摘要
粉煤灰填充聚合物泡沫材料以其轻质、高强、环保等诸多优越性能受到新型材料界的青睐,但粉煤灰分布不均匀的问题使其应用受限。在E51型环氧树脂-4,4′-二氨基二苯砜-聚碳酸亚丙酯(EP-DDS-PPC)聚合体系中分别引入不同粒径范围(80~150μm、45~80μm、<45μm)和不同质量分数(4%、8%、12%、16%)的粉煤灰,利用反应诱导相分离法制备粉煤灰填充环氧树脂泡沫材料。结果显示:粉煤灰粒径减小可缓解其在重力场下的沉积效应,有助于改善材料力学性能,当使用粒径<45μm的粉煤灰,填充量为4%时,材料拉伸强度达42.33 MPa。随着粉煤灰添加量由4%增至16%,材料平均孔径增大,孔密度降低,同时有二次相分离发生。此外,在限定范畴内,粉煤灰掺入并未对材料热力学稳定性造成显著影响,然而,却显著降低了该材料拉伸强度,这可能源于粉煤灰诱发的孔结构变化。研究成果丰富了固体颗粒参与的反应诱导相分离理论框架,且为多孔材料的绿色、高效制备提供了坚实的理论基础与切实可行的实践指导。
Fly ash-filled polymer foam materials are favored by the new material industry because of their light weight,high strength,environmental protection and many other superior properties.However,the uneven distribution of fly ash limits its application.Fly ash with different particle size ranges(80~150μm,45~80μm,<45μm)and different mass fractions(4%,8%,12%,16%)were introduced into the E51 epoxy resin-4,4′-diaminodiphenyl sulfone-poly(propylene carbonate)(EP-DDS-PPC)polymerization system,and fly ash filled epoxy resin foams were prepared by reaction-induced phase separation.The results show that the decrease of fly ash particle size can alleviate its deposition effect under gravity field and help to improve the mechanical properties of the material.When the fly ash with particle size<45μm is used and the filling amount is 4%,the tensile strength of the material reaches 42.33 MPa.With the increase of fly ash content from 4%to 16%,the average pore size of the material increases,the pore density decreases,and secondary phase separation occurs.In addition,within a limited range,the incorporation of fly ash did not significantly affect the thermodynamic stability of the material,however,it significantly reduced the tensile strength of the material,which may be due to the pore structure change induced by fly ash.This study not only enriches the theoretical framework of reaction-induced phase separation involving solid particles,but also provides a solid theoretical basis and practical guidance for the green and efficient preparation of porous materials.
作者
王军波
王银顺
王鹏
张满
米亚策
WANG Jun-bo;WANG Yin-shun;WANG Peng;ZHANG Man;MI Ya-ce(School of Chemical Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;National and Local Joint Engineering Research Center for High Value Utilization of Coal-based Solid Waste,Hohhot 010051,China;Key Laboratory of Resource Circulation in Inner Mongolia Autonomous Region,Hohhot 010051,China)
出处
《科学技术与工程》
北大核心
2026年第6期2259-2267,共9页
Science Technology and Engineering
基金
内蒙古自治区直属高校基本科研业务费(RZ200002361)
准格尔旗应用技术研究开发项目(2023YY-03)。
关键词
粉煤灰
环氧树脂
泡沫材料
反应诱导相分离
fly ash
epoxy resin
foam materials
reaction-induced phase separation
