氢氧化钠-硫脲-尿素体系中温预处理对玉米秸秆磨浆性能的影响  

The effect on refining property of corn straw after the pre-treatment of NaOH-thiourea-urea system under medium temperature condition

作　　者：翟睿 王慧丽[2] 周小凡[3] ZHAI Rui;WANG Hui-li;ZHOU Xiao-fan(Zhejiang Provincal Key Laboratory of Recycling and Eco-treatment of Waste Biomass,Hangzhou 310023,China;Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education/Shandong Province,Qilu University of Technology,Jinan 250353,China;Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]浙江科技学院浙江省废弃生物质循环利用与生态处理技术重点实验室,杭州310023 [2]齐鲁工业大学制浆造纸科学与技术教育部/山东省重点实验室,济南250353 [3]南京林业大学制浆造纸江苏省重点实验室,南京210037

出　　处：《中华纸业》2019年第20期21-26,共6页China Pulp & Paper Industry

基　　金：制浆造纸科学与技术教育部/山东省重点实验室开放基金项目（KF201718）

摘　　要：为探究碱脲体系在中温条件下对木质纤维原料磨浆性能的影响,在本课题中利用氢氧化钠-硫脲-尿素体系处理玉米秸秆,在中温以及高纤维浓度(20%)的条件下,通过单因素试验探求其最佳预处理工艺。结果表明:在浸渍时间15min、用碱量6%、处理温度70℃、处理时间60min的条件下,该原料的磨浆性能可得到有效改善。与经氢氧化钠水溶液预处理后制得漂白化学机械浆相比,经氢氧化钠-硫脲-尿素体系预处理制得漂白化学机械浆细浆得率、白度、抗张指数和耐破指数分别提高2.28%、5.94%、18.8%和20.5%,磨浆能耗和松厚度分别降低16.1%和4.65%。此外两种漂白浆纤维中元素含量差别不大。In order to study the effect on the refining property of lingo-cellulose fibers with the treatment of NaOH-urea system at medium temperature,the NaOH-thiourea-urea system was used to treat corn straw and the optimal treating conditions were determined through the single factor tests under medium temperature and high fiber concentration(20%).The results showed that the optimal conditions are chosen as the soaking time of 15min,alkali charge of 6%,treating temperature of 70℃and treating time of 60min.Compared with those of the bleached chemi-mechanical pulp of corn straw prepared by NaOH aqueous solution,the accept yield,whiteness,tensile index and burst index of the bleached pulp prepared by NaOH-thiourea-urea system were increased by 2.28%,5.94%,18.8%and 20.5%respectively,and the refining energy and bulkiness are decreased by 16.1%and 4.65%respectively.Besides,there were no remarkable variations on the organic element contents.

关 键 词：氢氧化钠-硫脲-尿素体系 中温 玉米秸秆 磨浆性能 

分 类 号：TS752[轻工技术与工程—制浆造纸工程] TS749.4