阳离子型木质素基絮凝剂的半干法合成及在造纸废水处理中的应用  

Hemi-dry Synthesis of Cationic Lignin-based Flocculants and Its Application in Papermaking Wastewater Treatment

作　　者：陈腾飞 郭延柱 初婷婷 刘国兴 韩颖 李海明 孙广卫 CHEN Tengfei;GUO Yanzhu;CHU Tingting;LIU Guoxing;HAN Ying;LI Haiming;SUN Guangwei(Liaoning Province Key Lab of Pulp and Paper Engineering,School of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian,Liaoning Province,116034;Huisheng Group Plain Paper Co.,Ltd.,Dezhou,Shandong Province,510640)

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034 [2]汇胜集团平原纸业有限公司,山东德州253100

出　　处：《中国造纸学报》2019年第4期27-33,共7页Transactions of China Pulp and Paper

基　　金：大连市青年科技之星项目(2017RQ036);兴辽英才计划青年拔尖人才项目(XLYC1807232);辽宁省自然科学基金重点项目(20170520300)资助

摘　　要：在以预水解木质素(PHL)为原料、甲基丙烯酰氧乙基三甲基氯化铵(METAC)为单体、K2S2O8为引发剂条件下,通过自由基聚合反应,半干法合成了阳离子型木质素接枝聚合物(PHLM)。采用元素分析仪、电荷滴定仪、傅里叶红外光谱仪(FT-IR)、核磁共振氢谱分析仪(1H NMR)对制备的PHLM的结构与性能进行表征。以PHLM的溶解度、接枝率和电荷密度作为考核指标,对反应条件进行了优化;并探索了PHLM在造纸废水处理中作为阳离子型絮凝剂的应用效果。结果表明,制备PHLM的最佳条件为:反应浓度60%、METAC/PHL单体摩尔比2∶1、引发剂用量3.0%、pH值4.0、温度80℃,此条件下制备的PHLM溶解度为9.65 g/L,电荷密度为3.88 mmol/g,接枝率为214.93%。当PHLM用量为25 mg/L、pH值为5.0时,PHLM对造纸废水的处理效果最优,浊度和CODCr去除率分别达93.3%和65.6%。The cationic lignin graft polymer(PHLM)was prepared by hemi-dry synthesis through free radical polymerization using PHL(pre-hydrolyzed lignin)as raw material and METAC([2-(methacryloyloxy)ethyl]trimethylammonium chloride)as monomer,K2S2O8 as initiator.The structures and properties of PHLM were characterized by elemental analyzer,charge density analyzer,Fourier transform infrared spectroscopy(FT-IR)and nuclear magnetic resonance spectroscopy(1H NMR)techniques.The reaction conditions were optimized based on the evaluation of the indexs of the solubility,graft ratio and charge density of PHLM.The optimal conditions were found that 60%reaction concentration,2.0 molar ratio of METAC/PHL,3.0%initiator dosage,pH value 4.0,80℃,which generated the PHLM with 9.65 g/L solubility,3.88 meq/g charge density and 214.93%graft ratio.The PHLM was used as flocculant in papermaking wastewater,the flocculation efficiency was the best when the dosage of PHLM was 25 mg/L and the pH value of wastewater was 5.0.The removal efficiency of CODCr and turbidity was up to 65.6%and 93.3%,respectively.

关 键 词：木质素 接枝共聚 PMETAC 絮凝剂 造纸废水 

分 类 号：TS79[轻工技术与工程—制浆造纸工程]