木质素磺酸盐/再生聚氨酯泡沫网络型聚氨酯泡沫材料的制备与胞体结构特性

Preparation and Cell Body Structure Property of Reticulated Polyurethane Foam Composites from Ligninsulfonate/Renewable Polyurethane Foam

研究了不同醇解剂(乙二醇和一缩乙二醇)以及乙二醇用量对再生聚氨酯泡沫(PUF)的影响。结果显示乙二醇比一缩乙二醇有更好的醇解性能,而且随着乙二醇用量的增加,再生PUF的黏度值减小。用木质素磺酸盐(LS)和再生PUF制备网络型PUF材料,并对其微观结构、导热系数和压缩性能进行了表征。结果显示,LS/再生PUF网络型PUF材料导热系数随着再生PUF量的增加呈上升趋势,原因是随着再生PUF量的增加,胞体中薄膜的开孔率提高,降低了材料的保温性能。压缩强度(σ10)在38.4～544 kPa之间,扫描电镜(SEM)图显示再生PUF量的增加影响了胞体骨架厚度和胞体结构。

The impacts of alcoholysis reagent （glycol add diethylene glycol） and glycol on renewable polyurethane foam （PUF） were studied. The results showed that the alcoholysis performance of glycol is better than that of diethylene glycol and viscosity of renewable PUF decreased with increase of glycol dose. Reticulated polyurethane foam composite was prepared by lignosulphanate （LS） and renewable PUF. Its microstructure, thermal conductivity as well as compressive property were studied. The thermal conductivity of the polyurethane foam composite was going up with the increased dosage of renewable PUF, which is attributed to the increase of hole-opening rate of film cell bodies with the increase of renewable PUF, so that its thermal insulating properties decreased. Compressive strength （σ10） was from 38.4 to 544 kPa. The results of scanning electron microscopy （SEM） showed that the increased dosage of renewable PUF had a great effect on the thickness of cell body skeleton and cell body structure.