提高溶解浆纯度的研究进展

Research Progress on Improving the Purity of Dissolving Pulp

溶解浆是α-纤维素含量高于90%的漂白浆,是多种纤维素工业产品的制造原料,而纤维素工业产品不仅是制药、食品、化妆品和其他工业领域的重要添加剂之一,还可用来制作手机屏幕等电子产品零件,这些均对溶解浆的纯度和质量提出了更高的要求。溶解浆的纯化是通过提高α-纤维素含量、去除溶解浆中半纤维素、木质素-碳水化合物(LCC)等杂质来实现的。本文对溶解浆的纯化方法进行了综述,对比分析了生物纯化法、化学纯化法及组合纯化法等;并剖析了各种纯化技术的机理;归纳了各种纯化溶解浆技术的优缺点;提出了制备高纯度溶解浆的研究方向和思路。

Dissolving pulp was a bleached pulp withα-cellulose content higher than 90%,as a raw material for the manufacturing of various cellulose industrial products,was not only an important additive in pharmaceuticals,food,cosmetics,and other industrial fields,but also used to make materials such as mobile phone screens.Therefore,the purity and quality requirements for dissolving pulp were constantly improved.Purification of dissolving pulp through physical and chemical methods to improveα-cellulose content,removal of hemicellulose,lignin carbohydrate(LCC),and other impurities in dissolving pulp were effective methods to improve the purity of dissolving pulp.This review compared and analyzed the purification methods of dissolving pulp,including biological,chemical,and their combination methods.It also analyzed the mechanisms of various purification technologies,summarized the advantages and disadvantages of each technology in purifying dissolving pulp,and proposed ideas and methods for preparing high-purity dissolving pulp.