优化纤维素喜马拉雅荨麻纤维的堿处理，以增强聚合物复合材料。
Optimizing the alkali treatment of cellulosic Himalayan nettle fibre for reinforcement in polymer composites.
机构信息
Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247667, Uttarakhand, India; Department of Chemical Engineering, University of Petroleum and Energy Studies, Dehradun 248007, Uttarakhand, India.
Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247667, Uttarakhand, India.
出版信息
Carbohydr Polym. 2022 Nov 15;296:119937. doi: 10.1016/j.carbpol.2022.119937. Epub 2022 Aug 3.
The Himalayan nettle plant can yield strong and long bast fibre. In this study, the extracted fibres were treated with 3, 5, 7, and 10 wt% alkali solution and characterised the raw and treated fibres for chemical, morphological, physical, mechanical, and thermal properties. The objective is to find the optimized alkali concentration for fibre surface treatment to use as reinforcement in polymer composites. Results revealed that alkali treatment removed waxes, lignin, and hemicellulose from the surface and enhanced the fibre properties to make it compatible with the polymer matrix. However, alkali concentration affected the fibre properties significantly. 5 % alkali treatment resulted in a maximum crystallinity index (79.1 %), average roughness (26.8 nm), tensile strength (296.97 MPa), activation energy (181.33/180.97 kJ/mol) and initial temperature for stage II degradation (311.2 °C). This investigation concludes that 5 % is the optimized alkali concentration for surface treatment of the nettle fibre.
喜马拉雅荨麻植物可产生强韧而长的韧皮纤维。在这项研究中，提取的纤维用 3%、5%、7%和 10%的碱溶液进行处理，并对原纤维和处理后的纤维进行化学、形态、物理、机械和热性能的表征。目的是找到优化的碱处理浓度，以纤维表面处理，作为聚合物复合材料的增强材料。结果表明，碱处理从表面去除了蜡质、木质素和半纤维素，提高了纤维性能，使其与聚合物基体相兼容。然而，碱浓度对纤维性能有显著影响。5%的碱处理导致结晶度指数（79.1%）、平均粗糙度（26.8nm）、拉伸强度（296.97MPa）、活化能（181.33/180.97kJ/mol）和第二阶段降解的起始温度（311.2°C）达到最大值。这项研究得出结论，5%是荨麻纤维表面处理的最佳碱浓度。
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