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논문 기본 정보

자료유형
학위논문
저자정보

서민지 (부산대학교, 부산대학교 대학원)

지도교수
허필호
발행연도
2023
저작권
부산대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (2)

초록· 키워드

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Waterborne polyurethane (WPU) is an eco-friendly material based on water rather than organic solvents. In this study, various WPU series were synthesized by Polycaprolactone diol (PCL) and 4,4’-Methylene dicyclohexyl diisocyanate (H12MDI) as main domains of urethane, Dimethylol butanoic acid (DMBA) as anionic internal emulsifier and Trimethylamine (TEA) as neutralizer. In addition, Caster oil was additionally added to confirm the change in physical properties of WPU according to the absence or presence of Caster oil and molecular weight, and biodegradability was evaluated using enzyme degradable test. WPU, which is adhesive strength increases as the molecular weight increases, had cross-linked structure by Caster oil. As a result, mechanical properties were improved, and biodegradability evaluation using enzymes was also successfully performed. The biodegradability evaluation using the enzyme was confirmed by FE-SEM. WPU made through the above experiment has excellent physical properties and is biodegradable by enzymes. Therefore, the WPU synthesized in this experiment can be considered as a promising candidate for the development of future eco-friendly polyurethane materials and the eco-friendly adhesive industry.

목차

1. Introduction 1
1.1. Introduction 2
2. Theoretical background 4
2.1. Polyurethane 5
2.2. Waterborne Polyurethane 6
2.2.1. Polyol 8
2.2.2. Biopolyol 8
2.2.3. Isocyanate 10
2.2.4. Ionic group 11
2.2.5. Polyurethane dispersion methods 12
2.3. Adhesive 13
2.3.1. Adhesive strength 13
2.3.2. Polyurethane Adhesive 16
3. Experimental 18
3.1. Materials 19
3.2. Characterizations 19
3.3. Synthesis of WPU series with or without castor oil 20
3.4. Enzyme degradable Test 25
4. Results and discussion 26
4.1. Design and synthesis of WPU 27
4.2. Mechanical properties of WPU 31
4.3. Adhesive properties of WPU 34
4.4. Thermal properties of WPU 37
4.5. Enzymatic degradation of WPU 41
5. Conclusion 46
6. References 48

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