NEW FILMS PRODUCED BY MICROFIBRILLATED NATURAL FIBERS

在不使用有机溶剂的情况下，利用天然纤维的微纤维形成薄膜已被尝试过。以木浆（云杉浆和常用的漂白牛皮纸浆）、束膜素、壳聚糖、蚕丝、胶原蛋白为原料，采用超细研磨法制备微纤维的水悬浮液膜。所得薄膜厚度约为10 μ m ~ 10 μ m，均匀、坚固、半透明，通过拉伸试验对薄膜的力学性能进行了评价。它们的拉伸断裂强度高于商业印刷级纸b。不同的微纤维可以通过水悬浮液混合，并通过这种方法生产出新的天然纤维混合复合材料。此外，这些薄膜都是可生物降解的，对环境无害，不使用有机溶剂。

A formation of film without using organic solvent has been attempted using microfibrils of natural fibers. It was tried to obtained the films from the water-suspension of microfibrils, which are made from wood pulp ezo spruce and popular bleached kraft pulp), tunicin, chitosan, silk and collagen mechanically by using super grinding method. The obtained films were individually about some mum-some 10 mum thick being homogeneous, strong and translucent, The mechanical properties of films were evaluated by tensile test. Their tensile breaking strength is higher than those of commercial printed-grade paper B.Blending of dofferent microfibrils is possible using water-suspension of them, and new hybrid-composites of natural fibers are produced by this method. Furthermore, these films are all biodegradable and harmless to environment without using an organic solvent.