天津工业大学学报2024，Vol.43Issue(3)：32-39,49,9.DOI:10.3969/j.issn.1671-024x.2024.03.005
含聚醚基团阴离子表面活性剂对PMMA表面润湿性的影响
Effects of anionic surfactants containing polyether group on wettability of polymethyl methacrylate surface
摘要
Abstract
In order to explore the wettability regulation mechanism of extendable surfactant molecules with both polyoxyiso-propyl(PO)and polyoxyethylene(EO)groups on the surface of polymethyl methacrylate(PMMA),the wettabil-ity of sodium octadecyl-(polyoxyisopropyl)m-(polyoxyethylene)n-carboxylate(C18POmEOnCOONa,m=5,10,15,and n=5,10,15)solutions of five anionic extendable surfactants with PO and EO groups on the surface of PMMA was tested and analyzed.The effects of PO groups,EO groups,and surfactant concentrations on surface tension(γLV)and contact angle(θ)were investigated and the adsorption parameters such as adhesion tension(γLV cos θ),adhesion work(WA),and solid-liquid interfacial tension(γSL)were calculated.The results show that when the concentration of surfactant is less than the critical micelle concentration(CMC),the C18POmEOnCOONa molecules adsorb at the solution-air interface and PMMA-solution interface,resulting in a decrease in γLV,hy-drophobic alkyl chains facing the aqueous phase,and an increase in γSL.The θ stays consistent at about 75° due to these two important considerations.When the concentration is greater than CMC,C18POmEOnCOONa molecules form saturated adsorption films at both the solution-air and PMMA-solution interface,the interface adsorption parameters remain constant.As the level of concentration keeps increasing,C18POmEOnCOONa molecules con-tinue adsorbing at the PMMA-solution interface and aggregate structure is formed through hydrophobic interac-tion.The hydrophilic group confronting the aqueous phase leads to a rapid decrease in γSL and θ,the θ of C18PO5EO15COONa can be reduced to roughly 43°.The γLV at CMC and the θ at high concentration gradually in-crease with the increase in the number of PO groups.However,the γLV and the θ barely alter when the number of EO groups increases.关键词
延展型表面活性剂/润湿性/聚甲基丙烯酸甲酯(PMMA)/聚氧异丙稀基团(PO)/聚氧乙烯基团(EO)Key words
extendable surfactant/wettability/polymethyl methacrylate(PMMA)/polyoxyisopropyl group(PO)/polyoxye-thylene group(EO)分类
化学化工引用本文复制引用
赵濉,陈兴锋,张磊,严峰,张路..含聚醚基团阴离子表面活性剂对PMMA表面润湿性的影响[J].天津工业大学学报,2024,43(3):32-39,49,9.基金项目
国家重点研发计划资助项目(2019YFA0708700) （2019YFA0708700）
