concentration of 1 – 10 wt % can increase glass transition temperature (T g ) from 48.81°C to 63.89°C and storage modulus at 25°C from 1.20 GPa to 3.47 GPa. Two degradation temperatures (T d ) were detected which are T d1 onset value was decrease from 83.32°C down to 79.78°C while T d2 onset value was decrease from 275.29°C down to 247.17°C and T d2 max from 311.12°C to 295.06°C.

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柠檬酸对异山梨酯增塑热塑性苦木薯淀粉性能的影响

不可降解的传统聚合物引起的环境问题日益引起人们的关注，促使可持续和可再生聚合物的发展。热塑性淀粉(TPS)具有取代传统合成聚合物的巨大潜力。以非食用苦木薯淀粉为原料，以异山梨酯为增塑剂，制备了热塑性淀粉。为了改善热塑性淀粉的分散性和界面亲和性，提高淀粉与异山梨酯的相容性，采用柠檬酸(CA)作为添加剂。研究了柠檬酸对TPS的影响。结果表明，加入柠檬酸后，拉伸强度由8.68 MPa提高到11.98 MPa。加入浓度为1 ~ 10 wt %的柠檬酸可使玻璃化转变温度(T g)从48.81℃提高到63.89℃，25℃下的储存模量从1.20 GPa提高到3.47 GPa。检测到两个降解温度(T d)， T d1起始值从83.32℃降至79.78℃，T d2起始值从275.29℃降至247.17℃，T d2最大值从311.12℃降至295.06℃。

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来源期刊

Polymers from Renewable Resources Materials Science-Polymers and Plastics

CiteScore

3.50

自引率

0.00%

发文量

期刊介绍： Polymers from Renewable Resources, launched in 2010, publishes leading peer reviewed research that is focused on the development of renewable polymers and their application in the production of industrial, consumer, and medical products. The progressive decline of fossil resources, together with the ongoing increases in oil prices, has initiated an increase in the search for alternatives based on renewable resources for the production of energy. The prevalence of petroleum and carbon based chemistry for the production of organic chemical goods has generated a variety of initiatives aimed at replacing fossil sources with renewable counterparts. In particular, major efforts are being conducted in polymer science and technology to prepare macromolecular materials based on renewable resources. Also gaining momentum is the utilisation of vegetable biomass either by the separation of its components and their development or after suitable chemical modification. This journal is a valuable addition to academic, research and industrial libraries, research institutions dealing with the use of natural resources and materials science and industrial laboratories concerned with polymer science.