ICCAS OpenIR
The mophological evolution of water droplets during incomplete phase inversion process
Zhu, Y; Yang, ZZ; Zhao, DL
2000-08-01
Source PublicationACTA POLYMERICA SINICA
ISSN1000-3304
Issue4Pages:514-517
AbstractPhase inversion emulsification technique is an effective physical method to prepare waterborne dispersions of polymeric resins, In this study, a multi-hollow epoxy resin sphere was obtained by incomplete phase inversion emulsification. The dynamic morphological evolution of water droplets dispersed in bisphenol. A epoxy resin/emulsifier (a multi-block copolymer) during phase inversion process was investigated with scanning electron microscopy. It is shown that small discrete water droplets are dispersed in the epoxy resin continuous phase at low water content. In this case, the dynamic coalescence among the small water droplets is ignored. With increasing water content, the dynamic coalescence becomes remarkable and larger water drops are formed by the coalescence among the small water droplets. The larger water drops are randomly distributed within the continuous phase. Meanwhile, some necklace like structures with varied length co-exist with the small water droplets and larger water drops. Incomplete phase inversion is achieved through the coalescence among the larger water drops, and some small water droplets are entrapped therein, In this case, a kind of multi-hollow sphere is obtained. While, in some local regions, all the nearest small water droplets coalesce simultaneously to be continuous phase to achieve complete phase inversion, and small discrete waterborne particles are obtained. The dynamic coalescence among the small water droplets dispersed in epoxy resin continuous phase could be analyzed in terms of the improved Smoluchowski equation.
KeywordIncomplete Phase Inversion Dispersed Phase Morphological Evolution Dynamic Coalescence
Indexed BySCI
Language英语
WOS IDWOS:000089003100028
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/75912
Collection中国科学院化学研究所
Corresponding AuthorZhu, Y
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, Polymer Phys Lab, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Y,Yang, ZZ,Zhao, DL. The mophological evolution of water droplets during incomplete phase inversion process[J]. ACTA POLYMERICA SINICA,2000(4):514-517.
APA Zhu, Y,Yang, ZZ,&Zhao, DL.(2000).The mophological evolution of water droplets during incomplete phase inversion process.ACTA POLYMERICA SINICA(4),514-517.
MLA Zhu, Y,et al."The mophological evolution of water droplets during incomplete phase inversion process".ACTA POLYMERICA SINICA .4(2000):514-517.
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