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Preparation of waterborne dispersions of epoxy resin by the phase-inversion emulsification technique. 2. Theoretical consideration of the phase-inversion process
Yang, ZZ; Xu, YZ; Zhao, DL; Xu, M
2000-11-01
Source PublicationCOLLOID AND POLYMER SCIENCE
ISSN0303-402X
Volume278Issue:11Pages:1103-1108
AbstractA theoretical consideration of the phase-inversion technique to prepare waterborne particles based on the experimental facts of the phase inversion process given in part 1 of this series is presented. The deformation and breakup of the water droplets dispersed in an epoxy resin phase under shear action are analyzed in terms of microrheology. The interaction and coalescence dynamics among the water droplets stabilized by an interfacial layer formed by the emulsifier molecules are discussed in terms of Derjaguin-Landau-Verwey-Overbeek theory and effective collision theory, respectively. A criterion for the completion of phase-inversion is that the attraction among the water droplets exceeds the entropic repulsion. Thus, a physical model of phase-inversion is proposed to predict the effects of some control variables on the phase-inversion process as well as the structural features of the waterborne particles, by which the experimental results could be well interpreted. It is indicated that the achievement of phase inversion is determined by the dynamic coalescence among the water droplets before the phase-inversion point (PIP). If the dynamic coalescence among the water droplets is ignored, phase inversion is achieved completely and submicron-sized particles are prepared. In comparison, if the dynamic coalescence is significant, phase inversion is achieved incompletely and a large complex water-in-oil-in-water structure is prepared. In the case of complete phase inversion, it is shown that the size of the waterborne particles is comparable with the size of the water droplets before the PIP.
KeywordBisphenol a Epoxy Resin Waterborne Dispersions Phase-inversion Emulsification Physical Method Mechanism
Indexed BySCI
Language英语
WOS IDWOS:000165461000009
PublisherSPRINGER-VERLAG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/76016
Collection中国科学院化学研究所
Corresponding AuthorYang, ZZ
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Yang, ZZ,Xu, YZ,Zhao, DL,et al. Preparation of waterborne dispersions of epoxy resin by the phase-inversion emulsification technique. 2. Theoretical consideration of the phase-inversion process[J]. COLLOID AND POLYMER SCIENCE,2000,278(11):1103-1108.
APA Yang, ZZ,Xu, YZ,Zhao, DL,&Xu, M.(2000).Preparation of waterborne dispersions of epoxy resin by the phase-inversion emulsification technique. 2. Theoretical consideration of the phase-inversion process.COLLOID AND POLYMER SCIENCE,278(11),1103-1108.
MLA Yang, ZZ,et al."Preparation of waterborne dispersions of epoxy resin by the phase-inversion emulsification technique. 2. Theoretical consideration of the phase-inversion process".COLLOID AND POLYMER SCIENCE 278.11(2000):1103-1108.
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