Vapor pressure and surface tension of the aqueous solution of sodium dodecyl sill-fate(SDS)/polyethylene oxide(PEO) were measured at 298.15, 308.15 and 318.15K respectively, the coucentration of PEO was 0.5%, and the ...Vapor pressure and surface tension of the aqueous solution of sodium dodecyl sill-fate(SDS)/polyethylene oxide(PEO) were measured at 298.15, 308.15 and 318.15K respectively, the coucentration of PEO was 0.5%, and the concentration of SDS (mnsds ) was up to 80 mmol.kg-1 The activity coefficient of water at different temperatures was calculated. The effcct of intermolecular interactions on the vapour pressure was discussed. From vapo pressure and surface tension data, the critical aggregate concentration (CAC) and polymer saturation point (PSP) were ob-tained.展开更多
以氢化苯基甲烷二异氰酸酯(H-MDI)、聚氧乙烯十二烷基胺(PAE)、聚乙二醇(PEG)为主要原料,合成了系列侧链含十二烷基、主链嵌入大量聚环氧乙烷(EO)结构的阳-非离子型聚氨酯表面活性剂(PUS)。通过红外光谱(FT-IR)、表面张力、临界胶束浓...以氢化苯基甲烷二异氰酸酯(H-MDI)、聚氧乙烯十二烷基胺(PAE)、聚乙二醇(PEG)为主要原料,合成了系列侧链含十二烷基、主链嵌入大量聚环氧乙烷(EO)结构的阳-非离子型聚氨酯表面活性剂(PUS)。通过红外光谱(FT-IR)、表面张力、临界胶束浓度、乳化力测试等对其进行分析。结果表明:当以PAE为软段单体,以聚乙二醇(PEG-200)为扩链剂时,合成的聚氨酯高分子表面活性剂的综合性能优异,溶液的临界胶束浓度为53.10 mg/L,水溶液的表面张力最低可达38.12 m N/m。展开更多
Mesoporous titania have been prepared using Polyoxyethylene(8) dodecyl ether (Brij35) as template and tetrabutyl titanate as titanium source, effects of the molar ratio of template to titanium source, the calcination ...Mesoporous titania have been prepared using Polyoxyethylene(8) dodecyl ether (Brij35) as template and tetrabutyl titanate as titanium source, effects of the molar ratio of template to titanium source, the calcination temperature and nickel-doped on mesoporous TiO_ 2 were discussed.. The samples formed were characterized with XRD, FT-IR , TG, N_ 2 adsorption and desorption and TEM. The results indicated that mesoporous TiO_ 2 had a big pore diameter and a better stability with Brij35 as template, ratio of template to titanium source had a certain effect on the properties of mesoporous TiO_ 2, The dope of Ni ion has increased the specific surface area of the mesoporous titania.展开更多
文摘Vapor pressure and surface tension of the aqueous solution of sodium dodecyl sill-fate(SDS)/polyethylene oxide(PEO) were measured at 298.15, 308.15 and 318.15K respectively, the coucentration of PEO was 0.5%, and the concentration of SDS (mnsds ) was up to 80 mmol.kg-1 The activity coefficient of water at different temperatures was calculated. The effcct of intermolecular interactions on the vapour pressure was discussed. From vapo pressure and surface tension data, the critical aggregate concentration (CAC) and polymer saturation point (PSP) were ob-tained.
文摘以氢化苯基甲烷二异氰酸酯(H-MDI)、聚氧乙烯十二烷基胺(PAE)、聚乙二醇(PEG)为主要原料,合成了系列侧链含十二烷基、主链嵌入大量聚环氧乙烷(EO)结构的阳-非离子型聚氨酯表面活性剂(PUS)。通过红外光谱(FT-IR)、表面张力、临界胶束浓度、乳化力测试等对其进行分析。结果表明:当以PAE为软段单体,以聚乙二醇(PEG-200)为扩链剂时,合成的聚氨酯高分子表面活性剂的综合性能优异,溶液的临界胶束浓度为53.10 mg/L,水溶液的表面张力最低可达38.12 m N/m。
文摘Mesoporous titania have been prepared using Polyoxyethylene(8) dodecyl ether (Brij35) as template and tetrabutyl titanate as titanium source, effects of the molar ratio of template to titanium source, the calcination temperature and nickel-doped on mesoporous TiO_ 2 were discussed.. The samples formed were characterized with XRD, FT-IR , TG, N_ 2 adsorption and desorption and TEM. The results indicated that mesoporous TiO_ 2 had a big pore diameter and a better stability with Brij35 as template, ratio of template to titanium source had a certain effect on the properties of mesoporous TiO_ 2, The dope of Ni ion has increased the specific surface area of the mesoporous titania.
