Chen Changjie, Yin Weiwei, Chen Guicui, Sun Guangxiang, Wang Guohe
College of Textile and Clothing Engineering, Soochow University, Suzhou 215006, China.
Nantong Textile & Silk Industrial Technology Research Institute, Nantong 226108, China.
Materials (Basel). 2017 May 9;10(5):514. doi: 10.3390/ma10050514.
In this work, windmill palm fiber (WPF), alkali-treated fiber (AF) without hemicellulose and bleached fiber (BF) without lignin were prepared and buried in soil for 30, 60 and 90 days. The surface morphology, chemical composition, crystallinity degree, mechanical properties, and residual mass rate of the samples, before and after biodegradation, were investigated. According to the results, soil burial degradation can remove the parenchyma cells and silica-bodies of WPF and deplete droplets containing the lignin of alkali-treated fiber after it has been buried for 30 days (AF30), and degradation of the single fiber cell wall of bleached fiber after it has been buried for 30 days (BF30). Buried in natural soil, lignin has a slower degradation rate than that of hemicellulose. WPF showed no significant differences in tensile strength after burial in soil for 90 days, because of the integrity fiber structure decreased the biodegradation. The most serious decrease, about 43%, in tensile strength occurred in AF after it had been buried for 90 days (BF90). This basic knowledge may be helpful for windmill palm fiber applications, especially for biodegradable composites.
在这项工作中，制备了风车棕榈纤维（WPF）、去除半纤维素的碱处理纤维（AF）和去除木质素的漂白纤维（BF），并将其埋入土壤中30天、60天和90天。研究了样品在生物降解前后的表面形态、化学成分、结晶度、力学性能和残余质量率。结果表明，土壤掩埋降解可去除WPF的薄壁细胞和硅质体，碱处理纤维（AF30）在掩埋30天后可消耗含木质素的液滴，漂白纤维（BF30）在掩埋30天后可降解单纤维细胞壁。埋于天然土壤中，木质素的降解速率比半纤维素慢。WPF在土壤中掩埋90天后拉伸强度无显著差异，因为完整的纤维结构降低了生物降解性。AF在掩埋90天（BF90）后拉伸强度下降最为严重，约为43%。这些基础知识可能有助于风车棕榈纤维的应用，特别是对于可生物降解复合材料。
