Fabrication and morphology control of hollow polymer particles by altering core particle size

Abstract

Particles with various morphologies were fabricated by changing the size of carboxyl-containing core particles and performing seeded emulsion polymerization as well as alkali posttreatment. The distribution of carboxyl groups, size, and morphology of the resultant particles were characterized with conductometric titration, dynamic light scattering (DLS), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). Results indicated that the size of carboxyl-containing core latex particles could be varied from 95 to 240 nm by adjusting the concentration of sodium dodecyl sulfate (SDS). The percentage of carboxyl groups buried inside particles increased clearly along with the encapsulation of core by interlayer and shell polymers, and seeded emulsion copolymerization performed smoothly except the system using core particles with size less than 99 nm. After alkali posttreatment, the morphologies of corresponding particles showed porous, hollow, and bowl-like structure, respectively. Moreover, the relationship between core particle size and alkali-treated particle morphology was elucidated briefly.

Facile route to synthesis and morphology control of anionic waterborne polyurethane hollow microspheres via self-crosslinking reaction

“…10,11 A variety of methods have been used for synthesis of the polymeric hollow microspheres, such as stepwise alkali-acid method, 12 template method, [13][14][15] self-assembly method, [16][17][18] precipitation polymerization and emulsion polymerization. [19][20][21][22][23] In order to obtain these unique properties, it is necessary to control their morphologies such as microsphere size, pore size and porosity. 19,24 Numerous reports have been devoted to synthesizing polymeric hollow microspheres with controllable morphology.…”

“…[19][20][21][22][23] In order to obtain these unique properties, it is necessary to control their morphologies such as microsphere size, pore size and porosity. 19,24 Numerous reports have been devoted to synthesizing polymeric hollow microspheres with controllable morphology. Deng et al 19 synthesized polymeric hollow particle by seeded emulsion polymerization, the morphology of particle controlled by changing the size of carboxyl-containing core particles.…”

“…19,24 Numerous reports have been devoted to synthesizing polymeric hollow microspheres with controllable morphology. Deng et al 19 synthesized polymeric hollow particle by seeded emulsion polymerization, the morphology of particle controlled by changing the size of carboxyl-containing core particles. Tavandashti et al 25 successfully prepared hollow polyaniline (PANI) structures with size controlled from nanotubes to microsphere by changing the synthesis conditions using a simple so template method.…”