Centre for Advanced Materials and Renewable Resources, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi Selangor, Malaysia.
Carbohydr Polym. 2019 Jun 1;213:50-58. doi: 10.1016/j.carbpol.2019.02.074. Epub 2019 Feb 21.
In this study, modified agave cellulose fibre combined by graft copolymerisation with methylmethacrylate was tested as a potential reinforcement for polylactic acid (PLA)-natural rubber/liquid natural rubber blends. Mechanical, morphological, thermal, wetting, and biodegradation characterisations were performed to assess the influence of cellulose-graft-polymethylmethacrylate (cell-g-PMMA) content on the properties of biocomposites. The addition of cell-g-PMMA improved the mechanical properties of the composites because of the chemical interaction between PLA and PMMA. Thermal stability decreased slightly upon cell-g-PMMA addition because of the low thermal stability of PMMA. A soil burial test revealed that the degradation of composites decreased with an increase in the cell-g-PMMA content. However, the weight loss after burial, which directly affected the water absorption capacity, was still higher for the cell-g-PMMA composites than for the polymer alone.
在这项研究中，通过接枝共聚甲基丙烯酸甲酯对改性龙舌兰纤维素纤维进行了测试，作为聚乳酸（PLA）-天然橡胶/液体天然橡胶共混物的潜在增强剂。对机械性能、形态、热性能、润湿性能和生物降解性能进行了测试，以评估纤维素接枝聚甲基丙烯酸甲酯（cell-g-PMMA）含量对生物复合材料性能的影响。由于 PLA 和 PMMA 之间的化学相互作用，添加 cell-g-PMMA 提高了复合材料的机械性能。由于 PMMA 的热稳定性较低，添加 cell-g-PMMA 后热稳定性略有下降。土壤掩埋试验表明，随着 cell-g-PMMA 含量的增加，复合材料的降解减少。然而，掩埋后的重量损失（直接影响吸水率）对于 cell-g-PMMA 复合材料仍然高于聚合物本身。
