第45卷第3期(总第360期)电镀与精饰2023年3月聚谷氨酸修饰BN对BN@聚谷氨酸/硅橡胶复合材料性能的影响研究张婷1*,宋健民2(1.郑州黄河护理职业学院,河南郑州450066;2.郑州大学水利与土木工程学院,河南郑州450001)摘要:采用聚谷氨酸(γ-PGA)对氮化硼(BN)进行表面修饰,用以制备BN@γ-PGA/硅橡胶复合材料。采用XRD、FTIR、SEM和TG等测试手段对样品的结构、形貌和热稳定性进行了表征,研究结果表明,γ-PGA成功对BN进行修饰改性,并且未对BN晶体结构产生影响;经过γ-PGA修饰后的BN在硅橡胶中的团聚现象明显改善,同时提升了填料与基体间的界面相容性。研究了BN@γ-PGA的添加量对复合材料性能的影响,与BN/硅橡胶复合材料相比,BN@γ-PGA/硅橡胶复合材料导热系数得到了提升,当BN@γ-PGA填充量为30wt.%时,复合材料导热系数提高到0.89W/(m·K),是原始BN/硅橡胶复合材料导热系数的1.5倍,是纯硅橡胶的4.9倍,拉伸强度在3.2MPa,断裂伸长率为107%,此外,复合材料的热稳定性也有着一定的提升。关键词:聚谷氨酸;氮化硼;硅橡胶;表面修饰;导热性能;拉伸强度中图分类号:TQ333.93文献标识码:AEffectofpolyglutamicacidmodifiedBNonpropertiesofBN@polyglu‐tamicacid/siliconerubbercompositesZhangTing1*,SongJianmin2(1.ZhengzhouYellowRiverNursingVocationalCollege,Zhengzhou450066,China;2.CollegeofWaterConservancyandCivilEngineering,ZhengzhouUniversity,Zhengzhou450001,China)Abstract:Thesurfacemodificationofboronnitride(BN)withpolyglutamicacid(γ-PGA)wasusedtoprepareBN@γ-PGA/siliconerubbercomposites.Thestructure,morphologyandthermalstabilityofthesampleswerecharacterizedbyXRD,FTIR,SEMandTG.Theresultsshowedthatγ-PGAmodifiedBNsuccessfully,andhadnoeffectonthecrystalstructureofBN.Afterγ-PGAmodification,theagglomerationphenomenonofBNinsiliconerubberisimprovedobviously,andtheinterfacecompati‐bilitybetweenfillerandmatrixisimproved.TheeffectofcontentofBN@γ-PGAonthepropertiesofthecompositeswasstudied.ComparedwithBN/siliconerubbercomposite,thethermalconductivityofBN@γ-PGA/siliconerubbercompositehasbeenimproved.WhenBN@γ-PGAcontentis30wt.%,thethermalconductivityofthecompositeisincreasedto0.89W/(m·K),about1.5timesofthatoftheBN/s...