Cellulose products are commonly prepared through the well - known viscose process or the cuprammonium method . both these two methods have serious environmental pollution . the green nmmo process using n - methyl - morpholine - n - oxide ( nmmo ) as the direct solvent of cellulose can be used to prepare the biodegradable cellulose membranes with improved mechanical properties and controllable pores 90年代开发的nmmo工艺采用n -甲基吗啉- n -氧化物( nmmo )作为直接溶剂来溶解纤维素，利用该绿色工艺可以制备力学性能优越、可生物降解、微孔孔径易于控制的纤维素膜。
