Mechanical properties of cellulose nanofiber (CNF) reinforced polylactic acid (PLA) prepared by twin screw extrusion
Mechanical properties of cellulose nanofiber (CNF) reinforced polylactic acid (PLA) prepared by twin screw extrusion
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DOI：
10.1016/j.compscitech.2010.07.005
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发表时间：
2010-10-31
影响因子：
9.1
通讯作者：
Oksman, Kristiina
中科院分区：
文献类型：
--
作者：
Jonoobi, Mehdi;Harun, Jalaluddin;Oksman, Kristiina
采用双螺杆挤出法制备纤维素纤维增强聚乳酸。通过将母料与高浓度的CNF在PIA中预混合并稀释至最终浓度（1、3、5重量%）来制备纳米复合材料。在挤压过程中。从理论和实验上研究了复合材料的形态、力学性能和动态力学性能（DMA），以了解不同CNF浓度对复合材料性能的影响。当纳米复合材料中加入5%（质量分数）纳米复合材料时，拉伸模量和强度分别从2.9GPa增加到3.6GPa和从58 MPa增加到71 MPa CNF。DMA结果也是积极的;与PLA相比，所有纳米复合材料的储能模量增加;在高温区域（70 ° C）更显著。纳米纤维的加入使tan δ峰向更高的温度移动。对于具有5 wt.%PIA的复合材料，PIA的tan δ峰从70 ° C移动到76 ° C。CNF。(c)2010爱思唯尔有限公司版权所有。
The aim of this study was to develop cellulose nanofiber (CNF) reinforced polylactic acid (PLA) by twin screw extrusion. Nanocomposites were prepared by premixing a master batch with high concentration of CNFs in PIA and diluting to final concentrations (1, 3, 5 wt.%) during the extrusion. Morphology, mechanical and dynamic mechanical properties (DMA) were studied theoretically and experimentally to see how different CNF concentrations affected the composites' properties. The tensile modulus and strength increased from 2.9 GPa to 3.6 GPa and from 58 MPa to 71 MPa, respectively, for nanocomposites with 5 wt.% CNF. The DMA results were also positive; the storage modulus increased for all nanocomposites compared to PLA; being more significant in the high temperature region (70 degrees C). The addition of nanofibers shifted the tan delta peak towards higher temperatures. The tan delta peak of the PIA shifted from 70 degrees C to 76 degrees C for composites with 5 wt.% CNF. (c) 2010 Elsevier Ltd. All rights reserved.