铝酸酯改性蛋壳粉填充PBAT复合材料制备与性能

Preparation and Properties of PBAT Composites Filled with Aluminate Modified Eggshell Powder

通过铝酸酯偶联剂(ACA)干法改性蛋壳粉(ESP),并与聚己二酸/对苯二甲酸丁二酯(PBAT)复合制备PBAT/ESP复合薄膜。为了确定ACA的最佳改性质量分数,通过测定改性前后ESP的接触角、沉降体积及吸油值对改性效果进行评价,并结合红外光谱分析表明ACA在ESP表面发生了反应。测定ESP/PBAT复合薄膜的吸水率、拉伸强度及断裂伸长率,并通过扫描电子显微镜观察对复合材料的性能与微观结构进行表征。结果表明:ACA能够将ESP表面由亲水性变为疏水性,改性后的ESP具有高的接触角、低沉降体积与吸油值;红外光谱分析表明了ACA在ESP表面发生了反应;当ACA改性的质量分数为2%时,ESP改性效果最好,复合材料体系相容性最好,分散均匀,薄膜材料的防水性能与力学性能最佳。

Eggshell powder(ESP)was modified by aluminate coupling agent(ACA)and compounded with polyadipic acid/butylene terephthalate(PBAT).In order to determine the best modified mass fraction of ACA,the modification effect was evaluated by measuring the contact angle,sedimentation volume and oil absorption value of ESP before and after modification.Combined with infrared spectrum analysis,ACA reacted on the surface of ESP.The water absorption,tensile strength and elongation at break of ESP/PBAT composite films were measured,and the properties and microstructure of the composites were characterized by scanning electron microscope.The results show that ACA can change the surface of ESP from hydrophilic to hydrophobic.The modified ESP has high contact angle,low sedimentation volume and oil absorption value.Infrared spectrum analysis show that ACA react on the surface of ESP.When the mass fraction of ACA modification is 2%,the effect of ESP modification is the best,the compatibility of composite system is the best,the dispersion is uniform,and the waterproof and mechanical properties of membrane materials are the best.