高白度竹纤维的常压提取工艺  

Study on the extraction of high whiteness bamboo fiber at atmospheric pressure

作　　者：周伟[1] 邱祖民[1,2] 肖建军[2] 杜成成 

机构地区：[1]南昌大学资源环境与化工学院,江西南昌330031 [2]南昌大学化学学院,江西南昌330031

出　　处：《化工进展》2017年第2期658-664,共7页Chemical Industry and Engineering Progress

基　　金：江西省科技攻关项目(20121BBG70002)

摘　　要：为了制备高白度的竹纤维,先用甲酸/乙酸/水预处理竹粉原料(记为A),再使用甲酸/乙酸/H_2O_2提取竹粉纤维素(记为A_p);通过单因素分析法探讨了甲酸/乙酸比例、H_2O_2用量、固液比、反应温度及反应时间等因素对产品得率和白度的影响;然后在碱性条件下用H_2O_2进行TCF漂白(记为P),考察了Na OH用量、H_2O_2用量、固液比、反应温度和反应时间对产品得率和白度的影响;同时研究了多步处理工艺提取的效果,得到白度较高的纤维素产品。当A_p段工艺条件选取V(甲酸)∶V(乙酸)=40∶60,固液比1∶10(g/m L),添加9%的H_2O_2溶液,先在60℃搅拌0.5h,再升温至90℃反应2h;且P段工艺条件选取H_2O_2用量为5%,Na OH用量为6%,固液比为1∶10(g/m L),反应温度为90℃,反应时间为2h,在此条件下经AAA_pA_pPP处理得到的产品白度高达90.5%。To prepare the high whiteness bamboo fiber,the raw material,bamboo powder,was first pre-treated by formic acid/acetic acid/H2O（symbol A）. Then,the middle product bamboo cellulose was extracted by formic acid/ acetic acid/H2O2（symbol Ap）. The effect of formic acid/acetic acid volume ratio,H2O2 dosage,solid-liquid ratio（g/m L）,reaction temperature and reaction time on the product yield and whiteness was analyzed using univariate analysis. After that,the effect of Na OH dosage,H2O2 dosage,solid-liquid ratio（g/m L）,reaction temperature and reaction time on the product yield and whiteness were discussed in TCF bleaching with Na OH/H2O2 system（process P）. Simultaneously,the influence of multi-step treatment to extract cellulose was investigated. When the volume ratio of Formic acid/Acetic acid was 40∶60,solid-liquid ratio was 1∶10（g/m L）,and dosage of H2O2 solution was 9%（V%）,the mixture was first stirred for 0.5h at 60℃,then the reaction temperature was raised to 90℃and maintained for 2h Under the process condition of 5% H2O2,6% Na OH,solid-liquid ratio 1∶10（g/m L）,stirring at 90℃ for 2h,the whiteness of the product by AAApApPP treatment was up to 90.5%.

关 键 词：竹粉 甲酸 乙酸 全无氯清洁漂白技术 纤维素 

分 类 号：TQ352.9[化学工程]