摘要
以鹿角菜为原料,在卡拉胶提取过程中将所得的提取液,不经沉淀干燥成粉末状态,直接作为纺丝液制备卡拉胶纤维,通过正交试验确定最佳制备提取液的工艺参数。结果表明,根据拉伸试验结果,Na OH的浓度、水浴温度、提取时间分别为8%、95℃和2 h为最佳制备提取液的条件。此条件下的提取液通过动态光散射和凝胶渗透色谱测试对其粒径和相对分子质量分布进行分析,结果表明提取液中的粒径分布均匀,平均直径为218 nm,提取液中卡拉胶的重均相对分子质量为1. 05×106,并且相对分子质量分布较窄,因此此提取液适合直接纺丝;另外,在最佳条件下制备的卡拉胶纤维的物理和化学性能通过扫描电子显微镜、傅里叶变换红外光谱、X射线衍射和能量色散谱仪进行表征,进而推测出卡拉胶纤维的成纤机理,为由鹿角菜提取液一步成纤提供了依据。
The extraction of Chondrus was used as spinning solution to prepare carrageenan fibers,without the steps of precipitation and drying during the extraction process. Orthogonal test was applied to determine the optimum extraction process. The results show that the optimum conditions are as follows: the concentration of NaOH,the temperature of water bath,the time of water bath are 8%,95 ℃ and 2 h,respectively. The particle size and molecular weight distribution of extraction under these conditions were analyzed by dynamic light scattering( DLS) and gel permeation chromatography( GPC). The results show that the particle size distribution of the extraction is uniform with an average diameter of218 nm. The average molecular weight of the carrageenan in the extraction is 1. 05 × 10^6,and the molecular weight distribution is narrow. Therefore the extraction is suitable for spinning directly. The physical and chemical properties of the carrageenan fibers prepared under the optimal conditions were characterized by SEM,FT-IR,XRD and energy dispersive spectroscopy( EDS). Through the above characterization methods,the formation mechanism of carrageenan fiber is deduced,which lay a theoretical foundation to form fiber from Chondrus extraction by one-step method.
作者
董敏
薛志欣
夏延致
Min Dong;Zhixin Xue;Yanzhi Xia(College of Chemical Engineering , Qingdao University , Qingdao 266071 , China;Institute of Marine Biobased Material,Qingdao University,Qingdao 266071 , China;State Key Laboratory of Biopolysaccharide Fibers and Ecological Textiles,Qingdao University , Qingdao 266071 , China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2019年第1期153-160,共8页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(50803030)
博士后基金(201104581
20100471495)
山东省泰山学者建设工程项目
长江学者和创新团队发展计划(IRT0970)
关键词
鹿角菜
提取液
卡拉胶纤维
Chondrus
extraction
carrageenan fiber
