http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Khanh B. Vu,Thanh Khoa Phung,Thao T.T. Tran,Clement Mugemana,Ha N. Giang,Truong Le Phuc Nhi 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
Polystyrene was synthesized and applied as a template for fabricating hollow silica nanoparticles. Organic solvent and water were used as a solvent and an anti-solvent, respectively, to produce thepolystyrene nanoparticles via. nanoprecipitation technique. The influence of precipitation method (oneshotor drop), solvent for dissolution of polystyrene, and concentration of polystyrene or CTAB linker onthe diameter of polystyrene nanoparticles was investigated. The hollow silica nanoparticles werefabricated using the as-made polystyrene nanoparticles as a template with the help of CTAB linker. Polystyrene was recovered by the extraction of polystyrene@SiO2 composite with the tetrahydrofuransolvent, and the recovered polystyrene was re-used to make the polystyrene nanoparticles as a templatefor fabricating hollow silica nanoparticles. Our study can be applied for other types of polymericmaterials as long as those polymeric materials form nanoparticles via. nanoprecipitation technique. Incomparison with the polystyrene hard template prepared by emulsion polymerization, the size ofpolystyrene nanoparticles produced by the nanoprecipitation technique can be well-tuned by changingthe polystyrene and linker concentrations.
Khanh B. Vu,Thanh Khoa Phung 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.40 No.-
We employed a variety of catalysts including metallophthalocyanines and metallohexadecafluor-ophthalocyanines for epoxidation of cis-cyclooctene in water as a green solvent. Manganesephthalocyanine and poly(copper phthalocyanine) are highly active while other metallophthalocyanines(Zn, Cu, Ni, Li) are nearly not active. Similarly, copper and cobalt hexadecafluorophthalocyanines showhighly catalytic activity, but zinc hexadecafluorophthalocyanine is inactive. Moreover, iron phthalocya-nine chloride is also a good catalyst while nickel phthalocyanine-tetrasulfonic acid tetrasodium is a poorcatalyst. Copper hexadecafluorophthalocyanine incorporated into hollow silica exhibits much bettercatalytic activity than bulk copper hexadecafluorophthalocyanine. This supported catalyst also gives astable conversion until the fourth cycle of reaction.