乳酸接枝竹纤维/聚乳酸复合材料的制备与性能表征

doi:10.11896/cldb.19100079

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Abstract Lactic acid grafted bamboo fiber/polylactic acid (LA-g-BF/PLA) composites were prepared by using lactic acid grafted bamboo fiber and polylactic acid as raw materials, glycerol, citrate and formamide at a mass ratio of 2∶3∶1 as plasticizers. The effects of residual lactic acid, proportion of lactic acid grafted bamboo fiber/polylactic acid, amount of plasticizer, hot pressing temperature and time on mechanical properties and water resistance of the composites were discussed. The composites were characterized by X-ray diffraction (XRD), differential scanning ca-lorimeter (DSC) and thermogravimetric analyzer (TGA). The results showed that the comprehensive performance of LA-g-BF/PLA composite was the best when the mass ratio of lactic acid grafted bamboo fiber to polylactic acid was 3∶7, the amount of plasticizer was 10%, the hot pressing temperature was 170 ℃ and the hot pressing time was 6 min. With the mass ratio of lactic acid grafted bamboo fiber and polylactic acid, the cold crystallization temperature and enthalpy of the composites decreased gradually, and the crystallinity increased gradually. It was indicated that the interdependence between lactic acid-grafted bamboo fiber and polylactic acid became worse. Especially, when the mass ratio of lactic acid grafted bamboo fiber and polylactic acid exceeds 3∶7, the interfacial compatibility of the composites rapidly deteriorates, which leads to the decrease of heat resistance of LA-g-BF/PLA composites.

Key words： lactic acid grafted bamboo fiber polylactic acid composite process optimization interface compatibility crystalline structure heat resistance

Published: 06 November 2020

CLC number:

TB332

Fund:China Postdoctoral Science Foundation Special Grant Project (2017T100615), National Natural Science Foundation of China (31600460), National Research Learning and Innovation Experimental Program for College Students (201810538006), Hunan Provincial Technical Innovation Platform and Talent Program in Science and Technology, PR China (2019RS2040), Key Scientific Research Project of Education Department of Hunan Province (18A157).

About author:: Kang Chenreceived his bachelor’s degree in engineering from Central South University of Forestry and Technology in 2019. His research interest is modification of biomass composites.
Yingfeng Zuoreceived his Ph.D. degree in enginee-ring from Northeast Forestry University in 2014. He is currently an associate professor in Central South University of Forestry and Technology. His research interests are modification of biomass composites and adhesives.

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	CHEN Kang
	HE Xiaoyu
	LI Wenhao
	WU Yiqiang
	LI Xingong
	ZUO Yingfeng

Cite this article:

CHEN Kang,HE Xiaoyu,LI Wenhao, et al. Preparation and Characterization of Lactic Acid Grafted Bamboo Fiber/Polylactic Acid Composites[J]. Materials Reports, 2020, 34(20): 20171-20176.

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http://www.mater-rep.com/EN/10.11896/cldb.19100079 OR http://www.mater-rep.com/EN/Y2020/V34/I20/20171

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