利用异氰酸苯酯(MDI)对空心玻璃微珠(HGMS)表面进行修饰,通过溶液共混法制得HGMS-NCO材料,并将其作为硬质聚氨酯泡沫(RPUF)的增强填料制备HGMS-NCO/RPUF复合泡沫。利用红外光谱(FT-IR)和扫描电子显微镜(SEM)对所合成的HGMS-NCO材料进行表征。HGMS-NCO/RPUF复合泡沫的压缩试验结果表明,与纯RPUF相比,HGMS-NCO/RPUF(25%)的表观密度、压缩强度分别提高了35.18%和48.62%。此外,HGMS-NCO的加入提高了RPUF泡沫的热稳定性。HGMS-NCO/RPUF的吸水率和导热系数随填料质量的增加呈现先减小后增大的趋势,添加25%泡沫的吸水率为3.4%,导热系数为0.023 82 W/(m·K)。

HGMS-NCO is obtained through modifying hollow glass microspheres (HGMS) surface by phenyl isocyanate (MDI) and solution blending method,and used as an enhanced filler for hard polyurethane foam (RPUF) to prepare HGMS-NCO/RPUF composite foam.HGMS-NCO is characterized by means of infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM).The results from the compression test of HGMS-NCO/RPUF composite foam show that the apparent density and compression intensity of HGMS-NCO/RPUF (25 wt%) are 35.18% and 48.62% respectively higher than that of pure RPUF.Furthermore,the addition of HGMS-NCO improves the thermal stability of RPUF foam.The water absorption rate and thermal conductivity of HGMS-NCO/RPUF foam decrease firstly and increase then with the increasing mass content of fillings.HGMS-NCO/RPUF foam with an fillings addition of 25wt% can absorb 3.4% of water,and has a thermal conductivity of 0.023 82 W·m^-1·K^-1.

刘冬(1986-),男,博士研究生,讲师,研究方向为聚合物基复合材料,liudong224@126.com