Kongzhuang Coal Mine, Shanghai Datun Energy Co. Ltd
College of Safety and Environmental Engineering, Shandong University of Science and Technology
Qingdao Haiwan Chemical Co. Ltd

防治煤自燃常用的酚醛泡沫存在韧性差、抗压强度低的问题。为了改善酚醛泡沫力学性能差的问题,本研究制备了三种无机增韧酚醛泡沫,研究了其发泡性能、力学性能、热稳定性。结果显示:纳米黏土增韧酚醛泡沫的固化时间提高,固化温度降低,而玻璃纤维和改性玻璃纤维增韧酚醛泡沫的固化温度变化较小;纳米黏土能够降低酚醛泡沫的发泡倍数,而玻璃纤维和改性玻璃纤维对其发泡倍数影响较小,增韧酚醛泡沫的收缩率降低;三种增韧剂均能改善酚醛泡沫的粉化率,其中纳米黏土的改善效果最佳;随着增韧剂添量的增大,酚醛泡沫的抗压强度先增大后稳定,当纳米黏土、玻璃纤维和改性玻璃纤维用量分别为6%、4%、4%时酚醛泡沫的抗压强度最大;玻璃纤维和纳米黏土增韧酚醛泡沫的热稳定性增加。

The phenolic foam commonly used to prevent spontaneous combustion of coal had the problems of poor toughness and low compressive strength. To improve the poor mechanical properties of phenolic foam, this study prepared three inorganic toughened phenolic foams and then investigated their foaming properties, mechanical properties, and thermal stability. The results showed that the curing time of nano-clay-toughened phenolic foam increased and the curing temperature decreased while the curing temperature of glass fiber and modified glass fiber- toughened phenolic foam changed less. Nano-clay could reduce the foaming multiplier of phenolic foam while glass fiber and modified glass fiber had less effect on the foaming multiplier, and the shrinkage of toughened phenolic foam was reduced. All the three toughening agents could improve the pulverization rate of phenolic foam, among which nano-clay had the best improvement effect. As the amounts of toughening agents were increased, the compressive strength of phenolic foam first increased and then stabilized. The compressive strength of phenolic foam was maximum when the amounts of nano-clay, glass fiber and modified glass fiber were 6%, 4% and 4% respectively. The thermal stability of glass fiber and nano-clay toughened phenolic foams increased.

“十三五”国家重点研发计划项目子课题(2018YFC0807900);国家自然科学基金项目(52274216)