改性木质素磺酸钙-丙烯酸酯共聚乳液的制备与表征  

Preparation and Characterization of Modified Lignosulfonate-Acrylate Copolymer Emulsion

作　　者：张永贺 丘雨玲 金立维[1] Zhang Yonghe;Qiu Yuling;Jin Liwei(Institute of Chemical Industry of Forest Products,Chinese Academy of Forestry,Key Laboratory of Biomass Energy and Material Jiangsu Province,Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Jiangsu Province,Key laboratory of Chemical Engineering of Forest Products,National Forestry and Grassland Administration,National Engineering Laboratory for Biomass Chemical Utilization,Nanjing,Jiangsu 210042,China;Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing,Jiangsu 210042,China)

机构地区：[1]中国林业科学研究院林产化学工业研究所,江苏省生物质能源与材料重点实验室江苏省林业资源高效加工利用协同创新中心,国家林业和草原局林产化学工程重点实验室生物质化学利用国家工程实验室,江苏南京210042 [2]南京林业大学林业资源高效加工利用协同创新中心,江苏南京210042

出　　处：《化学世界》2020年第10期691-695,共5页Chemical World

基　　金：重点研发计划国合专项(No.2017YFE0106800)资助项目。

摘　　要：以丙烯酰氯(AC)改性木质素磺酸钙(LS),制备了木质素磺酸钙大分子单体(AC-LS),并经乳液聚合制备了木质素基丙烯酸酯共聚乳液。结果表明:改性木质素磺酸钙红外谱图中,在1723 cm-1处出现了新的酯基吸收峰;核磁共振谱图中,在δ6.7、6.4、6.1处出现了新的乙烯基质子峰(CH=CH2);紫外吸收谱图中,最大吸收波长出现了红移、最大吸收强度增强,表明丙烯酰氯成功接枝到木质素磺酸钙上。另外,对聚合物进行了表征,结果表明:共聚乳液固含量、单体转化率、AC-LS转化率、接枝率随木质素磺酸钙添加量增加而降低;共聚乳液粒径及分散度随木质素磺酸钙添加量的增加而增大;聚合物紫外吸收测试表明随AC-LS添加量的增加,聚合物膜紫外吸收逐渐增强。Calcium lignosulfonate(LS)was modified by acryloyl chloride(AC)to prepare calcium lignosulfonate macromonomer(AC-LS)so that lignin-based acrylate emulsion was successfully prepared by emulsion polymerization.The results showed that a new peak appeared at 1723 cm-1 in the infrared spectrum of modified lignosulfonate,which was assigned to ester group.1H NMR spectrum showed that new vinyl proton peaks appeared atδ6.7,6.4,and 6.1.The maximum absorption wavelength was red-shifted in UV spectrum and the maximum absorption intensity was enhanced.All these evidences indicated that acryloyl chloride was successfully grafted onto calcium lignosulfonate.In addition,with the addition of calcium lignosulfonate,the solid content of emulsion,monomer conversion,AC-LS conversion and grafting rate decreased,while the particle size and dispersion of emulsion increased.UV absorption test showed that with the increase of the amount of AC-LS,UV absorption of polymer gradually increased.

关 键 词：木质素磺酸钙 丙烯酰氯 接枝改性 乳液聚合 紫外吸收 

分 类 号：TQ325[化学工程—合成树脂塑料工业] O632[理学—高分子化学]