Development of Graphene/Boron Nitride/Thermoplastic Polyurethane Composite Films for Adjustable-Cooling Smart Clothes

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研究生：	宋語謙 Yu-Chian Soong
論文名稱：	Development of Graphene/Boron Nitride/Thermoplastic Polyurethane Composite Films for Adjustable-Cooling Smart Clothes Development of Graphene/Boron Nitride/Thermoplastic Polyurethane Composite Films for Adjustable-Cooling Smart Clothes
指導教授：	邱智瑋 Chih-Wei Chiu
口試委員:	邱顯堂 Hsien-Tang Chiu 鄭智嘉 Chih-Chia Cheng
學位類別：	碩士 Master
系所名稱：	工程學院 - 材料科學與工程系 Department of Materials Science and Engineering
論文出版年：	2021
畢業學年度：	109
語文別：	英文
論文頁數：	76
中文關鍵詞：	聚合物複合材料、石墨烯、氮化硼
外文關鍵詞：	polymer composites, graphene, boron nitride
相關次數：	點閱：270 下載：0
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上一筆

全球暖化造成氣候變遷、乾旱現象、沙漠化，讓人們生活的環境變得越來越熱，而能源與原物料變得越來越稀少，為了解決這些問題，各種節能減碳的研究一直被科學家長期關注。其中，熱界面材料和個人熱管理系統可以有效降低調節溫度所產生的能源耗損。然而，熱界面材料應用目前大部分局限於電子元件，個人熱管理系統只能產生微乎其微的降溫效果，因此開發出一種能夠結合高導熱與實用性的多功能材料顯得非常重要。
本文進行了兩項不同的研究，以設計、製造與鑑定來開發出含有高導熱填充物(如石墨烯與氮化硼)的多功能複合薄膜。在第一項研究中，我們將石墨烯、氮化硼與熱塑性聚氨酯结合，製造成具有多層結構的BN-GNP/TPU複合薄膜。而在第二項研究中，我們分別將表面改質的氮化硼與石墨烯利用分散劑SMAEF80-D2000均勻分散，使其具有良好的分散性，再將分散後的液體與熱塑性聚氨酯均勻混和，從而制造出具有雜化結構的BNOH/GNP/TPU複合薄膜。
所有的研究都是利用簡單製程與極低的添加量來製造多功能複合薄膜，並根據薄膜的導熱性、物理特性與實際應用進行鑑定。我們最後成功將熱界面材料的概念應用在個人熱管理系統上，創造出新一代的多功能熱界面材料。

Due to global climate change, multifunctional materials with energy-saving properties are receiving increased attention. Thermal interface materials and personal thermal management can be used to reduce energy consumption in regulating temperature. However, thermal interface materials are limited to electronic components and personal thermal management only has a small cooling effect. In order to improve these properties, multifunctional materials with excellent thermal conductivity and practical properties are becoming highly important.
For this thesis, two different studies were conducted to design, fabricate, and characterize multifunctional polymer-based composite films with high thermal conductive fillers, such as graphene and boron nitride. In the first study, a TPU matrix was combined with BN and GNP fillers having a layered structure to fabricate BN-GNP/TPU composite films. In the second study, modified BN and GNP were combined with an organic dispersant SMAEF80-D2000 for them to be well dispersed. They were mixed with the TPU matrix to fabricate BNOH/GNP/TPU composite films with a hybrid structure.
These composite films were fabricated via a facile operation process and a low filler loading. They were characterized based on their physical, thermal, and practical application properties. They were formed to prove that the idea of thermal interface materials can be applied to personal thermal management, and a new generation of multifunctional thermal interface materials can be created.

Abstract...............................................I
Chinese Abstract.......................................II
Acknowledgment.........................................III
Table of Contents......................................IV
List of Figures........................................VII
List of Tables.........................................X
Chapter 1 Introduction.................................1
1 Background.........................................1
2 Objectives.........................................2
3 Thesis Organization................................2
Chapter 2 Literature Review............................3
1 Thermal Conduction Properties......................3
1.1 Definition of Thermal Conduction.................3
1.2 Theoretical mechanism in crystalline.............4
1.3 Theoretical mechanism in polymers................5
1.4 Theoretical mechanism in composites..............6
2.5 Dispersion State Affected Thermal Conductivity...7
2 High Thermal Conduction Materials..................8
2.1 Graphene.........................................8
2.2 Boron Nitride....................................9
3 Relative Work......................................10
3.1 Graphene Polymer Composite Materials.............10
3.2 Boron Nitride Polymer Composite Materials........11
3.3 Laminated/Layered Composite Materials............12
3.4 Hybrid Composite Materials.......................13
4 State of Arts......................................15
4.1 Thermal Interface Materials......................15
4.2 Cooling Garments.................................16
Chapter 3 Experiment Section...........................18
1 Materials..........................................18
2 Experiment Apparatus...............................19
3 Experiment Flow Chart..............................20
4 Characterization Techniques........................21
4.1 Field Emission Scanning Electron Microscopy......21
4.2 Transmission Electron Microscopy.................21
4.3 Hot Disk.........................................21
4.4 Tensile Tests....................................21
4.5 Fatigue Tests....................................22
4.6 UV-Vis Absorption Spectroscopy...................22
4.7 Fourier-Transform Infrared Spectroscopy..........22
4.8 X-Ray Photoelectron Spectroscopy.................22
4.9 Surface Wettability..............................23
4.10 Washing Tests...................................23
4.11 The Cooling Performance.........................23
Chapter 4 Multilayered Graphene/Boron Nitride/Thermoplastic Polyurethane Composite Films with High Thermal Conductivity, Stretchability, and Washability for Adjustable-Cooling Smart Clothes.......................25
1 Introduction.......................................25
2 Experimental.......................................26
2.1 Materials........................................26
2.2 Sample Preparation...............................26
3 Sample Characterization............................27
3.1 Formation Mechanism..............................27
3.2 Morphologies.....................................28
4 Results and Discussion.............................30
4.1 Thermal Properties...............................30
4.2 Physical Properties..............................31
4.3 Contact Angle....................................33
4.4 Washing Test.....................................34
4.5 The Cooling Performance..........................35
5 Summary............................................41
Chapter 5 Boron Nitride/Graphene/Thermoplastic Polyurethane Multifunctional Hybrid Films with High Thermal Conductivity, Washability, and Stretchability for Wearable Cooling Smart Clothes..................................42
1 Introduction.......................................42
2 Methods............................................43
2.1. Materials.......................................43
2.2. Surface modification of BN by NaOH..............44
2.3. Synthesis of the Dispersing Agent SMAEF80-D2000.45
2.4. Preparation of Dispersed BNOH/GNP/TPU hybrids...45
3. RESULTS AND DISCUSSION............................46
3.1. Analysis of Modified BN Particles...............46
3.2. Analysis of Dispersing Agent SMAEF80-D2000......48
3.3. Synthesis and Structural Analysis of the Composite Films.52
3.4. Improved Properties of Composites...............54
3.5. The Cooling Performance Measurement.............60
4. Summary...........................................65
Chapter 6 Conclusions..................................66
References.............................................68


                                

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