Synthesis and characterization of cardanol based epoxy dimers and their application to epoxy coatings
- 주제(키워드) Epoxy , Cardanol , Coatings
- 주제(DDC) 547
- 발행기관 아주대학교
- 지도교수 김상욱
- 발행년도 2023
- 학위수여년월 2023. 8
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000032969
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Epoxy resin is mainly used in marine and heavy-duty coating applications to protect materials because of its excellent adhesion to substrates. The marine and heavy-duty coating market aims to reduce solvent usage and produce high-solids and solvent-free coating formulations, to comply with volatile organic content regulations. Accordingly, the demand for a new epoxy diluent without decreasing its coating properties as well as a low-viscosity epoxy resin is increasing. In addition, the demand for bio-based materials is increasing as sustainability have gained attention. According to these trends, a new epoxy diluent using high-purity cardanol obtained from cashew nut shell liquid was studied. In this study, the curing properties of the the dimer structures of Cardanol Novolac resin using cardanol were predicted through DFT calculations and molecular modeling. A novolac dimer of epoxy was synthesized using high-purity cardanol and analyzed using Fourier transform-infrared spectroscopy, nuclear magnetic resonance, and gel permeation chromatography. The coating properties were predicted based on the cured properties using differential scanning calorimetry and rheometric studies. In addition, the commercial applicability of the synthetic material was examined by analyzing its coating application properties. The di-functional epoxy diluent produced using high-purity cardanol can be used for marine and protective coating applications. This product showed strong potential for commercial applications because of its high dilution effect and improved coating properties, such as impact resistance and chemical resistance, by increasing the cross-linking density of coatings based on its di-functional structure. In addition, the use of bio-based materials is advantageous for commercial use of this material. So, this research is expected to facilitate the propagation of eco-friendly constituents within the realm of epoxy coatings. The formulation of a novel diluent through this study holds the potential to proffer more sustainable and environmentally benign resolutions within the ambit of the coating industry.
more목차
1. Introduction 1
2. Experimental Section 5
3. Results and Discussion 10
4. Conclusion 16
5. References 29
