广州化学2024，Vol.49Issue(6)：46-52,7.DOI:10.16560/j.cnki.gzhx.20240603
基于受阻脲键自修复聚氨酯的制备及性能
Preparation and Properties of Self-healing Polyurethane Based on Blocked Urea Bond
施敏 1梁利岩 2刘家铭 3秦静静 4王定松5
作者信息
- 1. 中国科学院广州化学研究所,广东 广州 510650
- 2. 中国科学院大学,北京 100049
- 3. 中国科学院新型特种精细化学品工程实验室,广东 广州 510650
- 4. 国科广化韶关新材料研究院,广东 南雄 512400
- 5. 国科广化精细化工孵化器(南雄)有限公司,广东 南雄 512400
- 折叠
摘要
Abstract
In this paper,a kind of hindered urea bonding curing agent,HUG,was synthesized using toluene-diisocyanate(TDI)and trans-N,N-diaminocyclohexylenediamine.The agent was then used in the polyurethane network structure formed by hydrogenated castor oil and TDI.The resulting polyurethane exhibited good self-healing properties.The polyurethane samples were characterized using nuclear magnetic resonance hydrogen spectroscopy(NMR)and Fourier infrared(IR)to confirm the successful introduction of the hindered urea bond and the preparation of the polyurethane.The thermal stability of the samples was tested using differential scanning calorimetry(DSC),thermomechanical analysis(DMA),and thermogravimetric analysis(TGA).The self-healing effect of the sample strips was tested using scratch self-healing test and the hot compression welding test.Additionally,the stability of the sample strips against chemical reagents was tested through a dissolution test.The study demonstrates that the polyurethane can achieve self-healing within 1 h at 60℃.Moreover,it exhibits greater resistance to commonly used chemical solvents and possesses a good shape memory property.These findings suggest a new direction for the preparation of self-healing polyurethanes.关键词
自修复/受阻脲键/聚氨酯/形状记忆/生物基Key words
self-healing/hindered urea bond/polyurethane/shape-memory/bio-based分类
化学化工引用本文复制引用
施敏,梁利岩,刘家铭,秦静静,王定松..基于受阻脲键自修复聚氨酯的制备及性能[J].广州化学,2024,49(6):46-52,7.
