为了研究Gemini阳离子表面活性剂不同结构是否对低阶煤表面吸附及水煤浆成浆性能有影响,选择Gemini阳离子表面活性剂(C_(12)-3(OH)-C_(12)(SAA-1)和C_(12)-(CH_2)_3-C_(12)(SAA-2))对煤粒表面进行疏水改性,通过对煤粒表面吸附量、水煤...为了研究Gemini阳离子表面活性剂不同结构是否对低阶煤表面吸附及水煤浆成浆性能有影响,选择Gemini阳离子表面活性剂(C_(12)-3(OH)-C_(12)(SAA-1)和C_(12)-(CH_2)_3-C_(12)(SAA-2))对煤粒表面进行疏水改性,通过对煤粒表面吸附量、水煤浆表观粘度和浆体稳定性为考察对象研究其改性效果。结果表明,SAA-2主要以季铵盐的正电荷为活性吸附点,即其饱和吸附量可达到2.95 mg/g,成浆浓度在57%时,表观粘度为723 m Pa·s,接触角为70.89°,Zeta电位为-37.4 mV;SAA-1除了与SAA-2有相同吸附点外,还有羟基与煤粒表面羟基之间的氢键和分子间力的活性吸附点,较SAA-2饱和吸附量增大,可达到3.17 mg/g,成浆浓度在57%时,表观粘度为676 m Pa·s,接触角为85.08°,Zeta电位为-49.6 mV,分散效果最佳。利用Turbiscan Lab稳定性分析仪测得经SAA-1改性水煤浆比SAA-2更稳定。展开更多
In this study, the polyacrylate intraocularr lens is irradiated by argon ion which can produce free radicals. In order to obtain better hydrophilic and lower platelets adhesion, monomer vinyl pyrrolidone (NVP) is graf...In this study, the polyacrylate intraocularr lens is irradiated by argon ion which can produce free radicals. In order to obtain better hydrophilic and lower platelets adhesion, monomer vinyl pyrrolidone (NVP) is grafted onto the hydrophobic polyacrylate intraocular lens surface in a certain reaction conditions. Specific changes in intraocular lens are detected by static contact angle (CA), scanning electron microscope (SEM) and light transmittance. The results show that this surface modification can greatly improve its hydrophilic character and surface formation.展开更多
文摘为了研究Gemini阳离子表面活性剂不同结构是否对低阶煤表面吸附及水煤浆成浆性能有影响,选择Gemini阳离子表面活性剂(C_(12)-3(OH)-C_(12)(SAA-1)和C_(12)-(CH_2)_3-C_(12)(SAA-2))对煤粒表面进行疏水改性,通过对煤粒表面吸附量、水煤浆表观粘度和浆体稳定性为考察对象研究其改性效果。结果表明,SAA-2主要以季铵盐的正电荷为活性吸附点,即其饱和吸附量可达到2.95 mg/g,成浆浓度在57%时,表观粘度为723 m Pa·s,接触角为70.89°,Zeta电位为-37.4 mV;SAA-1除了与SAA-2有相同吸附点外,还有羟基与煤粒表面羟基之间的氢键和分子间力的活性吸附点,较SAA-2饱和吸附量增大,可达到3.17 mg/g,成浆浓度在57%时,表观粘度为676 m Pa·s,接触角为85.08°,Zeta电位为-49.6 mV,分散效果最佳。利用Turbiscan Lab稳定性分析仪测得经SAA-1改性水煤浆比SAA-2更稳定。
基金National Natural Science of Foundation of Chinagrant number:81070716
文摘In this study, the polyacrylate intraocularr lens is irradiated by argon ion which can produce free radicals. In order to obtain better hydrophilic and lower platelets adhesion, monomer vinyl pyrrolidone (NVP) is grafted onto the hydrophobic polyacrylate intraocular lens surface in a certain reaction conditions. Specific changes in intraocular lens are detected by static contact angle (CA), scanning electron microscope (SEM) and light transmittance. The results show that this surface modification can greatly improve its hydrophilic character and surface formation.
