Preparation And Heterocoagulation Of Multicomponent Latex Nanoparticles

The polymerization method has been chosen as the main preparation method and research interests for the laser printer color toner.This paper deals with the preparation of styrene-acrylic resin coated C.I.Pigment Blue 15:3(PB15:3)composite particles by in-situ emulsion polymerization,the preparation of styrene-acrylic resin coated polyethylene wax composite particles by in-situ emulsion polymerization,the preparation of styrene-acrylic resin coated C.I.Pigment Yellow 17(PY17)and charge control agent(CCA)multi-component composite particles by mini-emulsion polymerization and the preparation of micron-sized particles using the above nanoparticles by heterocoagulation method.The transmission electron microscope(TEM),nanoparticle size and potential analyzer,thermogravimetic analysis(TG),fourier transform infrared spectrometer(FTIR)and color-eye automatic differential colorimeter were used to characterize the size,morphology,component analysis and color properties of nano composite particles.The scanning electron microscope(SEM),laser particle analyzer and optical microscope were used to characterize the size,size distribution and morphology of micron-sized particles.The results of the study are as follows:In the section of "preparation of styrene-acrylic resin coated C.I.Pigment Blue 15:3(PB 15:3)composite particles by in-situ emulsion polymerization",the pigment dispersion is stable and the pigment particles is uniform when the milling time is 3h.When PB15:3 is 0.5g,monomer is 5.0g,TX-100 is 0.1g,SDS is 0.025g,the prepared particles are well dispersed and uniform.The shelf stability of encapsulated PB15:3 emulsion is much better than that of PB15:3 dispersion.Encapsulating PB15:3 does not destroy its tinctorial strength but protect it from UV irradiation.The nature and structure of PB 15:3 does not change after encapsulation,which can be concluded by XRD results.In the section of "preparation of styrene-acrylic resin coated PE wax composite particles by in-situ emulsion polymerization",the particle size becomes smaller and the shelf stability of the emulsion becomes better with the increasing of TX-100.When 4.0g St,1.0g n-BA,2.5g PE wax emulsion,O.lg KPS are determined,0.3g TX-100 and 0.075g SDS are the optimum emulsifier dosage to give the smallest particles and most stable emulsion.In the section of "preparation of styrene-acrylic resin coated PY17 and CCA multi-component composite particles by mini-emulsion polymerization",when the dosage of monomers,PY17,CCA and compound emulsifiers was 5g,0.4g,O.lg and 0.375 g,respectively,the emulsion obtained exhibited the best stability and the latex particles had a clear encapsulation structure with the best dispersity.Encapsulation of resin on the PY17 led to the decrease in yellow value b*but had little effect on its tinctorial strength and protect it from UV irradiation.In the section of "preparation of micron-sized particles using the above nanoparticles by heterocoagulation method",styrene-acrylic resin coated PE wax composite particles anionic emulsion prepared by 0.3g TX-100 and 0.075g SDS and styrene-acrylic resin coated PY17 and CCA multi-component composite particles cationic emulsion prepared by 0.2g TX-100 and 0.1g CTAB are the best combination.The flocculation efficiency and of these two emulsions is high and the flocculation rate is moderate.When the stirring speed is 700rpm,consolidation temperature is 54?-56?,consolidation time is 50min,heating rate is 0.2?-0.3?,curing temperature is 64?,curing time is 60min,the prepared particles have regular spherical morphology and particle size is about 10?m.These particles have compact structure and few holes on the surface of them.