双金属离子交联海藻酸盐复合相变纤维的制备与性能  

Preparation and characterization of phase change fibers of bimetal ion crosslinked alginate composites

作　　者：狄纯秋 郭静 管福成 相玉龙 单继成 DI Chunqiu;GUO Jing;GUAN Fucheng;XIANG Yulong;SHAN Jicheng(School of Textile and Material Engineering,Dalian Polytechnic University,Dalian,Liaoning 116034,China;Functional Fiber and Its Composite Materials Engineering Technology Research Center of Liaoning Province,Dalian,Liaoning 116034,China)

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034 [2]辽宁省功能纤维及复合材料工程技术中心,辽宁大连116034

出　　处：《纺织学报》2023年第5期54-62,共9页Journal of Textile Research

基　　金：国家自然科学基金项目(51773024,51373027);辽宁省科技创新团队项目(LT2017017)。

摘　　要：为制备多功能性海藻酸盐复合纤维,以海藻酸钠(SA)和丝素蛋白(SF)、月桂酸-棕榈酸二元低共熔混合物(LA-PA)为原料,通过湿法纺丝技术制备Zn^(2+)-Ca^(2+)、Cu^(2+)-Ca^(2+)、Sr^(2+)-Ca^(2+)双金属离子交联海藻酸盐复合相变纤维。利用红外光谱和高斯拟合研究了复合相变纤维的氢键作用,考察了双金属离子交联体系对复合相变纤维结构和性能的影响。结果表明:相对于单一Ca^(2+)交联体系,双金属离子交联体系分子内氢键含量增加,分子间氢键含量减少,纤维的断裂强度随β-折叠链结构含量增加而提高;Zn^(2+)-Ca^(2+)、Cu^(2+)-Ca^(2+)复合相变纤维具有优异的抗菌性能;纤维的最大结晶温度和熔融温度分别为26.19和36.71℃,最大相变焓为25.95 J/g,且经50次热循环后相变温度和相变焓差异较小,具有良好的蓄热稳定性。Objective In order to prepare multifunctional alginate composite fibers,Zn ^(2+)-Ca ^(2+),Cu ^(2+)-Ca ^(2+),Sr ^(2+)-Ca ^(2+)bimetal ion crosslinked alginate composite phase change fibers were prepared from sodium alginate(SA),silk fibroin(SF),lauric acid palmitic acid binary eutectic mixture(LA-PA)by wet spinning technology.Method The influence of bimetal ion crosslinking system on hydrogen bonding of composite phase change fibers was studied by infrared spectroscopy and Gaussian fitting,and the influences of different bimetal ion crosslinking systems on the structure,mechanical properties,thermal stability,thermal properties,water resistance and bacteriostasis of composite phase change fibers were investigated by scanning electron microscope,thermogravimetric analysis,differential scanning calorimetry.Results The type of double ions was found to have a great influence on the molecular action.In comparison to the single Ca ^(2+)ion crosslinking system,the content increase of intramolecular hydrogen bonds in the bimetal ion crosslinking system resulted in content decrease of intermolecular hydrogen bonds,while the content of free hydroxyl groups hardly changed(Fig.2 and Tab.1).In fibersβ-the content of folded chains is an important factor affecting the mechanical properties of fibers,and the breaking strength of fibers varies withβ-the content of the folded chain structure increases as it increases(Tab.2,Tab.4).Owing to the wet spinning forming mechanism,there are grooves along the fiber axis on the fiber surface.The Zn ^(2+)-Ca ^(2+),Sr ^(2+)-Ca ^(2+),Cu ^(2+)-Ca ^(2+)crosslinked composite phase change fiber showed denser grooves than the single Ca ^(2+)crosslinked composite fiber.Metal ions participated in the forming process of the composite phase change fiber(Fig.3 and Tab.2).The thermal stability of Cu ^(2+)-Ca ^(2+)ion crosslinked composite phase change fiber was found lower than that of the other three composite phase change fibers(Fig.4).The maximum crystallization temperature and melting temperatures o

关 键 词：月桂酸-棕榈酸二元低共熔物 海藻酸钠 丝素蛋白 湿法纺丝 复合相变纤维 蓄热材料 

分 类 号：O636.1[理学—高分子化学] TB34[理学—化学]