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生物质化学工程 ›› 2019, Vol. 53 ›› Issue (6): 22-26.doi: 10.3969/j.issn.1673-5854.2019.06.004

• 研究报告 • 上一篇    下一篇

十一烯酸基乳化剂制备及应用研究

张永贺1,2,付高位1,2,金立维1,*()   

  1. 1. 中国林业科学研究院 林产化学工业研究所; 生物质化学利用国家工程实验室; 国家林业和草原局 林产化学工程重点实验室; 江苏省 生物质能源与材料重点实验室, 江苏 南京 210042
    2. 南京林业大学 江苏省林业资源高效加工利用协同创新中心, 江苏 南京 210037
  • 收稿日期:2018-11-15 出版日期:2019-11-30 发布日期:2019-12-10
  • 通讯作者: 金立维 E-mail:liwei-jin@163.com
  • 作者简介:张永贺(1996—),男,山东菏泽人,硕士生,主要从事生物基高分子材料的研究工作
  • 基金资助:
    国家重点研发计划资助项目(2017YFE0106800)

Preparation and Application of Emulsifier Based on Undecylenic Acid

Yonghe ZHANG1,2,Gaowei FU1,2,Liwei JIN1,*()   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2018-11-15 Online:2019-11-30 Published:2019-12-10
  • Contact: Liwei JIN E-mail:liwei-jin@163.com
  • Supported by:
    国家重点研发计划资助项目(2017YFE0106800)

摘要:

利用十二醇(DA)与十一烯酸(UA)/马来酸酐(MAH)共聚物通过酯化反应制备了UMA-DA聚合物,并将聚合物作为乳化剂用于UA与甲基丙烯酸甲酯(MMA)的乳液聚合中。FT-IR分析表明:DA中的羟基与UMA共聚物中的酸酐发生了反应。1H NMR结果表明:在δ 3.2~3.4处有明显的—O—CH2—质子信号,表明成功制备了UMA-DA共聚物。通过表面张力法对UMA皂化物的临界胶束浓度(CMC)值进行了测定,UMA-DA的CMC值为9.6 g/L,此时表面张力γCMC为23.04 mN/m, UMA-DA的γCMC值要远低于纯水(71.97 mN/m)。在乳液聚合时,随UMA-DA用量的不断增加,乳液粒径和粒径分散系数(PDI)增大,凝胶率逐渐减小。当自制乳化剂UMA-DA用量为总单体的10%且UA与MMA质量比10 : 90时乳液较为稳定,总单体转化率为98.1%。

关键词: 乳化剂, 十一烯酸, 马来酸酐, 十二醇

Abstract:

Undecylenic acid/maleic anhydride-dodecanol (UMA-DA) polymer was prepared by esterification reaction using dodecanol(DA) and undecylenic acid(UA)/maleic anhydride(MAH) as copolymer.The polymer is used as an emulsifier in the emulsion polymerization of UA and methyl methacrylate(MMA). FT-IR analysis showed that the self-made undecylenic acid/maleic anhydride(UMA) copolymer acted with DA by esterification of an acid anhydride with a hydroxyl group.The proton signal at δ 3.2-3.4 of —O—CH2—in 1H NMR show that UMA-DA copolymer was prepared successfully.The critical micelle concentration(CMC) value of UMA saponification was determined by surface tension method. The CMC value of UMA-DA was 9.6 g/L, and the surface tension γCMC was 23.04 mN/m. The γCMC value of UMA-DA is much lower than that of pure water(71.97 mN/m). The particle size and particle size distribution index(PDI) increased, butthe gel rate gradually decreasedwith the increase of UMA-DA dosage in emulsion polymerization. The emulsion is relatively stable, and the total monomer conversion rate reaches 98.1% when the amount of the self-made emulsifier UMA-DA is 10% of the total monomer and the ratio of UA to MMA is 10 : 90.

Key words: emulsifier, undecylenic acid, maleic anhydride, dodecanol

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