The results showed that TiGeW12O40/TiO2 is a good catalyst for glucose esterification, and the optimum reaction conditions are as follows: glucose 0. 025 mol, emulsifying agent 30 mL, molar ratio of glucose to stearic acid 1∶1.2, w(catalyst) 2% , reaction time 1. 5 h, and reaction temperature 120-130℃. Under these conditions, the yield of glucose stearate is 92. 4%.
The results showed that the extraction rate of berberine hydrochloride was over 75% with the R oi of 1∶1.5 HCl concentrations in membrane of 0.8 mol/L,oleic acid carrier of 0.075 mol/L, and emulsifying agent Span-80 of 2.5%.
Glucose stearate was synthesized with TiGeW12O40/TiO2 as multiphase catalyst, glucose and stearic acid as reactants, 1,2-propylene glycol as solvent, sodium dodecyl sulfate as emulsifying agent, and the condition for microemulsifying the reaction system was studied.
The experiment results showed that the copolymerization can be proceeded fastly in low temperature, and the optimum reaction condition are as follows:the concentration of initiator is 3.1 mmol/L,the acrylic acid concentration is 2.6 mol/L,the reaction temperature is 30℃,the reaction time is 3 h,the emulsifying agent is 5%, the monomer conversion rate is 92.6%, grafting ratio is 43.2% and grafting efficiency is (56.4%.)
The experimental results showed that the grafting efficiency is preferable when the starch was dextrinized at 75℃ for 30 min, the weight ratio of starch to monomers is 1∶4, the preferred initiator content is 6. 0 mmol/L, the emulsifying agent content is 20. 8 mmol/L, the optimal reaction temperature is 53℃, and the optimal reaction time is 3. 5 h.
The optimum conditions were : m(initiators)∶m(total monomers)=0.4∶100.0, m(emulsifiers)∶m(total monomers)=2.2∶100.0, m(styrene)∶m(butyl acrylate)=1∶1 and the reaction temperature controling at 80～82℃.
The results showed that when the drink was added with0.10%mixed emulsifiers(3∶2mixtures of monog lyceride and sucrose fatty acid ester),0.20%PGA and CMC,0.10%xanthan g um,0.30%sodium polyphosphate,and homog enized at 30MPa,its stability was satisfactory.
A W/O microemulsion was prepared with Span80-PS (petroleum sulfonate) as complex emulsifier, isopropanol as cosurfactant and kerosene as oil phase.
Based on discussions on the nucleation mechanism of particles in the polymerization system, the influences of monomer weight added dropwise, and amounts of initiator and emulsifier on the size and distribution of PS particles were investigated.
PS nanoparticles with smaller diameter such as a number-average diameter of 18.7 nm and better monodispersity were obtained since the dropped styrene amount was suitable under 20wt-% emulsifier amount and 3wt-% initiator amount based on the monomer.
The shape-stabilized phase change materials (PCMs) composed of paraffin wax and silica were prepared in O/W emulsion with cetyl trimethylamine bromide as emulsifier and n-pentanol as assist emulsifier.
Decontaminating solutions that are used in the laboratory practice for the detoxication of hydrophilic process ME solutions are aqueous solutions of alkali hydroxide with additions of hydrogen peroxide and an emulsifier.
The kinetic parameters of radical copolymerization of butyl methacrylate and zinc-containing monomer were studied as influenced by the structure and concentration of various emulsifiers such as oxyalkylated alcohols and alkylphenols.
Calorimetric study of polyvinyl alcohols used as emulsifiers in suspension polymerization of vinyl chloride
The heat effects of dissolution of two pairs of polyvinyl alcohols used as emulsifiers in suspension polymerization of vinyl chloride and the optical transmission of their stirred aqueous solutions as a function of time were determined.
It is found that many factors such as emulsifiers, initiators, reaction temperature, pH value and polymerization technology have influences on the permormance of styrene-acrylate latex.
Microencapsulation of PANI with low pH as the core material was prepared by in situ polymerization of melamine-formaldehyde resins, as the shell material acts as an insulator between PANI particles, using two different emulsifiers.
Polymer beads with a diameter of 60-70 nm and specific functional groups were synthesized by a particular seeded emulsion polymerization technique.
Effects of relative content of HTPB and PPG on emulsion stability, resistance to water and ethanol, thermal stability, compatibility of soft and hard segment, as well as the mechanical property of the cured film were investigated.
Then, the cross-linked magnetic compsoite microspheres containing a carboxyl group were prepared by using an improved emulsion polymerization with divinylbenzene (DVB) as the cross-linking agent.
The results show that the composite microspheres were well dispersed in emulsion with uniform sizes and carboxyl groups on their surface.
Poly(vinyl chloride) composite emulsion resins modified by polyurethane