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Preparation of Organic Nanoacid Catalyst for Urethane Formation
Zi-jian Chen,Wei-qiang Zhong,Dong-lin Tang*,Guang-zhao Zhang
Author NameAffiliationE-mail
Zi-jian Chen School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China  
Wei-qiang Zhong School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China  
Dong-lin Tang* School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China msdltang@scut.edu.cn 
Guang-zhao Zhang School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China  
Abstract:
Metal-free catalysts are preferred during these days in organic synthesis or in polymerizations.Sulfonic acid is reported to be efficient in catalyzing reactions between isocyanates and alcohols.In this work,synthesis of sulfonic acid immobilized organic nanoparticles (nanoacid) and its application in catalyzing urethane formation,are elaborated.The nanoacid can be simply prepared by miniemulsion polymerization with a reactive surfactant,namely sodium 4-((perfluoronon-8-en-1-yl) oxy) benzenesulfonate,followed by an acidification.From the images of scanning electron microscope,the nanoacid obtained is found to be narrowly dispersed and the average diameter is around 90 nm.The measured sulfur content is 0.5%,from which the content of sulfonic acid in the nanoparticles is calculated to be 0.16 mmol/g.When catalyzing urethane formation based on hexamethylene diisocyanate and n-butanol,the nanoacid catalyst exhibits considerable efficiency.
Key words:  Nanoacid  Catalysis  Urethane  Miniemulsion
FundProject:This work is supported by the National Natural Science Foundation of China (No.21404040),the Fundamental Research Funds for the Central Universities (No.2015ZM053) and the State Key Laboratory of Pulp and Paper Engineering (No.201538).
氨基甲酸酯催化剂有机纳米酸的制备
陈梓健,钟伟强,汤栋霖*,张广照
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DOI:10.1063/1674-0068/30/cjcp1703060
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