使用反应性环氧树脂增强竹浆聚乳酸复合材料

Bamboo Pulp Toughening Poly (Lactic Acid) Composite Using Reactive Epoxy Resin.

作者信息

Kiattipornpithak Krittameth, Rachtanapun Pornchai, Thanakkasaranee Sarinthip, Jantrawut Pensak, Ruksiriwanich Warintorn, Sommano Sarana Rose, Leksawasdi Noppol, Kittikorn Thorsak, Jantanasakulwong Kittisak

机构信息

School of Agro-Industry, Faculty of Agro-Industry, Chiang Mai University, Mae-Hea, Mueang, Chiang Mai 50100, Thailand.

Cluster of Agro Bio-Circular-Green Industry, Faculty of Agro-Industry, Chiang Mai University, Chiang Mai 50100, Thailand.

出版信息

Polymers (Basel). 2023 Sep 17;15(18):3789. doi: 10.3390/polym15183789.

DOI:10.3390/polym15183789

PMID:37765643

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10537309/

Abstract

A novel poly (lactic acid) (PLA) composite with excellent mechanical properties, toughness, thermal stability, and water resistance was developed using a reactive melt-blending technique. PLA was melt mixed with epoxy resin (EPOXY) and bamboo pulp (PULP) to improve its reaction and mechanical properties. FTIR analysis confirmed the successful reaction of the PLA/EPOXY/PULP composites; the epoxy groups of EPOXY reacted with the -COOH groups of PLA and the -OH groups of PULP. The PLA/EPOXY/PULP5 composite showed a high tensile strength (67 MPa) and high toughness of 762 folding cycles, whereas the highest tensile strength was 77 MPa in the PLA/EPOXY5/PULP20 sample. SEM images presented a gap between the PLA and PULP; gap size decreased with the addition of EPOXY. The T of the PLA decreased with the EPOXY plasticizer effect, whereas the T did not significantly change. PULP induced crystallinity and increased Vicat softening of the PLA/PULP and PLA/EPOXY/PULP composites. The EPOXY reaction of the PLA/PULP composites improved their tensile properties, toughness, thermal stability, and water resistance.

摘要

采用反应性熔融共混技术制备了一种具有优异机械性能、韧性、热稳定性和耐水性的新型聚乳酸（PLA）复合材料。将PLA与环氧树脂（EPOXY）和竹浆（PULP）熔融混合以改善其反应性能和机械性能。傅里叶变换红外光谱（FTIR）分析证实了PLA/EPOXY/PULP复合材料的成功反应；EPOXY的环氧基团与PLA的-COOH基团以及PULP的-OH基团发生了反应。PLA/EPOXY/PULP5复合材料表现出较高的拉伸强度（67 MPa）和762次折叠循环的高韧性，而在PLA/EPOXY5/PULP20样品中最高拉伸强度为77 MPa。扫描电子显微镜（SEM）图像显示PLA和PULP之间存在间隙；随着EPOXY的加入，间隙尺寸减小。由于EPOXY的增塑作用，PLA的玻璃化转变温度（Tg）降低，而熔点（Tm）没有显著变化。PULP诱导了PLA/PULP和PLA/EPOXY/PULP复合材料的结晶度并提高了维卡软化温度。PLA/PULP复合材料与EPOXY的反应改善了它们的拉伸性能、韧性、热稳定性和耐水性。