苎麻纤维增强原位阴离子聚合尼龙6复合材料的制备及性能研究

doi:10.11896/j.issn.1005-023X.2018.02.011

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Abstract

In this paper, textile-ramie fiber (RF) reinforced anionic polyamide-6 (APA6) composites were prepared successfully with the heat treated ramie fiber and caprolactam as monomer.The effects of the heat-treatment on the functional groups, the crystallization, the mechanical properties and the fracture morphology of the ramie fiber were studied. Meanwhile, the mechanical properties, thermal stability, as well as interfacial properties of the RF/APA6 composites were also investigated. The results showed that the hydroxyl groups covering on the ramie fiber surface decreased significantly, the crystallinity, the tensile strength and modulus decreased after the 280 ℃ heat-treatment, but no obvious changes in the morphology of the ramie fiber. The interfacial adhesion between the resin and the ramie fiber of the RF/APA6 composites was excellent. Compared with the neat APA6, the tensile strength of the composites increased slightly, while the tensile modulus, flexural property and the thermal stability were increased significantly.

Key words： ramie fiber heat treatment in-situ anionic polymerization polyamide-6 composites

Published: 25 January 2018

CLC number:

TQ327.9

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	Articles by authors
	Guangzhi LIU
	Wei LI
	Youqing FEI

Cite this article:

Guangzhi LIU,Wei LI,Youqing FEI. Study on the Preparation and Properties of Textile-ramie Fiber Reinforced In-situ Anionic Polyamide-6 Composites[J]. Materials Reports, 2018, 32(2): 213-218.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.02.011 OR http://www.mater-rep.com/EN/Y2018/V32/I2/213

The evolution of the anionic polymerization results of RF-reinforced APA6 composites differing in heat-treatment temperature of ramie fiber

The diagrammatic sketch of the sample card

The tensile fracture morphology of ramie fibers: (a)untreated; (b)160 ℃ heat-treated; (c)280 ℃ heat-treated; (d)the processing diagram of Photoshop

FTIR spectra of ramie fibers: (a)untreated; (b)160 ℃ heat-treated; (c)280 ℃ heat-treated

Mechanism of intramolecular dehydration process of cellulose

XRD diffractograms for the ramie fiber:(a)untreated; (b)160 ℃ heat-treated;(c)280 ℃ heat-treated

The mechanical properties of the single ramie fiber after heat treatment at different temperatures

The tensile stress-strain curves of ramie fibers: (a)untreated; (b)160 ℃ heat-treated; (c)280 ℃ heat-treated

SEM micrographs of (a) untreated ramie fibers, (b) 280 ℃ heat-treated ramie fibers; (c,d) fractured surface morphology of ramie-fiber-reinforced APA6 composites with 280 ℃ heat-treated ramie fibers

The mechanical properties of the neat APA6 and RF/APA6 composites

Temperatures corresponding to the weight losses of 1%,5%,10% and 50% during thermogravimetry test of the neat APA6 and RF/APA6 composites

Thermogravimetric curves of the neat APA6 and RF/APA6 composites

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