摘要
本研究以预水解硫酸盐未漂竹浆为原料,采用“氧脱木质素(O)-氯漂(D0)-氧和过氧化氢强化碱抽提(Eop)-氯漂(D_(1))”的漂白工艺制备可用作溶解浆的竹浆。通过优化各工段的处理条件(氧漂白段:氢氧化钠用量2.0%、氧压0.5 MPa、反应时间60 min、反应温度95℃;D0漂白段:二氧化氯用量3.5%、反应时间80 min、反应温度70℃、初始pH值4.0;Eop漂白段:过氧化氢用量1.4%、氧压0.2 MPa、反应时间90 min、反应温度90℃、初始pH值11.5;D1漂白段:二氧化氯用量1.5%、反应时间150 min、反应温度70℃、初始pH值4.0),最终制备白度82.7%、黏度440.0 mL/g、灰分含量0.24%、α-纤维素含量90.92%的竹浆。
Using pre-hydrolyzed sulfate unbleached bamboo pulp as raw material,the dissolved bamboo pulp was prepared by the bleaching process of“oxygen delignification(O)-first stage chlorine bleaching(D0)-oxygen and hydrogen peroxide enhanced alkali extraction(Eop)-second stage chlorine bleaching(D1)”.The treatment conditions of each section were optimized(O bleaching stage:sodium hydroxide dosage of 2.0%,oxygen pressure of 0.5 MPa,reaction time of 60 min,reaction temperature of 95℃;D0 bleaching stage:chlorine dioxide dosage of 3.5%,reaction time of 80 min,reaction temperature of 70℃,the initial pH value of 4.0;Eop bleaching stage:hydrogen peroxide dosage of 1.4%,oxygen pressure of 0.2 MPa,reaction time of 90 min,reaction temperature of 90℃,initial pH value of 11.5;D1 bleaching stage:chlorine dioxide dosage of 1.5%,the reaction time of 150 min,the reaction temperature of 70℃,the initial pH value of 4.0),and the final prepared bamboo pulp whiteness reached 82.7%,with viscosity of 440 mL/g,ash content of 0.24%,α-cellulose content of 90.92%.
作者
牛胜玥
罗西尧
林凯睿
杨嘉玮
高亚锋
胡会超
李建国
陈礼辉
NIU Shengyue;LUO Xiyao;LIN Kairui;YANG Jiawei;GAO Yafeng;HU Huichao;LI Jianguo;CHEN Lihui(College of Materials Engineering,National Forestry&Grassland Administration Key Lab for Plant Fiber Functional Materials,Fujian Agriculture and Forestry University,Fuzhou,Fujian Province,350108)
出处
《中国造纸》
CAS
北大核心
2024年第7期24-31,共8页
China Pulp & Paper
基金
国家重点研发计划(2023YFD2201903)
福建省引导性项目(2023H0008)。
