Characterization of alkali-treated jute fibers for physical and mechanical properties
Characterization of alkali-treated jute fibers for physical and mechanical properties
复制标题
DOI：
10.1002/app.1184
复制
发表时间：
2001-05-16
影响因子：
3
通讯作者：
Sarkar, BK
中科院分区：
文献类型：
--
作者：
Ray, D;Sarkar, BK
用 5% 浓度的 NaOH 溶液处理 0、2、4、6 和 8 小时时黄麻纤维发生的变化通过重量损失、线密度、韧度、模量、FTIR 和 X 射线测量来表征。处理 2 小时期间，体重减轻了 9.63%，半纤维素含量从 22% 下降至 12.90%。直到处理 2 小时，线密度值才显示出变化，处理 6 小时后，从 33.0 丹尼尔下降到 14.5 丹尼尔，下降了 56%。处理8小时后，纤维的韧性和模量分别提高了45%和79%，断裂应变百分比降低了23%。 X 射线衍射图显示，处理 6 小时后纤维的结晶度才增加，而 FTIR 测量显示，处理 2 小时后，随着 OH 基团数量的增加，大部分变化发生。通过测量模量、韧性和断裂应变百分比随处理时间的变化率，处理 4 小时时出现明显的转变，半纤维素溶解，导致重量损失和线密度下降，结晶度发展，转变时间后性能得到改善。 (C) 2001 约翰威利父子公司
Changes occurring in jute fibers when treated with a 5% concentration of a NaOH solution for 0, 2, 4, 6, and 8 h were characterized by weight loss, linear density, tenacity, modulus, FTIR, and X-ray measurements. A 9.63% weight loss was measured during 2 h of treatment with a drop of hemicellulose content from 22 to 12.90%. The linear density value showed no change until 2 h of treatment followed by a decrease from 33.0 to 14.5 denier by 56% after 6 h of treatment. The tenacity and modulus of the fibers improved by 45 and 79%, respectively, and the percent breaking strain was reduced by 23% after 8 h of treatment. X-ray diffractograms showed increase in crystallinity of the fibers only after 6 h of treatment, while FTIR measurements showed much of the changes occurring by 2 h of treatment with an increased amount of OH groups. By measuring the rate of change of the modulus, tenacity, and percent breaking strain with the time of treatment, a clear transition was apparent at 4 h of treatment with the dissolution of hemicellulose, causing a weight loss and drop in the linear density before and development of crystallinity with an improvement in the properties after the transition time. (C) 2001 John Wiley & Sons, Inc.