Poly(l-lactide)/poly(d-lactide)/bamboo fiber (BF) bio-composites with enhanced heat resistance, mechanical and rheological performance

IF 2.2 4区工程技术 Q1 MATERIALS SCIENCE, TEXTILES

Fibers and Polymers Pub Date : 2024-10-26 DOI:10.1007/s12221-024-00753-8

Yi Li, Haopeng Wang, Hongda Cheng, Ye Zhang, Huan Wang, Changyu Han

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引用次数: 0

Abstract

Natural-fiber-reinforced poly(lactic acid) (PLA) is a simple and effective method to improve properties with retaining the fully biodegradability and eco-friendliness. Herein, we prepared the poly(l-lactic acid) (PLLA)/poly(d-lactic acid) (PDLA)/bamboo fiber (BF) bio-composites through melt compounding. The stereocomplex PLA (SC-PLA) was formed during the melt blending. The SC-PLA crystals combined with BFs in the PLLA/PDLA/BF bio-composites had synergistic effects that could enhance crystallization rate, rheological and mechanical properties, and heat resistance. The results showed that the SC-PLA crystals drastically increased the nucleation density and accelerated the crystallization process of the bio-composites. The rheological properties of the bio-composites were obviously enhanced by the incorporation of BFs and PDLA. Mechanical properties of the bio-composites were increased compared to neat PLLA. The bio-composite with 10 wt% PDLA showed tensile strength of 72.4 MPa, and Young’s modulus of 2855 MPa, which were 9.4% and 18% higher than those of neat PLLA, respectively. Moreover, Vicat softening temperature (VST) of the bio-composites was about 90 °C higher than that of neat PLLA. Overall, this work provides an interesting strategy of fabrication of the BFs reinforced PLA composites with controllable properties.

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耐热性、机械和流变性能更强的聚(l-内酰胺)/聚(d-内酰胺)/竹纤维(BF)生物复合材料

天然纤维增强聚乳酸（PLA）是一种简单有效的方法，可在保持完全生物降解性和生态友好性的前提下改善性能。在此，我们通过熔融共混制备了聚乳酸（PLA）/聚（d-乳酸）/竹纤维（BF）生物复合材料。在熔融混合过程中形成了立体复合聚乳酸（SC-PLA）。在 PLLA/PDLA/BF 生物复合材料中，SC-PLA 结晶与 BF 结合具有协同效应，可提高结晶速度、流变和机械性能以及耐热性。结果表明，SC-PLA 晶体大大提高了成核密度，加速了生物复合材料的结晶过程。BFs 和 PDLA 的加入明显提高了生物复合材料的流变性能。与纯聚乳酸相比，生物复合材料的机械性能有所提高。含 10 wt% PDLA 的生物复合材料的拉伸强度为 72.4 MPa，杨氏模量为 2855 MPa，分别比纯 PLLA 高 9.4% 和 18%。此外，生物复合材料的维卡软化温度（VST）比纯聚乳酸高约 90 °C。总之，这项工作为制备性能可控的生物纤维增强聚乳酸复合材料提供了一种有趣的策略。

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来源期刊

Fibers and Polymers 工程技术-材料科学：纺织

CiteScore

3.90

自引率

8.00%

发文量

267

审稿时长

3.9 months

期刊介绍： -Chemistry of Fiber Materials, Polymer Reactions and Synthesis- Physical Properties of Fibers, Polymer Blends and Composites- Fiber Spinning and Textile Processing, Polymer Physics, Morphology- Colorants and Dyeing, Polymer Analysis and Characterization- Chemical Aftertreatment of Textiles, Polymer Processing and Rheology- Textile and Apparel Science, Functional Polymers