短玄武岩纤维对聚乳酸复合材料耐久性、力学性能和热性能的影响

Q2 Materials Science

Polymers from Renewable Resources Pub Date : 2019-08-07 DOI:10.1177/2041247919863631

Lu Han, Fangwu Ma, Shixian Chen, Yongfeng Pu

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引用次数: 11

摘要

研究了玄武岩纤维（BF）含量对BF增强聚乳酸（PLA）复合材料性能的影响。制备了具有10wt%、20wt%、30wt%、40wt%、50wt%和60wt%BF的复合材料。结果表明：（1）随着BF含量的增加，力学性能得到改善。复合材料的最大拉伸强度和模量（即分别为140和5050MPa）发生在BF含量为50%时。最大弯曲强度，即159.5MPa，是纯PLA的两倍，并且在BF含量为40%时获得。然而，当BF含量大于50%时，力学性能恶化。（2）动态力学分析和差示扫描量热法测量表明，BF可以阻止储能模量的损失，并有效地提高结晶度。BF的加入使结晶度由34.6%提高到54.6%。（3）在加速老化试验后，纯PLA太弱，无法进行试验。然而，BF增强的PLA保持了高的拉伸模量值（即未老化样品的60%）。这可能是由于PLA复合材料的高结晶度。因此，适量的BF作为增强材料可以提高PLA复合材料的性能。

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Effect of short basalt fibers on durability, mechanical properties, and thermal properties of polylactic acid composites

The effect of basalt fiber (BF) content on the properties of BF-reinforced polylactic acid (PLA) composites was investigated. Composites with 10, 20, 30, 40, 50, and 60 wt% BF were fabricated. The results revealed that (1) the mechanical properties improved with increasing BF content. The maximum tensile strength and modulus of the composites (i.e. 140 and 5050 MPa, respectively) occurred at a BF content of 50%. The maximum flexural strength, that is, 159.5 MPa was two times larger than that of the pure PLA and was obtained at a BF content of 40%. However, the mechanical properties deteriorated at BF contents >50%. (2) BF can stop storage modulus loss and are effective in improving the crystallinity, as revealed by dynamic mechanical analysis and differential scanning calorimetry measurements. The crystallinity improved from 34.6% to 54.6% with BF addition. (3) After the accelerated aging test, pure PLA was too weak for testing. However, high values of the tensile modulus (i.e. 60% that of the nonaged samples) were maintained by the BF-reinforced PLA. This resulted possibly from the high crystallinity of the PLA composites. Therefore, suitable amounts of BF as reinforcements can yield improvements in the performance of PLA composites.

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来源期刊

Polymers from Renewable Resources Materials Science-Polymers and Plastics

CiteScore

3.50

自引率

0.00%

发文量

期刊介绍： Polymers from Renewable Resources, launched in 2010, publishes leading peer reviewed research that is focused on the development of renewable polymers and their application in the production of industrial, consumer, and medical products. The progressive decline of fossil resources, together with the ongoing increases in oil prices, has initiated an increase in the search for alternatives based on renewable resources for the production of energy. The prevalence of petroleum and carbon based chemistry for the production of organic chemical goods has generated a variety of initiatives aimed at replacing fossil sources with renewable counterparts. In particular, major efforts are being conducted in polymer science and technology to prepare macromolecular materials based on renewable resources. Also gaining momentum is the utilisation of vegetable biomass either by the separation of its components and their development or after suitable chemical modification. This journal is a valuable addition to academic, research and industrial libraries, research institutions dealing with the use of natural resources and materials science and industrial laboratories concerned with polymer science.