CAJ | 학술논문

将3种不同的Fe3O4@还原氧化石墨烯(rGO)–四氢呋喃(THF)复合磁性粒子分散液分别与聚氨酯(PUR)弹性体进行原位聚合制备3种PUR弹性体／Fe3O4@rGO磁性复合材料，并对其组分和分散状态进行了表征，系统研究了Fe3O4@rGO复合磁性粒子对PUR弹性体磁性能、热性能和力学性能的影响。结果表明，仅掺入质量分数为0.5%的Fe3O4@rGO复合磁性粒子可以显著提高PUR弹性体的性能。随着Fe3O4@rGO复合磁性粒子中rGO含量的增加，PUR弹性体复合材料的饱和磁化强度逐渐下降，热稳定性和力学性能均逐渐提高。当复合磁性粒子中rGO质量分数为60%时，复合材料的力学性能最佳，拉伸强度、断裂伸长率和拉伸弹性模量分别为35.31 MPa，438.90%和86.42 MPa，玻璃化转变温度、最大损耗因子和在–60℃时的储能模量分别达10.64℃，0.41和3805.84 MPa。此外，扫描电子显微镜观察发现，Fe3O4@rGO复合磁性粒子在基体中具有良好的分散性。
장3충불동적Fe3O4@환원양화석묵희(rGO)–사경부남(THF)복합자성입자분산액분별여취안지(PUR)탄성체진행원위취합제비3충PUR탄성체／Fe3O4@rGO자성복합재료，병대기조분화분산상태진행료표정，계통연구료Fe3O4@rGO복합자성입자대PUR탄성체자성능、열성능화역학성능적영향。결과표명，부참입질량분수위0.5%적Fe3O4@rGO복합자성입자가이현저제고PUR탄성체적성능。수착Fe3O4@rGO복합자성입자중rGO함량적증가，PUR탄성체복합재료적포화자화강도축점하강，열은정성화역학성능균축점제고。당복합자성입자중rGO질량분수위60%시，복합재료적역학성능최가，랍신강도、단렬신장솔화랍신탄성모량분별위35.31 MPa，438.90%화86.42 MPa，파리화전변온도、최대손모인자화재–60℃시적저능모량분별체10.64℃，0.41화3805.84 MPa。차외，소묘전자현미경관찰발현，Fe3O4@rGO복합자성입자재기체중구유량호적분산성。
Three kinds of polyurethane(PUR) elastomer/Fe3O4@reduced graphene oxide(rGO) composites were prepared by incorporating Fe3O4@rGO–tetrahydrofuran(THF) dispersion into PUR elastomer matrix using in-situ polymerization method. The components of the PUR elastomer and PUR/Fe3O4@rGO elastomer composites were characterized by XRD,and the disperse situation was studied by SEM. In addition,the effects of Fe3O4@rGO composite magnetic particles on the thermal,magnetic and mechanical properties of the composite were further investigated in detail. It is found that the Fe3O4@rGO composite magnetic particles have great effects on the properties of the composites. The magnetic,thermal and mechanical properties of the composites are all improved at low loading of 0.5%. At the same time,with the increase of the rGO amount in Fe3O4@rGO composite magnetic particles,the saturation magnetization of the corresponding magnetic composites decrease,and the thermal stability and mechanical properties are gradually increased. When the rGO content in Fe3O4@rGO composite magnetic particles accounted for 60%,PUR/ Fe3O4@rGO composites show higher mechanical properties,which the tensile strength,the elongation at break,the tensile elastic modulus,the glass transition temperature,the maximum loss factor and the storage modulus at–60℃are up to 35.31 MPa, 438.90%,86.42 MPa,10.64℃,0.41 and 3 805.84 MPa,respectively. In addition,Fe3O4@rGO composite magnetic particles have good dispersion in PUR elastomer matrix.