摘要
本研究采用正丁醇和乙醇2种有机溶剂对玉米芯碱木质素进行分级,得到反应活性高、反应可及性好的木质素组分(F1和F2),以[2-(甲基丙烯酰氧基)3-乙基]三甲基氯化铵(METAC)为接枝单体、偶氮二异丁腈(AIBN)为引发剂,通过自由基聚合制备木质素絮凝剂(FX-LBF),探究不同制备条件(METAC用量、反应温度、反应时间)及外部环境(FX-LBF添加量、悬浮液浓度、pH值和共存离子)对FX-LBF絮凝效果的影响。结果表明,在METAC∶FX质量比=6∶1、反应温度50~60℃、反应时间3~4 h下制备的FX-LBF絮凝效果最好,其中采用乙醇分级木质素制备的F2-LBF对烟草薄片模拟白水(高岭土悬浮液)的去除率为98.9%,对造纸法烟草薄片生产线浓白水中悬浮物的去除率达98.0%。同时,通过调整外部环境因素发现,烟草薄片模拟白水最优去除率仍能在88.0%以上,表明分级木质素制备的FX-LBF具有良好的环境适应性。
This paper employed two organic solvents(n-butanol and ethanol)to fractionate corn cob alkaline lignin,yielding lignin compo⁃nents(F1,F2)characterized by high reactivity and excellent accessibility for reactions.Utilizing 2-(methacryloyloxy)3-ethyl trimethylam⁃monium chloride(METAC)as the grafting monomer and azobisisobutyronitrile(AIBN)as the initiator,lignin flocculant(FX-LBF)was syn⁃thesized through free radical polymerization.This paper explored the effects of various preparation conditions(METAC dosage,recation tem⁃perature,and recation time)and external environmental factors(FX-LBF dosage,suspension concentration,pH value,and coexisting ions)on the flocculation efficacy of FX-LBF.The results showed that FX-LBF prepared with METAC∶FX mass ratio of 6∶1,reaction temperature of 50~60℃,and reaction time of 3~4 h exhibited the optimal flocculation performance.Notably,the removal rate of F2-LBF prepared with ethanol graded lignin on simulated white water of reconstituted tobacco sheets(Kaolin suspension)was 98.9%,and the removal rate of sus⁃pended matter in concentrated white water of reconstituted tobacco sheets production line was 98.0%.Furthermore,by modulating external environmental variables,it was observed that the optimal removal rate for reconstituted tobacco sheets simulated white water remained above 88.0%,indicating that FX-LBF prepared from graded lignin pos⁃sessed robust environmental adaptability.
作者
胡念武
魏烁果
王亮
郑开
王亦欣
舒灏
刘奔
万超
王磊
HU Nianwu;WEI Shuoguo;WANG Liang;ZHENG Kai;WANG Yixin;SHU Hao;LIU Ben;WAN Chao;WANG Lei(China Tobacco Hubei Industrial Co.,Ltd.,Wuhan,Hubei Province,430040;Hubei Xinye Reconstituted Tobacco Development Co.,Ltd.,Wuhan,Hubei Province,430056;Applied Technology Research of Reconstituted Tobacco Hubei Province Key Lab,Wuhan,Hubei Province,430040;Hubei Provincial Key Lab of Green Materials for Light Industry,Hubei University of Technology,Wuhan,Hubei Province,430068)
出处
《中国造纸》
北大核心
2025年第4期42-49,共8页
China Pulp & Paper
关键词
木质素
有机溶剂分级
絮凝剂
模拟白水
lignin
oragnic solvent fractionation
flocculant
simulated white water
