http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Preparation, characterization, and properties of novel meglumine-based polysiloxane surfactants
Yanyun Bai,Jinxing Li,Xiumei Tai,Guoyong Wang 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.84 No.-
A series of meglumine-based polysiloxane surfactants, (PSim-n) with different numbers of megluminebranches were prepared. The formed surfactants were characterized by FT-IR and NMR techniques. Physiochemical properties, such as surface activity, aggregation behavior, and wettability, were closelyexamined and used to differentiate the various samples. Thefindings demonstrate that PSim-n surfactantspossess high surface activity and can wet-out a parafilm surface at all but extremely low concentrations. Furthermore, PSi6-4, the surfactant with the highest meglumine concentration, can form larger complexaggregates in aqueous solutions.
Jixian Shen,Yanyun Bai,Qiwen Yin,Wanxu Wang,Xiaoyuan Ma,Guoyong Wang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.56 No.-
A novel cationicfluorinated surfactant, (PFP-AI), was synthesized via amidation and quaterisationsuccessively with perfluorinated acylfluride (PFPF) as starting material. Their structure was analyzed byFT-IR, 1H NMR and 19F NMR. The TG indicated the PFP-AI possess thermal stability with initiationdecomposition temperatures about 217 C. The physicochemical properties of PFP-AI were studiedsystematically by equilibrium surface tension, dynamic surface tension, dynamic light scattingmeasurement (DLS) and transmission electron microscopy (TEM). The results revealed the PFP-AIexhibited high surface activity (gcmc = 16.4 mN/m) and could aggregate into vesicles at the concentrationof 4.15 mmol/L. Furthermore, contact angle measurements demonstrated that PFP-AI exhibited efficientwettability on the hydrophobic surface.
Pengxiao Fang,Yanyun Bai,Xiaoyuan Ma,Xiumei Tai,Wanxu Wang,Guoyong Wang 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.59 No.-
Novel polysiloxane amphiphiles obtained by introducing coal-based amphiphiles (butynediol ethoxylate) into polysiloxanes based on hydrosilylation reaction by two steps: first, synthesizing hydride terminated polysiloxane with different degree of polymerization (HTP); second, butynediol-ethoxylate was grafted on hydride terminated polysiloxane at terminals to get bola coal-based polysiloxane amphiphiles (EO-PSi-EO). In our work, EO-PSi-EO were compared together to investigate the impacts of different ratios of hydrophilic and hydrophobic groups on its properties. A conclusion was obtained from the work that EO-PSi-EO with various hydrophobic backbones have low surface tension, rich aggregate behavior, excellent wetting property and low foam.
Qiwen Yin,Wanxu Wang,Wei Xue,Yanyun Bai,Xiaoyuan Ma,Zhiping Du,Guoyong Wang 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.42 No.-
Sodium perfluoropolyether carboxylate (PFPE-Na) was synthesized via hydrolyzing the correspondinghexafluoropropylene oxide oligomer (PFPF). The structure of PFPE-Na was characterized by FT-IR and 19FNMR. The micellization and aggregation properties of PFPE-Na surfactant in aqueous solution werestudied systematically using equilibrium surface tension, electrical conductivity, dynamic surfacetension, steady-statefluorescence, transmission electron microscopy (TEM) and contact anglemethodologies. The results of equilibrium surface tension at 25 C showed that the critical micelleconcentration (CMC) and the surface tension at CMC (gCMC) of PFPE-Na aqueous solution are lower thansodium perfluorooctanoate [NaPFO, C7F15COONa], which revealing that as a kind of environment-friendly surfactant, PFPE-Na is a perfect substitute of NaPFO. Electrical conductivity measurementsimplied that the micellization of PFPE-Na in aqueous solution was an exothermic and entropy-drivenprocess in the range of temperature investigated. Steady-statefluorescence and transmission electronmicroscopy (TEM) may indicate that PFPE-Na self-assemble in aqueous solution to form larger sphericalaggregates with the increase of concentration. In addition, dynamic surface tension measurements ofPFPE-Na solution showed an extremely efficient adsorption at concentrations above CMC while thedetermination of contact angle of PFPE-Na showed the wetting ability was general.
Bo Ning,Yan Wang,Mi Zhang,Yanyun Bai,Xiumei Tai,Wanxu Wang,Guoyong Wang 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.94 No.-
Foam is used in manyfields with excellent performance. Moreover, disinfectants with ethanol as themain ingredient have increasingly been used in people's lives. However, the foam research of an ethanolwatermixed system is still in the initial stage. In this work, a perfluoroalkyl polyoxyethylene etherphosphate salt surfactant (FEP-Na) was synthesized through a new molecular design. The surfactant hasgood interfacial adsorption behavior in 50% ethanol-water mixing system, and the approximatelyspherical aggregates are observed in the volume phase of the solution. Moreover, FEP-Na showed goodfoaming property in 50% ethanol-water mixed solution. Interestingly, high concentration solutions withhigh surface activity have lower foam stability. And under the microscope, we see that the bubble burst isdominated by the phenomenon of coalescence. In this regard, we explain the mechanism of foamstability by electrostatic double layer theory and interfacial dilation rheology. It provides a new choice forthe synthesis of foaming agent in the ethanol-water mixed system at a concentration of 50%.