化学氧化预处理对MFC性能的影响  

The Effect of Chemical Oxidation Pretreatment on the Preparation of Microfibrillated Cellulose(MFC)

作　　者：张俊华[1,2] 宋海农[1] 林鹿[2] 刘新亮[1] 

机构地区：[1]广西大学轻工与食品工程学院,广西南宁530004 [2]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《中国造纸学报》2009年第3期24-27,共4页Transactions of China Pulp and Paper

基　　金：广西自然科学基金项目(桂科自0640007);创新团队研究计划(IRT0552);863计划(2007AA05Z408);国家科技支撑计划(2007BAD34B01);国家自然科学基金(50776035;U0733001);教育部博士点基金(20070561038)

摘　　要：以漂白硫酸盐竹浆为原料,结合PFI磨的前期磨浆预处理和高压均质机的后期高压均质化处理制备微纤化纤维素(MFC),探讨了由2,2,6,6-四甲基哌啶氧化物自由基(TEMPO)、NaClO和NaBr组成的氧化体系的主要工艺参数(TEMPO、NaBr及NaOH用量)对竹浆MFC主要性能(如相对保水值)的影响,确定了最佳的化学预处理工艺。基于氧化后浆料的黏度与最终所得MFC的相对保水值之间的关系以及在优化氧化条件下NaOH用量与氧化后浆料黏度的关系,建立了预测MFC相对保水值的数学方程。MFC can be obtained from bleached KP bamboo pulp using a procedure containing PFI mill pretreatment and high pressure homogenization. A chemical oxidation system is consisted of TEMPO, NaCIO and NaBr, the effects of chemical oxidation pretreatment parameters such as the dosages of TEMPO, NaBr and NaOH on the main property such as relative water retention value （WRV） of bamboo MFC were investigated, and the optimal chemical pretreatment process was also defined. A mathematic equation for predicting the relative WRV of MFC, which is based on the relation between the viscosity of the oxidized pulp and the relative WRV of MFC, the relation between the viscosity of the oxidized pulp and the dosage of NaOH in the optimized oxidation condition, was established.

关 键 词：MFC 化学氧化 TEMPO 竹浆 

分 类 号：TS102.64[轻工技术与工程—纺织工程]