본문 바로가기 주메뉴 바로가기
22대 대한민국 국회 국회정보길라잡이 국회의원검색
회원가입 로그인
HOME

정보검색

소장정보 검색

국회도서관 홈으로 정보검색 소장정보 검색

결과 내 검색

동의어 포함

고급검색

인명/단체명

저자정보 상세정보
인명/단체명을 입력하세요.

키워드

  • 대표어

  • 외국어

-

목차보기

Title Page 1

초록 4

Abstract 4

Contents 5

Chapter 1. Introduction 10

1.1. Overview of Polymer Nanocomposite 10

1.2. HDPE/Ceramic Nanocomposite Film 10

1.3. Critical Factors for Enhanced PCN Film 11

1.4. Motivation of Research 12

1.5. Electron Irradiation of Polymer 12

1.6. PCN Film with Enhanced Properties via Electron Irradiation 13

Chapter 2. Experimental 23

2.1. Boehmite NPs and silane coupling agents with alkyl chains 23

2.2. Materials 23

2.3. Surface treatment of boehmite NPs using SCA 23

2.4. Sample Preparation 24

2.5. Electron Irradiation 25

2.6. Characterization 25

Chapter 3. Results and Discussion 35

3.1. Effects of Surface Modification of NPs in PCN Films 35

3.1.1. Surface modification of NPs 35

3.1.2. Fabricated PCN Films 40

3.1.3. Properties of Pristine PCN Films 50

3.2. Effects of Electron Irradiation on the PCN Films 57

3.2.1. Structural Analysis of Irradiated PCN Films 57

3.2.2. Properties of Irradiated PCN Films 67

Chapter 4. Conclusion 75

Bibliography 76

Curriculum Vitae 82

List of Figures 7

Figure 1-1. Schematic of polymer nanocomposite 14

Figure 1-2. The process of mass production of PCN film 15

Figure 1-3. (a) Laminating process in the process of manufacturing finished products and (b) deformation because of insufficient winding 16

Figure 1-4. Issues caused by PCN films with weak thermal properties 17

Figure 1-5. Degradation of polymer nanocomposites by addition of unmodified inorganic particles 18

Figure 1-6. The role of binder and its effects 19

Figure 1-7. Previous researches of using binders and limitations 20

Figure 1-8. (a) Reactions induced by electron irradiation in polymer and (b) reaction yields occurred by electron irradiation depending on the type of polymer 21

Figure 1-9. Fabrication of PCN film via proposed electron irradiation process 22

Figure 2-1. Boehmite nanoparticle and silane coupling agent with alkyl groups 28

Figure 2-2. Process of silane treatment of boehmite nanoparticles 29

Figure 2-3. Fabrication process of PCN films 30

Figure 2-4. (a) Electron irradiation condition and (b) Monte Carlo simulation for uniform dose distribution of laminated samples 31

Figure 2-5. Measurements of mechanical properties 32

Figure 2-6. Measurements of thermal properties 33

Figure 2-7. Measurement equipment for characterization of PCN films 34

Figure 3.1-1. (a) Change of wettability by introducing ODS on B and (b) verification by dropping NPs on the water 37

Figure 3.1-2. (a) FTIR and (b) TGA results of B and B-ODS 38

Figure 3.1-3. (a) TEM and (b) SEM images of B and B-ODS 39

Figure 3.1-4. (a) Fabricated P, P/B, and P/B-ODS film and (b) TGA results of the films 43

Figure 3.1-5. Cross-sectional images of P/B and P/B-ODS film acquired by (a) SEM and (b) TEM 44

Figure 3.1-6. Size and distribution of nanofillers in P/B and P/B-ODS film from SEM images processed with Image J software 45

Figure 3.1-7. Haze analysis of P, P/B, and P/B-ODS film 46

Figure 3.1-8. (a) The structure of PE at 25 ℃ and 150 ℃ and (b) viscosity of P, P/B, and P/B-ODS according to shear rate at 150 ℃ 47

Figure 3.1-9. (a) DSC results of P, P/B, and P/B-ODS (b) crystallinity of P, P/B, and P/B-ODS 48

Figure 3.1-10. Schematic of P/B and P/B-ODS proposed in this study 49

Figure 3.1-11. (a) Stress-strain curve, (b) yield strength, and (c) elastic modulus o P, P/B, P/B-ODS 54

Figure 3.1-12. (a) Heat shrinkage, (b) TMA results, and (c) deformation point of P, P/B, P/B-ODS 55

Figure 3.1-13. (a) Thermal conductivity, and (b) its raw data at 100 ℃ of P, P/B, P/B-ODS 56

Figure 3.2-1. (a) EPR spectra, (b) gel contents, and (c) DMA results and calculated crosslink density of pristine and irradiated P/B and P/B-ODS 61

Figure 3.2-2. Cross-sectional SEM images of (a) P/B, (b) P/B-ODS, (c) irradiated P/B, and (d) irradiated P/B ODS 62

Figure 3.2-3. Cross-sectional SEM images after elimination of uncrosslinked region and EDS mapping of Al of (a) irradiated P/B and (b) irradiated P/B-ODS 63

Figure 3.2-4. (a) Al contents after elimination of uncrosslinked region in irradiated P/B and P/B-ODS and related schematic 64

Figure 3.2-5. FTIR spectra of pristine and irradiated P/B and P/B-ODS 65

Figure 3.2-6. Schematic of pristine and irradiated P/B and P/B-ODS proposed in this study 66

Figure 3.2-7. (a) Stress-strain curve, (b) yield strength, and (c) elastic modulus of P/B and P/B-ODS before and after electron irradiation with the pristine P as a control group 70

Figure 3.2-8. Tendency of crosslinking and chain scission in polymer according to increasing electron irradiation 71

Figure 3.2-9. (a) Heat shrinkage, (b) TMA results, and (c) melt integrity of irradiated P/B and P/B-ODS 72

Figure 3.2-10. Thermal conductivity of (a) P/B and (b) P/B-ODS before and after electron irradiation. (c) thermal conductivity of irradiated P/B and P/B-ODS with pristine P as a control group 73

Figure 3.2-11. Mechanism of thermal conductance in PCN films before and after electron irradiation 74

초록보기

 본 연구에서는 기계적, 열적 물성이 향상된 폴리에틸렌/보헤마이트 나노복합재 필름을 제작하는 접근법에 대해 살펴본다. 고밀도 폴리틸렌과 보헤마이트 나노입자를 포함하는 고분자 나노복합재 필름을 용융 혼련법으로 제조한 후, 전자빔을 조사한다. 보헤마이트 나노입자의 표면을 알킬 사슬을 함유하는 실란 커플링제로 처리하여, 실란 커플링제와 결합된 보헤마이트 나노입자의 표면이 알킬 사슬로 덮이도록 한다. 이로 인해, 폴리에틸렌 매트릭스 내의 표면처리된 보헤마이트 나노입자가 고도로 분산되며, 보헤마이트 나노입자 표면의 알킬 사슬과 폴리에틸렌 사슬의 얽힘이 발생해 복합재 필름의 비정질 영역이 강화된다. 전자빔 조사를 통해, 특히 얽힘이 발생한 부분에서 가교로 인한 공유결합이 형성되어 계면 결합력이 크게 강화되며, 폴리에틸렌 자체에서도 가교가 유발된다. 보헤마이트 나노입자의 실란 처리와 전자빔 조사에 의한 가교로 인한 시너지 효과는 나노복합재 필름 내에 견고한 네트워크 구조를 형성하며, 이로 인한 기계적, 열적 물성의 향상에 대해 논의된다.

추천서가 (다양한 추천 자료를 만나보세요)

권호기사보기

권호기사 목록 테이블로 기사명, 저자명, 페이지, 원문, 기사목차 순으로 되어있습니다.
기사명 저자명 페이지 원문 기사목차

권호

기사명 원문보기 기사목차
닫기