摘要
在全水一步法制备聚氨酯软泡过程中加入不同填充量的高潜热值相变材料正十八烷,制备相变潜热较高的调温聚氨酯发泡棉。通过扫描电镜(SEM)、傅里叶红外光谱(FTIR)、示差扫描量热(DSC)、热重(TG)等表征手段和力学测试,研究不同含量的正十八烷对发泡棉表面形貌、化学结构、热性能和力学性能的影响。SEM和FTIR结果显示:相变材料正十八烷能较好的埋置于聚氨酯基体中;DSC和TG结果显示:发泡棉的相变热值随正十八烷含量的增加而增大,含有20%正十八烷的发泡棉相变潜热可达43J/g;经多次热处理后发现:填充20%正十八烷的复合发泡棉相变潜热变化量较小,热稳定性良好;力学测试结果显示:经正十八烷填充后的聚氨酯发泡棉永久压缩形变增大,拉伸强度及断裂伸长率减少。
The temperature-controlled polyurethane foamed cotton with high phase change latent heat was prepared by filling various dosage of the phase change material of n-octadecane with high latent heat value during preparation of polyurethane soft foam with one-step water method.SEM,FTIR,DSC,TG and the related mechanical tests were applied to investigate the effects of different dosage of n-octadecane on the surface morphology,chemical structure,thermal property,and mechanical property of the foamed cotton.The main results were as follows:SEM and FTIR show that n-octadecane might be well embedded in polyurethane matrix.DSC and TG show that the phase change heat of the foamed cotton increases with the dosage of n-octadecane and the phase heat value of the foamed cotton with 20% of n-octadecane can reach 43 J/g.In addition,after heat treatment for several times,phase heat value of the foamed cotton with 20%of n-octadecane changes little,and the heat stability is good.The mechanical test results showed that the permanent compression deformation of the polyurethane foam filled with n-octadecane increases and the related tensile strength and the elongation at break decrease.
出处
《浙江理工大学学报（自然科学版）》
2018年第1期51-56,共6页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
关键词
聚氨酯
发泡棉
正十八烷
相变热
polyurethane
foamed cotton
n-octadecane
phase change heat
作者简介
菅哲（1993-）,男,河南商丘人,硕士研究生,主要从事聚氨酯发泡棉方面的研究.;周岚,E-mail：lan-zhou330@163.com
