PET沉析纤维及其复合纸机械性能的研究

Characterization of PET Fibrid and Mechanical Properties of Its Composite Paper

采用扫描电子显微镜、纤维质量分析仪、比表面积分析仪和X射线衍射仪(XRD)等检测仪器,对自制PET沉析纤维和市售PET浆粕进行表面形貌、比表面积、结晶性能及成纸性能研究。实验结果表明,与市售PET浆粕相比,自制PET沉析纤维呈飘带状,纤维形态柔顺,质轻且较薄,比表面积较大,达6.311 m2/g;纤维结晶度为36.10%,纤维悬浮液分散度达97%,有利于提高成纸匀度和强度;相比于市售PET浆粕和PET短切纤维抄造的纸张,自制PET沉析纤维和PET短切纤维成纸的抗张指数、撕裂指数和伸长率分别提高了6.3%、11.2%、38.8%。

The surface morphology, specific surface area, crystalline properties and papermaking properties of lab-made PET fibrid and commercially available PET pulp were studied using scanning electron microscopy （ SEM ）, FQA, BET surface analyzer and X- ray diffraction （XRD）. The experimental results showed that compared with the commercially available PET pulp, PET fibrids were ribbon, soft, light- weight and thinner, with fiber morphology and larger specific surface area. The crystallinity of the fibrid was 36. 10%, and the dispersity of fibrid suspension reached 97%, which was helpful to improve the formation and mechanical strength of PET sheets. At the same ratio of raw materials, the tensile index, tear index and elongation of the paper prepared with PET fibrid and PET chopped fiber improved by 6. 3%, 11.2% and 38.8%, respectively compared with the paper prepared with commercial PET pulp and chopped fiber.