SHERP

Facile fabrication of polymer nanocapsules by microemulsion polymerization
마이크로에멀젼 중합을 이용한 폴리머 나노캡슐의 제조방법

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Authors
이건석
Advisor
장정식
Issue Date
2003
Publisher
서울대학교 대학원
Keywords
고분자 나노캡슐Polymer nanocapsules마이크로이멀젼 중합Microemulsion polymerization폴리스티렌Polystyrene폴리아크릴로니트릴Polyacrylonitrile분리Surfactant
Description
Thesis (master`s)--서울대학교 대학원 :응용화학부,2003.
Abstract
Polystyrene and polyacrylonitrile nanocapsules were obtained using
microemulsion polymerization and the diameters of hollow spheres were ca. 20
nm ~ 70 nm. The separation of polymer phase from the non-solvent phase lead
to hollow morphology of polymer and the size of polystyrene nanocapsules
could be controlled by using different surfactants spacers due to micellar
characteristics of surfactants. Surfactants used in microemulsion could be
removed by excess methanol and isooctane in a core part was dried at room
temperature. To investigate the components of the polymer materials at each
step, FT-IR and EDAX analysis were performed. The morphology and size
distribution of the nanospheres were measured by FE-SEM and TEM. From
these analysis and results, the following conclusions can be derived. The size
of polystyrene nanocapsules formed in this system decreases as the surfactant
with shorter hydrocarbon chain lengths is used. When a radical initiator, KPS is
used, The particle size for the SDS system is larger than DTAB system. Due to
the insolubility of polyacrylonitrile in the monomer, The shape of
polyacrylonitrile nanocapsules shows crumpled appearance.
Language
English
URI
http://dcollection.snu.ac.kr:80/jsp/common/DcLoOrgPer.jsp?sItemId=000000057817

http://hdl.handle.net/10371/68552
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Theses (Master's Degree_화학생물공학부)
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