海藻酸钠纺丝原液的原料分析  

Analysis on materials of sodium alginate spinning solutions

作　　者：朱剑[1,2] 林海[1,2] 但卫华[1,2] 曾睿[1,2] 贾淑平[1,2] 

机构地区：[1]四川大学轻纺与食品学院,四川成都610065 [2]四川大学制革清洁技术国家工程实验室,四川成都610065

出　　处：《纺织学报》2010年第2期1-6,共6页Journal of Textile Research

基　　金："十五"国家科技攻关项目(2004BA901A028)

摘　　要：选用2种海藻酸钠（SA）进行原料分析,以期对其纺丝提供指导。运用哈里斯外推法,通过测定计算得到2种SA的黏均分子量,分别为130 436~204 070 Da和541 636~569 846 Da 采用旋转黏度计,通过对SA溶液流变学内容的检测和推导计算表明,其流变性能符合宾汉流体的主要特征,存在＂剪切变稀＂的特点 对SA溶液冻干海绵进行了红外光谱分析,通过图谱计算2种不同SA长链分子中甘露糖醛酸（M）和古罗糖酸（G）残基的比例（M/G）分别为1.31（A）和1.86（B） 最后测定了SA成膜的力学性能,结果显示原料中M/G影响材料的力学性能,可能使SA材料表现出＂弱而脆＂或者＂强而脆＂的不同特性。Two sodium alginate（SA） was selected to analyze the materials for guiding the spinning.Employing the Ubbelohde viscometer,the viscosityaverage molecular weight of these two different sodium alginate（SA） were determined firstly,which was（130 436）～（204 070 Da） and（541 636）～（569 846 Da）.Besides,the solutions were determined or derived in the field of rheology through rotating cylinder viscometer,and the results show that there exists the characteristic of shear thinning,which is consistent with the primary character of Bingham liquid.Then the freeze-dried sponge of SA solutions were analyzed by infrared spectrum,and the proportion of R-D-mannuronate（M） and -L-guluronate（G） in the chains of SA were calculated through the spectrum,that′s 1.31（A） and 1.86（B）.Finally,the mechanical properties of SA films were figured,and the results show that the M/G ratio of the materials affected the mechanical properties of SA and probably make SA represent two different specialities of ″infirm and brickle″ or ″strong and brickle″.

关 键 词：海藻酸钠 分子量 流变性 力学性能 可纺性 

分 类 号：TS102.52[轻工技术与工程—纺织工程]