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Microencapsulation of oil with poly(styrene-N,N-dimethylaminoethyl methacrylate) by SPG emulsification technique: Effects of conversion and composition of oil phase
Alternative TitleJ. Colloid Interface Sci.
Ma, GH; Su, ZG; Omi, S; Sundberg, D; Stubbs, J
2003-10-15
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume266Issue:2Pages:282-294
AbstractMicrocapsules with narrow size distribution, in which hexadecane (HD) was used as a oily core and poly(styrene-co-NN-dimethylamino-ethyl methacrylate) [P(St-DMAEMA)] as a wall, were prepared by a Shirasu porous glass (SPG) emulsification technique and a subsequent suspension polymerization process. That is, a mixture of St monomer, DMAEMA monomer, HD, and NN'-azobis(2,4-dimethylvaleronitrile) initiator was permeated through the uniform pores of an SPG membrane into a continuous phase containing a poly(vinylpyrrolidone), sodium lauryl sulfate, and sodium nitrite water-soluble inhibitor by applying a pressure, to form uniform droplets. Then, the droplets were polymerized at 70 degreesC. It was found that HD was encapsulated completely only when conversion was quite high, irrespective of whether a DMAEMA hydrophilic monomer was incorporated into the polymer. As the amount of HD increased, HD was more easily encapsulated by the polymer. In order to clarify the reason for such unique behavior, a simulation was carried out, taking the St monomer partition in the HD phase and PSt wall phase into the consideration. It was found that the main reason HD could not be encapsulated completely by PSt when conversion was lower was that the interfacial tension of the HD phase with water and the PSt phase with water got closer. As a result, both HD and PSt can come in contact with the water phase. (C) 2003 Elsevier Inc. All rights reserved.; Microcapsules with narrow size distribution, in which hexadecane (HD) was used as a oily core and poly(styrene-co-NN-dimethylamino-ethyl methacrylate) [P(St-DMAEMA)] as a wall, were prepared by a Shirasu porous glass (SPG) emulsification technique and a subsequent suspension polymerization process. That is, a mixture of St monomer, DMAEMA monomer, HD, and NN'-azobis(2,4-dimethylvaleronitrile) initiator was permeated through the uniform pores of an SPG membrane into a continuous phase containing a poly(vinylpyrrolidone), sodium lauryl sulfate, and sodium nitrite water-soluble inhibitor by applying a pressure, to form uniform droplets. Then, the droplets were polymerized at 70 degreesC. It was found that HD was encapsulated completely only when conversion was quite high, irrespective of whether a DMAEMA hydrophilic monomer was incorporated into the polymer. As the amount of HD increased, HD was more easily encapsulated by the polymer. In order to clarify the reason for such unique behavior, a simulation was carried out, taking the St monomer partition in the HD phase and PSt wall phase into the consideration. It was found that the main reason HD could not be encapsulated completely by PSt when conversion was lower was that the interfacial tension of the HD phase with water and the PSt phase with water got closer. As a result, both HD and PSt can come in contact with the water phase. (C) 2003 Elsevier Inc. All rights reserved.
KeywordShirasu Porous Glass Emulsification Narrow Size Distribution Polystyrene Microencapsulation Suspension Polymerization Hexadecane n N-dimethylaminoethyl Methacrylate
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/S0021-9797(03)00692-1
URL查看原文
Indexed BySCI
Language英语
WOS KeywordMORPHOLOGY DEVELOPMENT ; MICROSPHERES ; MICROCAPSULES ; PARTICLES
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000185782400008
Citation statistics
Cited Times:51[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5310
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100080, Peoples R China
2.Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Tokyo 1848588, Japan
3.Univ New Hampshire, Dept Chem Engn, Polymer Res Grp, Durham, NH 03824 USA
Recommended Citation
GB/T 7714
Ma, GH,Su, ZG,Omi, S,et al. Microencapsulation of oil with poly(styrene-N,N-dimethylaminoethyl methacrylate) by SPG emulsification technique: Effects of conversion and composition of oil phase[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2003,266(2):282-294.
APA Ma, GH,Su, ZG,Omi, S,Sundberg, D,&Stubbs, J.(2003).Microencapsulation of oil with poly(styrene-N,N-dimethylaminoethyl methacrylate) by SPG emulsification technique: Effects of conversion and composition of oil phase.JOURNAL OF COLLOID AND INTERFACE SCIENCE,266(2),282-294.
MLA Ma, GH,et al."Microencapsulation of oil with poly(styrene-N,N-dimethylaminoethyl methacrylate) by SPG emulsification technique: Effects of conversion and composition of oil phase".JOURNAL OF COLLOID AND INTERFACE SCIENCE 266.2(2003):282-294.
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