霉菌对苎麻和竹原纤维结构与性能的影响

Effect of Mold on Flax and Bamboo Fibre in Structure and Property

为了研究霉菌对苎麻和竹原纤维微观结构和力学性能的影响,以其织物为试样,采取豆渣包埋法进行降解试验,分析与比较了被降解试样的微观结构特征和力学性能。结果表明:2周后,苎麻和竹原纤维的表面都变粗糙,前者的强力和伸长都减小,而后者则相反;3周后,两种纤维的表面都产生了微小坑穴;4周后,两种纤维表面的坑穴明显增多,并出现了裂纹,同时力学性能明显下降,断裂强力下降率分别为40%和20%以上。红外光谱和X射线衍射的试验结果表明:两种纤维素纤维在霉菌的作用下,经过4周后,晶胞结构仍为纤维素Ⅰ型,前3周结晶度的变化不明显,4周后,结晶度明显下降。

To study effect of mold on flax and bamboo fibre in microstructure and mechanical property, its fabric were took as example and degradation tests were carried out through embedding in bean dregs, microstructural character and mechanical property of tested sample were analysed and contrasted. The result shows that two weeks later surfaces of flax and bamboo fibre are becoming coarse, strength and elongation of flax are reducing while the bamboo＇s are the opposite. Three weeks later micro-delves and flaws appears in the surfaces of the two fibre. Four weeks later the flaws are increasing obviously, crack appears and mechanical properties decline, decreasing rates of breaking strength are above 40% and 20% respectively. The result tested by infrared spectrum and X-ray shows that the two fibre treated by mold after four weeks crystal cell structure is still cellulose Ⅰ-type, crystallinity changes slightly in three weeks, four weeks later crystallinity reduced obviously.