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Influence of alkaline treatment on sisal fibre applied as reinforcement agent in composites of corn starch and cellulose acetate matrices
Plastics, Rubber and Composites ( IF 2 ) Pub Date : 2020-09-05 , DOI: 10.1080/14658011.2020.1816119
Roberta Ranielle Matos de Freitas 1 , Karina Palmizani do Carmo 1 , Jéssica de Souza Rodrigues 2 , Vitor Hugo de Lima 2 , Joelen Osmari da Silva 2 , Vagner Roberto Botaro 1, 2
Affiliation  

ABSTRACT This study show influence of alkaline treatment on sisal fiber (SF) in different composites of starch matrices (SM) and cellulose acetate matrices (CAM). SF were modified with an aqueous 0.5M NaOH solution. Composites were prepared in proportion of 3% fiber/matrix (m/m) using casting method. The samples were characterized by Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy by Attenuated Total Reflection (FTIR-ATR), Thermogravimetric Analysis (TGA) and Dynamic-mechanical thermal analysis (DMA). Through results obtained in FTIR and TGA, it was possible to verify that alkaline treatment partially removed hemicellulose and SF lignin. With SEM, best fiber/matrix adhesion in composites prepared with modified fiber (TSF) has been proven to change fibre morphology. Through DMA analysis it was possible to observe that after addition of SF and TSF, SM composites showed improvements in mechanical properties, while TGA showed an increase in initial temperature of thermal degradation in CAM composites with addition of fiber.

中文翻译:

碱处理对玉米淀粉和醋酸纤维素复合材料中作为增强剂的剑麻纤维的影响

摘要 本研究显示了碱处理对不同淀粉基质 (SM) 和醋酸纤维素基质 (CAM) 复合材料中剑麻纤维 (SF) 的影响。SF 用 0.5M NaOH 水溶液改性。采用浇铸法按3%纤维/基质(m/m)的比例制备复合材料。通过扫描电子显微镜 (SEM)、衰减全反射傅里叶变换红外光谱 (FTIR-ATR)、热重分析 (TGA) 和动态机械热分析 (DMA) 对样品进行表征。通过 FTIR 和 TGA 获得的结果,可以验证碱处理部分去除了半纤维素和 SF 木质素。使用 SEM,已证明用改性纤维 (TSF) 制备的复合材料中的最佳纤维/基质粘附力可以改变纤维形态。
更新日期:2020-09-05
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