Urchin-like carbon nanotubes grown on stainless steel particles: a promising reinforcement for composite materials
- 주제(키워드) carbon nanotube , composite
- 발행기관 고려대학교 대학원
- 지도교수 임대순
- 발행년도 2010
- 학위수여년월 2010. 2
- 학위구분 석사
- 학과 일반대학원 신소재공학과
- 원문페이지 81 p
- 실제URI http://www.dcollection.net/handler/korea/000000020974
- 본문언어 영어
- 제출원본 000045590611
초록/요약
In this study, a novel hybrid structure of carbon nanotubes grown on sub-micrometer sized spherical stainless steel particles was fabricated by a simple method. Spherical stainless steel particles with an average diameter of 100 nm were uniformly covered by a layer of multi-walled carbon nanotubes such that they resembled sea urchins. Micro structural observations by scanning electron microscopy and transmission electron microscopy revealed that the carbon nanotubes were densely deposited and adhered well on the stainless steel particles. Tensile strength was enhanced by the addition of these sea urchin-like carbon nanotubes/stainless steel particles through effective dispersion and good interfacial bonding to the polymer matrix.
more목차
Acknowledgement i
Abstract ii
List of Figures and Tables v
Chapter I - Introduction 1
1. Motivation for research 1
2. Thesis overview 2
Chapter II - Theoretical Background 4
1. Carbon nanotubes 4
1.1. Structure of carbon nanotubes 4
1.1.1. Single-walled carbon nantoubes 5
1.1.2. Multi-walled carbon nanotubes 10
1.2. Synthesis of carbon nanotubes 14
1.2.1. Arc-discharge 14
1.2.2. Chemical Vapor Deposition (CVD) 17
1.2.3. Laser ablation 20
1.3. Properties of carbon nanotubes 22
1.3.1. Mechanical properties 22
1.3.2. Electrical properties 24
1.4. Application of carbon nanotubes 30
2. Growth mechanism of carbon nanotubes by CVD process 32
Chapter III - Experimental Procedure 35
1. Materials 35
2. Surface treatment of stainless steel particles 35
3. Synthesis of carbon nanotubes 36
4. Fabrication of composites 36
5. Measure and Analyses 39
Chapter IV - Results and Discussion 40
1. Surface morphology of pretreated stainless steel particles 40
2. Effects of pretreatment and growth temperature on CNT diameters and their geometries on stainless steel particles 43
3. Urchin-like structure of CNTs grown on stainless steel particles 50
4. Possible applications of UL-CNTs/SS particles 55
5. Tensile strength of urchin-like CNTs/SS polymer composites 56
Chapter V - Conclusion 62
References 63
