煤泥机械力化学法表面改性及应用研究  

Surface Modification of Coal Slime by a Mechano-Chemical Method and its Application

作　　者：盛嘉伟[1] 韩冬[1] 张俭[1] SHENG Jia-wei;HAN Dong;ZHANG Jian(Zhejiang University of Technology, College of Chemical Engineering and Materials Science,Hangzhou 310014, China)

机构地区：[1]浙江工业大学材料科学与工程学院,浙江杭州310014

出　　处：《高校化学工程学报》2017年第4期918-924,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：浙江省自然科学基金(LY14E020004)

摘　　要：机械力化学法改性煤泥粉体,采用单因素试验方法得出优化的改性参数:硬脂酸为改性剂,改性剂用量2%(wt),改性时间120 min,球料比5:1,球磨转速200 r·min^(-1),料浆浓度150%(wt);在优化工艺条件下,硬脂酸改性样品的活化指数、煤泥粉体的中位径、吸油值和接触角分别为85.6%、3.3μm、32.2 g·(100 g)^(-1)和114.9°。通过红外光谱分析发现,硬脂酸和煤泥粉体发生了物理吸附和化学反应。对煤泥/PP(聚丙烯)复合材料力学性能测试表明,改性后的煤泥粉体提高了PP的抗弯曲性能和抗冲击性能,分别由31.8 MPa和3.1 k J·m^(-2)提高到37.6 MPa和3.5 k J·m^(-2)。煤泥粉体/PP复合材料冲击断面的SEM照片表明:煤泥粉体经过改性后,与PP的相容性明显加强。A mechano-chemical method was used to modify coal slime,and single factor experiments wereapplied to optimize process parameters.Modified coal slime was prepared under conditions of stearic aciddosage2%(wt),modification time120min,ball to powder weight ratio=5to1,ball milling speed200r.min-1and slurry concentration=150%(wt).The activation index,median diameter,oil absorption and contact angle ofcoal slime after surface modification are85.6%,3.3μm,32.2g.(100g)-1and114.9°,respectively.FTIR spectraof coal slime indicate that stearic acid and coal slime are combined by physical adsorption and chemicalreaction.Mechanical tests of coal slime/PP composites show that the impact and bend performance of thecomposites increase from31.8to37.6MPa and3.1to3.5kJ.m-2,respectively.SEM results of fracture surfaceof coal slime/PP composites show that the composite compatibility is enhanced.

关 键 词：煤泥 硬脂酸 改性 复合性能 

分 类 号：Q813.11[生物学—生物工程]