pet沉析纤维的制备及成纸性能研究应用化学专业论文.docxVIP

行了光学显微镜观察、扫描电镜观察、比表面积测试、筛分级份分析、热重 行了光学显微镜观察、扫描电镜观察、比表面积测试、筛分级份分析、热重 分析、XRD分析。研究发现，PET沉析纤维与市售PET浆粕的形态差别较 大，市售PET浆粕的尺寸分布较PET沉析纤维略微均匀，热稳定性略高于 PET沉析纤维；PET沉析纤维的比表面积远大于市售PET浆粕，结晶度也 大于市售PET浆粕。 将市售打浆处理的PET浆粕和沉析法制备的PET沉析纤维分别与PET 短切纤维进行抄纸，比例为3：7、4：6、5：5、6：4、7：3，对比其成纸性能。结 果表明，在确定纤维与浆粕的最佳比例为5：5下，不同条件下制备的PET沉 析纤维均可以成纸。由PET沉析纤维抄造的纸张的抗张指数为34．ON·m·g～， 撕裂指数为27．5mN·m2·g～，耐破指数为5．1 9KPa．m2．g～，由市售PET浆粕抄 造的纸张的抗张指数为3 1．9N·m·g～，撅裂指数为1 8．0mN·m2·91，耐破指数为 4．3KPa．m2·g～，PET沉析纤维的成纸性能要好于市售PET浆粕纸。 关键词：PET沉析纤维，沉析法，比表面积，成纸性能，热性能 II 万方数据 PREI，ARATION PREI，ARATION OF PET FIBRID BY PRECIPITATION METHOD AND ITS PAPERMAKING PROPERTY ABSTRACT In recent years，with the overall development of social economy and industry, high-performance，functional，differential polyester(PET)fiber is becoming the important structure material and base material．Melt spinning and wet spinning as two commonly used methods of synthetic fiber molding technology both have the problemsof thatthe equipment is complex and the costis highly．Precipitation method as a branch of wet spinning,its application field is continuously developing and improving． Fibrid made with precipitation method which is that a certain concentration of polymer slurry injects in high speed shearing coagulant，droplets is gradually elongated under the action of high speed shear force，deformed，frizzed，fibrillated in the end．All the performance(surface topograph，size distribution，surface area,crystallinity,thermal property)of fibrid Can be regulated and optimized by precipitation process．Compared with traditional preparation process，precipitation process leaves out the cutting and fibrillation process，which offers a new approach to the preparation of fibers． In this paper,PET polyester chip Was used as the raw material，which Was prepared to PET fibrid with precipitation method．The influence of the factors such as the concentration of PET slurry,the drop rate of PET slurry,shear rate， shear time and the kind of coagulant on the physicochemical property such as su