Facile method to improve toughness and biodegradability of polylactide by modified CaCO3

IF 2.2 4区化学 Q3 CHEMISTRY, PHYSICAL

Colloid and Polymer Science Pub Date : 2024-10-28 DOI:10.1007/s00396-024-05344-w

Yihan Liu, Hongwei Pan, Junjia Bian, Zhigang Liu, Yan Zhao, Huili Yang, Huiliang Zhang

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Abstract

In this study, an aluminate coupling agent (ACA) was utilized to modify calcium carbonate (CaCO₃) particles, producing modified CaCO₃ (Al-CaCO₃) particles, which were subsequently employed as inorganic fillers to enhance the toughness of polylactide (PLA). PLA/Al-CaCO₃ composites were prepared through melt mixing, with the reaction between ACA and CaCO₃ confirmed by Fourier transform infrared (FTIR) spectroscopy. The mechanical, thermal, and biodegradation properties of these composites were thoroughly investigated. The addition of Al-CaCO₃ significantly enhanced the mechanical properties, with impact strength reaching approximately 9.7 kJ/m², a 143% increase compared to neat PLA. The elongation at break also improved dramatically, rising from 7.5 to 34%, representing a 350% increase over neat PLA. Al-CaCO₃ particles demonstrated good dispersibility and strong interfacial interaction within the PLA matrix. Differential scanning calorimetry (DSC) results showed that Al-CaCO₃ enhanced the crystallization behavior of PLA, promoting the formation of more perfect crystals. Additionally, biodegradation tests revealed that the PLA/Al-CaCO₃ composites exhibited excellent biodegradation properties. The combined toughening and biodegradation properties of PLA/Al-CaCO₃ broaden the potential applications of PLA.

Graphical Abstract

Abstract Image

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用改性CaCO3提高聚乳酸韧性和生物降解性的简易方法

在这项研究中，利用铝酸盐偶联剂（ACA）对碳酸钙（CaCO₃）颗粒进行改性，得到改性的CaCO₃（Al-CaCO₃）颗粒，随后将其用作无机填料来增强聚乳酸（PLA）的韧性。采用熔融混合法制备了PLA/Al-CaCO₃复合材料，并通过傅里叶变换红外光谱（FTIR）证实了ACA与CaCO₃的反应。研究了这些复合材料的力学、热学和生物降解性能。Al-CaCO₃的加入显著提高了PLA的力学性能，冲击强度达到约9.7 kJ/m2，比纯PLA提高了143%。断裂伸长率也显著提高，从7.5%提高到34%，比纯PLA提高了350%。Al-CaCO₃颗粒在PLA基体内具有良好的分散性和较强的界面相互作用。差示扫描量热法（DSC）结果表明，Al-CaCO₃增强了PLA的结晶行为，促进了更完美晶体的形成。此外，生物降解测试表明PLA/Al-CaCO₃复合材料具有优异的生物降解性能。PLA/Al-CaCO₃的复合增韧和生物降解性能拓宽了PLA的应用前景。图形抽象

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来源期刊

Colloid and Polymer Science 化学-高分子科学

CiteScore

4.60

自引率

4.20%

发文量

111

审稿时长

2.2 months

期刊介绍： Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.