Journal of Adhesion and Interface (접착 및 계면)

The Society of Adhesion and Interface, Korea (한국접착및계면학회)
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Preparation of Hydrophobic Antimicrobal Compounds Encapsulated Nanoparticles Using Alkoxysilane-functionalized Amphiphilic Polymer Precursor and Their Antimicrobial Properties

실란 기능화 양친성 고분자 전구체를 이용한 소수성 항균물질 담지 나노 입자 제조 및 항균 특성

  • Kim, Nahae (Department of Advanced Materials Engineering, Kangwon National University) ;
  • Kim, Juyoung (Department of Advanced Materials Engineering, Kangwon National University)
  • 김나혜 (강원대학교 기능소재공학과) ;
  • 김주영 (강원대학교 기능소재공학과)
  • Received : 2017.02.14
  • Accepted : 2017.03.02
  • Published : 2017.03.30
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Abstract

In this study, nanoparticles which encapsulated hydrophobic antimicrobial compounds with 50wt% of payload and 70%of solid content were prepared. These nanoparticles could be dispersed at water as well as various medium. Water dispersible organic-inorganic (O-I) hybrid nanoparticles were first prepared using alkoxysilane-functionalized amphiphilic polymer precursors through a conventional sol-gel process. Hydrophobic antimicrobial compound, Eugenol encapsulated nanoparticles were prepared using these O-I hybrid nanoparticles through a new nanoprecipitation process. The effect of various preparation on the size of nanoparticles, amount of payload, antimicrobial activity, and release rate of encapsulated compounds was investigated. All eugenol-encapsulated O-I nanoparticles regardless of preparation condition showed the same minimal inhibitory concentration (MIC) (50mg/ml) and 99% of antimicrobial activity for every strain. Their antimicrobial activity could maintain longer than two weeks. Especially, eugenol-encapsulated O-I nanoparticles prepared using tetraethoxysilane (TEOS) exhibited the highest payload (50wt%) and the lowest release rate which was owing to higher inorganic content in the O-I nanoparticles. And these O-I nanoparticles dispersed in hexanediol (HD) showed the highest antimicrobial activity and solid content (70wt%) because HD acted as a solvent as well as a antimicrobial agent.

본 연구에서는 50 wt%의 매우 높은 담지량과 70%의 높은 고형분을 가지면서도 물속이나 다양한 제품에 나노 입자 형태로 분산이 가능한 새로운 형태의 소수성 항균 물질 담지 나노 입자를 제조하였다. 실란 기능화 양친성 고분자 전구체(Alkoxysilane-functionalized Amphiphilic Polymer Precursor; 이하 AAPP)와 다양한 실란 화합물을 이용하여 전형적인 Hydrolytic Sol-Gel 공정으로 제조된 수분산 유-무기 하이브리드 나노 입자들을 제조하고, 이를 이용하여서 나노 침전법을 사용하여서 소수성 항균물질을 고함량으로 담지할 수 있는 새로운 공정으로 소수성 항균물질인 Eugenol이 담지된 유-무기 하이브리드 형태의 나노입자 제조하였다. 나노 입자 제조시 제조 조건의 변화에 따른 나노 입자들의 크기, 담지량, 항균 활성 및 방출거동 등에 영향을 미치는 인자들을 조사하였다. 나노 입자의 종류에 관계없이 Minimal Inhibitory Concentration (MIC)는 50 mg/ml로 동일하였고, 모든 균주에서 99 %에 해당하는 우수한 항균력과 Pseudomonas aeruginosa (PSE)를 제외하고는 2주 이상의 항균 지속력을 나타내었다. 특히, Tetraethoxysilane (TEOS)를 첨가한 경우에는 견고한 무기물 도메인으로 인해 가장 높은 담지량 (50 wt.%)과 서방출 (Sustained release)을 나타내었고, Hexanediol (HD)을 첨가한 경우에는 HD 자체의 항균력과 용매로서의 역할도 하였기 때문에 가장 높은 항균력과 70%의 고형분을 나타내었다.

Keywords

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