摘要
为提高大麻纤维溶解性能，对大麻纤维进行氢氧化钠预处理和氯化锂/N,N-二甲基乙酰胺（LiCl/DMAc）溶解处理。用质量分数为18%的氢氧化钠在60℃处理大麻纤维1～4h，然后将预处理后的大麻纤维在不同温度（70、80、95℃）下溶解于质量分数为10％的LiCl/DMAc溶解体系。用扫描电镜、红外光谱仪 和 X 射线衍射仪对溶解前后的大麻纤维进行表征，测试溶解后溶液黏度值。结果表明：氢氧化钠预处理后纤维素的晶型由纤维素Ⅰ转变为纤维素Ⅱ；溶解温度升高，大麻纤维溶解性增强，95℃条件下，预处理2h和3h的大麻纤维在10%LiCl/DMAc溶解体系中能够完全溶解，溶解质量分别为1.0～1.2g和1.2～1.5g；预处理3h的大麻纤维/LiCl/DMAc溶液黏度值更大，溶液稳定。
In order to improve the solubility of hemp fibers, samples were subjected to alkali pretreatment and lithium chloride /N, N- Dimethylacetamide （LiCl/DMAc） solution treatment. Native hemp fibers were immersed in 18% alkali liquor and 60℃ bath temperature for 1 -4 h. After pretreatment, hemp fibers were dissolved in 10% LiCl/DMAc solvent system at different temperatures （70 ℃, 80 ℃ and 95 ℃）.The changes of the surface morphology, crystallization structure and solubility of hemp fibers were indicated by scanning electron microscope, Fourier transform infrared spectroscopy, X-ray diffraction and solubility test. The results show that with the alkali treatment crystal form of cellulose I turned into cellulose II . Solubility of hemp fibers increased when LiCl/DMAc treatment temperature were raised from 70℃ to 95℃. After alkaline activation, hemp fibers could be dissolved1.0-1.2g for 2h and 1.2-1.5g for 3h in 10% LiCl/DMAc soluble system. The viscosity value of the hemp/LiCl/DMAc with hemp fiber pretreated by NaOH for 3 h is greater for 3 h NaOH preteratment hemp fibers in. The solution of hemp/LiCl/DMAc is stable.
作者
钟智丽
朱敏
张宏杰
翁琦
ZHONG Zhili ZHU Min ZHANG Hongjie WENG Qi(School of Textiles, Tianjin Polytechnic University, Tianjin 300387, Chin)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2016年第11期92-97,共6页
Journal of Textile Research
