A natural butter glyceride as a plasticizer for improving thermal, mechanical, and biodegradable properties of poly(lactide acid).
A natural butter glyceride as a plasticizer for improving thermal, mechanical, and biodegradable properties of poly(lactide acid).
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DOI：
10.1016/j.ijbiomac.2024.130366
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发表时间：
2024-02
影响因子：
8.2
通讯作者：
Yufa Sun;Gang Sun
中科院分区：
文献类型：
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作者：
Yufa Sun;Gang Sun
聚乳酸（PLA）是一种生物基、可生物降解的热塑性聚酯，具有很大的替代石油基塑料的潜力。然而，聚乳酸韧性差、生物降解速度慢等缺点影响了其在许多领域的广泛应用。在这项研究中，甘油三酸酯存在于天然黄油，甘油三丁酸酯，创造性地探索和以前研究的三乙酸甘油酯和柠檬酸三丁酯相比，作为潜在的增塑剂的聚乳酸，以实现改善的机械性能和生物降解性能。通过汉森溶解度参数（HSP）定量评价了这些药物与聚乳酸的相容性，并采用不同的测试方法进行了测量。将这些化合物以1 - 30%的不同含量掺入PLA中，一致地改变了热性能、机械性能和生物降解性能，并系统地研究了这些试剂的化学结构和性能的关系和影响。结果表明，甘油三丁酸酯是一种新型的聚乳酸增塑剂，它的加入不仅有效地降低了聚乳酸的玻璃化转变温度、冷结晶温度、熔融温度和杨氏模量，而且显著提高了聚乳酸的酶降解速率。该研究为可持续和生态友好的食品级塑化PLA产品的开发铺平了道路。
Polylactic acid (PLA) is a biobased and biodegradable thermoplastic polyester with great potential to replace petroleum-based plastics. However, its poor toughness and slow biodegradation rate affect broad applications of PLA in many areas. In this study, a glycerol triester existing in natural butter, glycerol tributyrate, was creatively explored and compared with previously investigated triacetin and tributyl citrate, as potential plasticizers of PLA for achieving improved mechanical and biodegradation performances. The compatibilities of these agents with PLA were assessed quantitively via the Hansen solubility parameter (HSP) and measured by using different testing methods. The incorporation of these compounds with varied contents ranging from 1 to 30 % in PLA altered thermal, mechanical, and biodegradation properties consistently, and the relationship and impacts of chemical structures and properties of these agents were systematically investigated. The results demonstrated that glycerol tributyrate is a novel excellent plasticizer for PLA and the addition of this triester not only effectively reduced the glass transition, cold crystallization, and melting temperatures and Young's modulus, but also led to a significant improvement in the enzymatic degradation rate of the plasticized PLA. This study paves a way for the development of sustainable and eco-friendly food grade plasticized PLA products.