Fabrication of highly spherical millimeter-sized poly(amic acid) capsules by removing non-volatile solvent

Authors
Nagai, K Takaki, T Norimatsu, T Yamanaka, T
Citation
K. Nagai et al., Fabrication of highly spherical millimeter-sized poly(amic acid) capsules by removing non-volatile solvent, MACRO RAPID, 22(16), 2001, pp. 1344-1347
Citations number
26
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
MACROMOLECULAR RAPID COMMUNICATIONS
ISSN journal
10221336 → ACNP
Volume
22
Issue
16
Year of publication
2001
Pages
1344 - 1347
Database
ISI
SICI code
1022-1336(20011107)22:16<1344:FOHSMP>2.0.ZU;2-2
Abstract
Millimeter-sized highly spherical poly(amic acid) (PAA) capsules were prepa red by curing an emulsion containing non-volatile N,N-dimethylacetamide (DM Ac). Although the sphericity of the capsules (> 99%) obtained by the emulsi on method was slightly lower than that of corresponding polystyrene capsule s, their surface was smooth. The curing conditions to achieve the highest d egree of sphericity require stabilization and deformation, which were gover ned by parameters, such as PAA concentration, the viscosity of the emulsion matrix, stirring speed, and temperature.