水性环氧复合乳化剂的合成及性能

doi:10.3724/SP.J.1095.2014.30213

摘要/Abstract

摘要： 以环氧树脂E-44、2-氨基-5-磺酸基苯甲酸、乙二醇丁醚和正丁醇为原料，合成一种新型阴离子环氧乳化剂EP-D；同时，E-44和聚乙二醇(PEG6000)以摩尔比2∶1反应，合成端环氧基非离子环氧乳化剂EP-PEG；将EP-D与EP-PEG按不同质量比复配获得不同配比的EP-D/EP-PEG水性环氧复合乳化剂。分别研究了EP-D/EP-PEG及EP-PEG在环氧树脂中加入质量分数为6%~12%时的乳化性能及形成乳液的表面张力、电导率和胶粒的Zeta电位、粒径。结果表明，当EP-D和EP-PEG以质量比3∶5复配，总加入质量分数为9%时，制备的环氧乳液性能最佳。与EP-PEG形成的环氧乳液相比，复配环氧乳化剂用量少，乳液铺展性好、稳定性高，且乳液在相反转时的固含量提高了10%以上。复配环氧树脂乳液中胶粒的Zeta电位为-41.9 mV、粒径为342 nm、表面张力为25.5 mN/m、粘度为14 mPa·s。这表明利用乳化剂EP-D与EP-PEG复配新合成的EP-D/EP-PEG水性环氧复合乳化剂可制备稳定性好，固含量高的乳液。

关键词: 乳化, 水性环氧乳液, 复配, 稳定性

Abstract: A novel anionic epoxy emulsifier EP-D was synthesized by epoxy resin E-44, 2-amino-5-sulfobenzoic acid, ethylene glycol monobutyl ether and butyl alcohol. Nonionic epoxy emulsifier EP-PEG was synthesized from E-44 and poly(ethylene glycol)(PEG6000) with molar ratio of 2∶1. EP-D/EP-PEG composite emulsifiers were obtained by mixing EP-D and EP-PEG with different mass ratio. The emulsifying properties and emulsion surface tension, electric conductivity, the Zeta potential and particle size of colloidal particles were studied when the addition amount of EP-D/EP-PEG and EP-PEG was 6%~12% respectively. The best performance of epoxy emulsion was observed when the mass ratio of EP-D and EP-PEG was 3∶5, and their total quantity reached to 9%. Compared with EP-PEG emulsion system, EP-D/EP-PEG emulsion system led to less emulsifier dosage, better emulsion spreadability, higher stability, and elevation of the solid content by more than 10% in phase inversion, The Zeta potential of the epoxy colloidal particles of reached to -41.9 mV. The emulsion particles size decreased to 342 nm. The emulsion surface tension decreased to 25.5 mN/m. The viscosity was reduced to 14 mPa·s. These indicated that a waterborne epoxy emulsion with good stability and high solid content can be obtained from EP-D/EP-PEG composite emulsifier by mixing new synthetic emulsifiers EP-D and EP-PEG.

Key words: emulsifying, waterborne epoxy emulsion, mixin, stability

中图分类号:

O648

黄娟萍, 李素芳, 李娇, 康萌, 王聪聪, 刘婷婷. 水性环氧复合乳化剂的合成及性能[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30213.

HUANG Juanping, LI Sufang*, LI Jiao, KANG Meng, WANG Congcong, LIU Tingting. Synthesis and Properties of Waterborne Epoxy Composite Emulsifier[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30213.

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