Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Synthesis of Size Controllable Amine-Functionalized Silica Nanoparticles Based on Biomimetic Polyamine Complex

생체 모방 폴리아민 복합체 기반의 크기 조절이 가능한 아민 기능화 실리카 나노입자의 합성

  • Kim, Dong-Yeong (Department of Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Kim, Jae Seong (Department of Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Lee, Chang-Soo (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
  • 김동영 (충남대학교 공과대학 응용화학공학과) ;
  • 김재성 (충남대학교 공과대학 응용화학공학과) ;
  • 이창수 (충남대학교 공과대학 응용화학공학과)
  • Received : 2022.02.11
  • Accepted : 2022.02.28
  • Published : 2022.08.01
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Abstract

This study demonstrates a method for synthesis of amine functionalized and easily size controllable silica nanoparticles through biomimetic polyamine complex. First, we generate a polyamine nanocomplex composed of polyallylamine hydrochloride (PAH) and phosphate ion (pi) to synthesize silica nanoparticles. The size of polyamine nanocomplex is reversibly adjusted within the range of about 50 to 300 nm according to the pH conditions. Amine groups of the PAH in the nanocomplex catalyzes the condensation reaction of silicic acid. As a results, silica nanoparticles are synthesized based on nanocomplex in a very short time. Finally, we synthesize silica nanoparticles with various sizes according to the pH conditions. In the process of synthesizing silica nanoparticles, polyamine chains that act as catalysts are incorporated into the inside and surface of the particles, subsequently, amine groups are exposed on the surface of silica nanoparticles. As a results, the synthesis and surface modification of silica nanoparticles are performed simultaneously, and the silica nanoparticles introduced with amine groups can be easily synthesized by adjusting the sizes of the silica nanoparticles. Finally, we demonstrate the synthesis of functional silica nanoparticles in a short time under milder conditions than the conventional synthetic method. Furthermore, this method can be applicable to bioengineering and materials fields.

본 연구는 생체 모방 폴리아민 복합체를 통해 아민 그룹(amine group)이 기능화 되고 크기 조절이 간편한 실리카 나노입자의 합성 방법에 관한 것이다. 먼저, 실리카 나노입자를 합성하기 위한 촉매로써 polyallylamine hydrochloride(PAH)와 인산 이온(phosphate ion)으로 구성된 폴리아민 나노 복합체를 형성하였다. 복합체의 크기는 pH 조건에 따라 가역적인 조절이 가능하다. 나노 복합체에 존재하는 PAH 주쇄의 다량의 아민 그룹들은 silicic acid의 축합(condensation) 반응을 촉매 하며, 결과적으로 실리카 나노입자를 매우 빠른 시간 내에 합성할 수 있다. 최종적으로 pH 조건에 따라 다양한 크기를 갖는 실리카 나노 입자를 합성하였다. 실리카 나노입자의 합성 과정에서 촉매 역할을 하는 PAH는 나노입자의 내부 및 표면에 함입되고 합성된 실리카 나노입자의 표면에 아민 그룹이 노출된다. 본 방법은 실리카 나노입자의 합성과 표면개질이 동시에 이루어지며, 아민 그룹이 도입된 실리카 나노입자를 다양한 크기로 조절하여 손쉽게 합성할 수 있다. 최종적으로, 본 연구에서 제시한 방법은 기존의 합성법 보다 온화한 조건 하에서 단시간 내에 실리카 나노입자를 합성할 수 있으며, 생체 공학 및 재료 분야에서 적용되어 넓게 활용될 수 있다.

Keywords

Acknowledgement

이 논문은 충남대학교 학술연구비에 지원을 받아 수행된 연구로 이에 감사드립니다.

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