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- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 차국헌
- 발행연도
- 2016
- 저작권
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With an enormous production of elemental sulfur from mainly hydrodesulfurization of fossil fuels, an excess amount has been stored worldwide making issues of sulfur management more important with respect to environmental and economic aspect. Elemental sulfur and sulfur containing materials are probable to be exploited for applications such as high refractive index polymers, electrochemical secondary batteries, and coatings. However, solubility of sulfur and sulfur containing materials is quite low due to solvent resistance which leads to restriction on direct processing of elemental sulfur.
Herein we report a synthesis and surface modification of well-defined polysulfide polymer nanoparticles from sodium polysulfide of various ranks and 1,2,3-trichloropropane in aqueous solution obtained in the presence of cationic surfactants. Exploiting cationic surfactants which play dual role as phase transfer catalyst results in high sulfur content nanoparticles during interfacial polymerization between organic monomer and aqueous polysulfide. The average size of the nanoparticles is controlled along with the surfactant concentration and polysulfide rank. Control of sulfur content of the polysulfide polymer nanoparticles is enabled by varying polysulfide rank, the number of sulfur atoms in the polysulfide chain, which leads to pre-determined sulfur content nanoparticles. By using sulfur-sulfur dynamic covalent bonding above 80 ?C, further surface modification of the nanoparticles with alkene containing cationic surfactant is also achieved.
Herein we report a synthesis and surface modification of well-defined polysulfide polymer nanoparticles from sodium polysulfide of various ranks and 1,2,3-trichloropropane in aqueous solution obtained in the presence of cationic surfactants. Exploiting cationic surfactants which play dual role as phase transfer catalyst results in high sulfur content nanoparticles during interfacial polymerization between organic monomer and aqueous polysulfide. The average size of the nanoparticles is controlled along with the surfactant concentration and polysulfide rank. Control of sulfur content of the polysulfide polymer nanoparticles is enabled by varying polysulfide rank, the number of sulfur atoms in the polysulfide chain, which leads to pre-determined sulfur content nanoparticles. By using sulfur-sulfur dynamic covalent bonding above 80 ?C, further surface modification of the nanoparticles with alkene containing cationic surfactant is also achieved.
목차
Ⅰ. Introduction 1Ⅱ. Experimental Details 81. Materials 82. Synthesis of polysulfide polymer nanoparticles 83. Analysis of polysulfide polymer nanoparticles 94. Synthesis of 10-undecenyl-trimethylammonium bromide (UTAB) and surface modification 10Ⅲ. Results & Discussion 12Ⅳ. Conclusion 37References 38국문 초록 44
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