首先用左旋多巴(dopa)对空心玻璃微珠(HGM)进行表面改性,制备了表面覆有dopa分子层的改性玻璃微珠(d-HGM);然后将d-HGM添加到乙基纤维素(EC)中,利用溶液浇铸法制备了d-HGM/EC复合材料。研究了HGM改性前后在EC中的分部情况,以及d-HGM添加对EC膜的力学性能、光学性能和隔热性能的影响。研究结果表明,d-HGM可在EC中形成排列均匀的微球层。添加6%的d-HGM,EC膜的拉伸强度提升了40.7%,400～700nm区间的光线透光率下降到30%左右。d-HGM可增加EC膜的隔热性能,添加10%的d-HGM,EC膜的导热系数下降了38.2%。
The hollow glass microspheres (HGM) were first modified with levodopa (dopa),then prepared the dopa covered HGM (d-HGM),and the d-HGM was added into Ethyl cellulose (EC) and prepared d-HGM/EC composites film.The dispersion of HGM(before and after modification) in EC matrix,and the influence of d-HGM on the mechanical properties,transmittance and thermal insulation of EC film were studied.The results showed that the d-HGM could form a microspheres layer in EC.Adding 6% d-HGM,the tensile stress of EC film was improved 40.7%,and the transmittance of EC film in 400～700 nm was decreased to 30%.The d-HGM could also increase the heat insulation of EC film,adding 10% d-HGM,the thermal conductivity was reduced by 38.2%.
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