Article
  • Synthesis and Properties of Self-healing Microcapsules Using Natural Gums as Surfactants
  • HyoWon Jun*,**,#, Boo Young Jeong**,#, Jungmi Cheon**, JiWon Hwang**, Won-Ki Lee*,† , and Jae Hwan Chun**,†

  • *Department of Polymer Engineering, Pukyoung National University, Busan 48547, Korea
    **Korea Institute of Footwear & Leather Technology, Busan 47154, Korea

  • 천연검을 계면활성제로 사용한 자기치유 마이크로캡슐의 합성 및 물성
  • 전효원*,**,# · 정부영**,# · 천정미** · 황지원** · 이원기*,† · 천제환**,†

  • *부경대학교 고분자공학과, **한국신발피혁연구원

Abstract

In this study, microcapsules were synthesized by using five types of natural gums as surfactants. The viscosity and emulsifier activity (E24) of the natural gum solutions used in the experiment were measured, and synthesized microcapsules were confirmed by optical microscopy (OM), field emission scanning electron microscope (FE-SEM), Fourier transform infrared spectrometry (FTIR), thermogravimetric analyses (TGA) and free-NCO content to have a spherical core–shell structure. In addition, microcapsules were applied to thermoplastic polyurethane (TPU) to prepare and evaluate coatings to confirm healing behavior. Natural gums affected the synthesis of microcapsules, such as viscosity and oil droplet size. Stable microcapsules were synthesized using tragacanth gum (TG) in amounts diluted to 1.0 wt% or less in water.


본 연구에서 5종의 천연검을 계면활성제로 사용한 계면중합을 이용해 폴리우레탄 마이크로캡슐을 합성하였다. 실험에 사용된 천연검 수용액의 점도와 유화활성력을 측정하였으며, 합성된 마이크로캡슐은 free-NCO content 및 FTIR을 측정하고 광학현미경, FE-SEM, TGA로 분석하여 구형의 코어-쉘 구조를 확인하였다. 또한 마이크로캡슐을 열가소성 폴리우레탄에 적용하여 코팅제를 제조하고 손상을 주어 치유거동을 확인하였으며, 손상 전후와 치유 후의 물성을 측정하여 치유효율을 평가하였다. 천연검은 점도 및 오일방울의 크기에 대한 변수로 작용하여 캡슐의 형태를 변화시켰으며, 1.0 g 이하의 트라가칸스검을 사용하였을 때 가장 안정한 형태를 나타냈다.


Keywords: natural gum, self-healing, microcapsule, thermoplastic polyurethane coating

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2018 Impact Factor : 0.500
  • Indexed in SCIE

This Article

  • 2020; 44(3): 325-333

    Published online May 25, 2020

  • 10.7317/pk.2020.44.3.325
  • Received on Jan 28, 2020
  • Revised on Mar 6, 2020
  • Accepted on Mar 10, 2020

Correspondence to

  • Won-Ki Lee*, and Jae Hwan Chun**
  • *Department of Polymer Engineering, Pukyoung National University, Busan 48547, Korea
    **Korea Institute of Footwear & Leather Technology, Busan 47154, Korea

  • E-mail: wonki@pknu.ac.kr, jhchun@kiflt.re.kr