Graphene-based nano-functional materials for surface modification of wheat straw to enhance the performance of bio-based polylactic acid composites
Graphene-based nano-functional materials for surface modification of wheat straw to enhance the performance of bio-based polylactic acid composites
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DOI：
10.1016/j.mtsust.2022.100308
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发表时间：
2023-01-20
影响因子：
7.8
通讯作者：
Al-Kheetan, M. J.
中科院分区：
文献类型：
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作者：
Chougan, M.;Ghaffar, S. H.;Al-Kheetan, M. J.
为了增强麦杆与聚乳酸（PLA）基质的相容性，使用了几种石墨烯基材料（GBM）衍生物，包括石墨烯纳米片、氧化石墨烯和具有0.1重量%的恒定分数的纳米石墨颗粒，用于小麦秸秆的表面功能化。通过比较具有和不具有GBM表面功能化的PLA生物基复合材料的机械和热性能来评估麦秸表面质量。所有得到的复合材料与表面功能化秸秆颗粒表现出更高的热稳定性，弯曲强度，拉伸强度和拉伸韧性比那些与原始秸秆。这可能与改进的秸秆/聚乳酸基质界面结合诱导的存在下，通过形态学评估证实的秸秆颗粒的表面上的GBM。机械性能研究显示，与对照样品相比，由氧化石墨烯功能化秸秆颗粒组成的生物基复合材料的弯曲强度、拉伸强度和拉伸韧性分别最大提高了27%、66%和322%。Crown Copyright（c）2022由Elsevier Ltd.发布。（网址：http：//creativecommons.org/licenses/by/4.0/）。
To enhance wheat straw compatibility with the polylactic acid (PLA) matrix, several graphene-based materials (GBMs) derivatives, including graphene nanoplatelets, graphene oxide, and nano graphite particles with a constant fraction of 0.1 wt.-%, were employed for the surface functionalisation of wheat straw. Wheat straw surface quality was assessed by comparing PLA bio-based composites' mechanical and thermal performance with and without GBM surface functionalisation. All the resulting composites with surface functionalised straw particles exhibited higher thermal stability, flexural strength, tensile strength, and tensile toughness than those with pristine straw. This could be associated with the improved straw/PLA matrix interfacial bonding induced by the existence of GBMs on the surface of straw particles which was confirmed through morphology assessments. The mechanical properties in-vestigations revealed maximum enhancements of 27%, 66%, and 322% for flexural strength, tensile strength, and tensile toughness, respectively, for bio-based composites consisting of graphene oxide-functionalised straw particles compared to control samples.Crown Copyright (c) 2022 Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).