稻秸秆纤维的吸湿性能

为拓展稻秸秆纤维的应用，利用扫描电镜对稻秸秆纤维的表面形态进行表征，测试了稻秸秆纤维、亚麻纤维、棉纤维在标准大气条件下的吸放湿特性，绘出了3种纤维的吸放湿回归曲线，推导出吸湿和放湿速率回归方程，对比分析了3种纤维的吸湿性能的差异。实验结果表明：稻秸秆纤维纵向具有大量沟槽，比表面积很大；稻秸秆纤维具有良好的吸湿、放湿性能，稻秸秆纤维的吸湿回潮率为9.3%，放湿回潮率为10.35%；3种纤维的吸放湿速率呈指数曲线衰减，亚麻纤维的吸放湿速率最高，稻秸秆纤维的吸放湿速率居中，棉纤维的吸放湿速率最低。

Moisture adsorption property of rice-straw fiber

In order to study the moisture absorption and liberation properties of rice-straw fiber,the morphological structure of rice-straw fiber was characterized by scanning electron mircroscope,the absorption and liberation properties of rice-straw fiber,flax fiber and cotton fiber were tested in the standard normal atmospheric conditions.The moisture absorption and desorption properties of rice-straw fiber were tested.Their regression curves of moisture absorption and liberation were drawed,and based on it,the regression equations of moisture absorption and desorption velocity were derived.The hygroscopity of rice-straw fiber was analyzed and compared with flax fiber and cotton fiber. The results show that,the lengthwise of the rice-straw fiber has a large number of grooves and it’s specific surface area is large.The moisture absorption and liberation of rice-straw fiber are very good.The moisture absorption and liberation regain rate of rice-straw fiber are 9.3% and 10.35% respectively.The moisture absorption and liberation rate of three fibers decay with exponential curve.The moisture absorption and liberation rate of flax fiber is the quickest,rice-straw fiber in the second,and cotton fiber is the slowest.