用粘土纳米填料增强挤压加工生物基复合材料的降解研究

Biomass Pub Date : 2024-07-01 DOI:10.3390/biomass4030036
Ahmed Tara, Mouhja Bencharki, A. Gainvors-Claisse, Françoise Berzin, Omar Jbara, S. Rondot
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引用次数: 0

摘要

本研究调查了基于挤压技术的纳米复合材料的制造和表征,这些复合材料由生物来源的聚丙烯(PP)和聚丁二酸丁二醇酯(PBS:一种可生物降解的聚合物,从玉米或甘蔗等可再生生物质来源中提取)制成,并加入了 Cloisite 20 (C20) 粘土纳米填料,重点关注其在电气绝缘应用中的适用性。研究包括利用真菌 Phanerochaete chrysosporium 进行生物降解测试,以评估成分和挤压条件的影响。这些测试取得了令人满意的结果,显示出 PBS 相逐渐消失,扫描电子显微镜(SEM)的观察结果和与 PBS 中 C-OH 和 C-O-C 键相关的傅立叶变换红外光谱(FTIR)峰值强度的降低也证实了这一点。尽管粘土对各种性能(如阻隔性、热性能、电性能和机械性能等)都有积极影响,但粘土含量高(5 wt%)似乎并不能显著提高生物降解性,这突出表明了 PBS 相在此过程中对添加粘土的特殊敏感性。这项研究为了解影响纳米复合材料生物降解过程的各种因素之间复杂的相互作用提供了宝贵的见解,并强调了采用综合方法了解这些过程的必要性。这是首次利用含有 PBS 的部分生物来源材料,重点研究用于电气绝缘的纳米复合材料的降解过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigating Degradation in Extrusion-Processed Bio-Based Composites Enhanced with Clay Nanofillers
This research investigates the extrusion-based fabrication and characterization of nanocomposites derived from bio-sourced polypropylene (PP) and poly(butylene succinate) (PBS: a biodegradable polymer derived from renewable biomass sources such as corn or sugarcane), incorporating Cloisite 20 (C20) clay nanofillers, with a specific focus on their suitability for electrical insulation applications. The research includes biodegradation tests employing the fungus Phanerochaete chrysosporium to evaluate the impact of composition and extrusion conditions. These tests yield satisfactory results, revealing a progressive disappearance of the PBS phase, as corroborated by scanning electron microscopy (SEM) observations and a reduction in the intensity of Fourier transform infrared spectroscopy (FTIR) peaks associated with C-OH and C-O-C bonds in PBS. Despite positive effects on various properties (i.e., barrier, thermal, electrical, and mechanical properties, etc.), a high clay content (5 wt%) does not seem to enhance biodegradability significantly, highlighting the specific sensitivity of the PBS phase to the addition of clay during this process. This study provides valuable insights into the complex interplay of factors conditioning nanocomposite biodegradation processes and highlights the need for an integrated approach to understanding these processes. This is the first time that research has focused on studying the degradation of nanocomposites for electrical insulation, utilizing partially bio-sourced materials that contain PBS.
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