新型纤维素甲酸酯丝线的制备及其性能研究

Preparation and Properties of Novel Cellulose Formate Threads

关键词:  纤维素甲酸酯  丝线  强度  取代度  水稳定性

Key Words:cellulose formate  thread  tensile strength  degree of substitution  water resistance

摘要:本研究利用纤维素与甲酸反应制备纤维素甲酸酯(Cellulose formate,CF),并利用CF的甲酸溶液通过湿法纺丝制得了新型CF丝线。当纤维素甲酸酯化的温度为50 ℃,反应时间为5 h时,可以获得高强度CF丝线。具体的,CF甲酸溶液分别通过1% NaOH和5% ZnSO4两段凝固浴后水洗干燥得到了形态均匀,具备高强度(拉伸强度为151 MPa)、良好热稳定性和水稳定性的CF丝线。CF丝线良好的水稳定性使其在智能纺织、生物医学材料等领域具备应用潜力。

Abstract:In this study, cellulose formate (CF) was prepared by the reaction of cellulose with formic acid, and a novel CF thread was produced by wet spinning using the formic acid solution of CF. When the temperature for the formate esterification of cellulose is 50 °C and the reaction time is 5 hours high-strength CF threads can be obtained. Specifically, the formic acid solution of CF was passed through two-stage coagulation baths of 1% NaOH and 5% ZnSO?, respectively, followed by washing and drying, obtaining the CF threads with uniform morphology, high strength (tensile strength of 151 MPa), excellent thermal stability and water stability. Particularly, the good water stability of the CF threads could broaden their application scope, making them highly promising for applications in smart textiles and biomedical materials.