-76-第46卷第3期非金属矿Vol.46No.32023年5月Non-MetallicMinesMay,2023基于物理及化学改性制备高分散性石墨烯试验李国栋1,2,3*尤大海1,2,3彭兴华1,2,3胡修权1,2,3张晋1,2,3张朝宏1,2,3张立1,2,3（1湖北冶金地质研究所(中南冶金地质研究所)，湖北宜昌443003；2湖北省矿物材料及应用工程技术研究中心，湖北宜昌443003；3矿产资源综合利用宜昌市重点实验室，湖北宜昌443003）摘要纳米石墨烯具有疏水性强、比表面积大等特点，片层间极易产生相互作用导致团聚，而石墨烯大部分优异性能仅限于单层或少层结构，石墨烯分散性差严重制约其产业化，亟需制备高分散性石墨烯水分散液。以自制石墨烯为原料，通过物理分散试验和化学接枝改性试验，探究不同手段对石墨烯分散液稳定性的影响。结果表明，石墨烯质量浓度为1.0g/L，聚丙烯酸与石墨烯质量比为4∶1，超声仪功率为300W，搅拌速度为250r/min，处理时间为8h，可获得分散率为95.58%、zeta电位为-41.4mV的高分散高稳定性石墨烯水分散液，静置30d未出现肉眼可见聚沉现象。关键词石墨烯；改性；物理分散；化学接枝改性；高分散性中图分类号：TB32文献标志码：A文章编号：1000-8098(2023)03-0076-05PreparationofHighlyDispersedGrapheneBasedonPhysicalandChemicalModificationsLiGuodong1,2,3*YouDahai1,2,3PengXinghua1,2,3HuXiuquan1,2,3ZhangJin1,2,3ZhangChaohong1,2,3ZhangLi1,2,3(1HubeiInstituteofMetallurgicalGeology(CentralSouthInstituteofMetallurgicalGeology),Yichang,Hubei443003;2MineralMaterialsandAppliedEngineeringTechnologyResearchCenterofHubeiProvince,Yichang,Hubei443003;3YichangKeyLaboratoryofComprehensiveUtilizationofMineralResources,Yichang,Hubei443003)AbstractNanographenehasstronghydrophobicityandlargespecificsurfacearea.Lamellarinteractionscaneasiluleadtoagglomerate,whilemostoftheexcellentpropertiesofgraphenearelimitedtosingle-layerorfew-layer.Therefore,thepoordispersionofgrapheneseriouslyrestrictsitsindustrialization,andthepreparationofhighlydispersedgrapheneaqueousdispersionhasbecomeanurgentproblem.Inthisexperiment,theeffectofdifferentmethodsonthestabilityofgraphenedispersionwasinvestigatedbyphysicaldispersiontestandchemicalgraftingmodificationtestusingself-madegrapheneasrawmaterial.Theresultsshowedthatwhengr...
