화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.42, No.1, 147-156, January, 2018
DOI10.7317/pk.2018.42.1.147  Export Citation
아미노기를 도입한 Microcrystalline Cellulose(MCC)를 충전제로 사용한 PU 복합체 제조 및 물성 연구
Preparation and Characterization of Polyurethane Composites Using Amino-functionalized Microcrystalline Cellulose (MCC) as Fillers
양여경, 김한나, 임광희1, 하기룡†
  • 계명대학교 공과대학 화학공학과
  • 1대구대학교 공과대학 화학공학과
Yeokyung Yang, Hanna Kim, Kwang-Hee Lim1, and KiRyong Ha†
  • Department of Chemical Engineering, Keimyung University, Daegu 42601, Korea
  • 1Department of Chemical Engineering, Daegu University, Gyeongsangbuk-do 38453, Korea
E-mail:
초록
본 연구에서는 생분해성인 미세결정셀룰로오스(MCC) 분말 표면을 3-aminopropyltriethoxysilane(APS)를 사용 하여 실란화 반응으로 표면에 -NH2기를 도입하였다. 개질된 MCC(MCC-APS)를 충전제로 사용하여, poly(tetrahydrofuran) (PTHF, Mw= ~1000 g/mol)에 투입하여 분산시킨 후, 4,4'-methylenebis(phenyl isocyanate)(MDI) 와 반응시켜 prepolymer를 제조하고, 사슬 연장제인 1,4-butanediol(1,4-BD)와 반응시켜 폴리우레탄(PU) 복합체를 제조하였다. MCC-APS 충전제가 PU의 열적 및 기계적 물성에 미치는 영향은 열 중량 분석기(TGA), 만능재료시험기(UTM) 및 동적기계적분석기(DMA)로 각각 분석하였다. 또한 충전제와 PU 매트릭스 계면에서의 결합 상태는 주사전자현미경(SEM)을 사용하여 측정하였다. MCC-APS 충전제의 함량이 증가함에 따라, PU 복합체의 탄성률은 크게 증가하고, 파단연신율은 크게 감소하였다. 이는 MCC-APS 충전제와 PU 매트릭스 계면에서 강한 우레아 결합 생성 때문으로 판단된다.
In this study, the surface of biodegradable microcrystalline cellulose (MCC) powder was modified with 3-aminopropyltriethoxysilane (APS) to introduce -NH2 functional groups on the surface by silanization. After mixing APS modified MCC (MCC-APS) powders in poly(tetrahydrofuran) (PTHF, Mw= ~1000 g/mol), they were reacted with 4,4'- methylenebis(phenyl isocyanate) (MDI) to make prepolymers, and chain-extended with 1,4-butanediol (1,4-BD) to prepare polyurethane (PU) composites. The effect of MCC-APS fillers on various properties of PU composites were studied using thermogravimetric analyzer (TGA), universal testing machine (UTM) and dynamic mechanical analyzer (DMA). The interfacial binding between MCC-APS and PU matrix was characterized by scanning electron microscope (SEM). We observed significant increase in tensile moduli and significant decrease in elasticity with increasing MCC-APS contents in PU composites, due to the strong urea bond formation at the interface between the MCC-APS and the PU matrix.
Keywords:microcrystalline cellulose;(3-aminopropyl)triethoxysilane;polyurethane;mechanical property;interface
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