微生物球磨制备微粉化粉煤灰及其对天然橡胶补强性能的研究  

Micronized Fly Ash Prepared through Microbiolization and Ball Milling and Its Reinforcement to NR

作　　者：孟子毅 刘永明 蒯荣 雷乾杰 付旭东 张荣 胡圣飞 刘清亭 MENG Ziyi;LIU Yongming;KUAI Rong;LEI Qianjie;FU Xudong;ZHANG Rong;HU Shengfei;LIU Qingting(Hubei University of Technology,Wuhan 430068,China;Beihang University,Beijing 100191,China)

机构地区：[1]湖北工业大学材料与化学工程学院/绿色轻工材料湖北省重点实验室,湖北武汉430068 [2]北京航空航天大学材料科学与工程学院,北京100191

出　　处：《橡胶工业》2022年第12期883-890,共8页China Rubber Industry

基　　金：绿色轻工材料湖北省重点实验室开放基金项目(201906A07)。

摘　　要：先将粉煤灰进行微生物腐蚀处理,然后通过球磨工艺制备微粉化粉煤灰,球磨20 min即可将粉煤灰的平均粒径由约1250 nm高效减小至约194 nm,比相同条件下直接球磨得到的粉煤灰平均粒径(504 nm)大幅减小。微生物改性粉煤灰即使经过球磨后其表面仍附着有亲水亲油性的生物膜,这有利于提高其与有机材料界面相容性。微粉化粉煤灰/炭黑并用的天然橡胶(NR)复合材料的拉伸强度可达24.6 MPa,与单纯炭黑补强的NR复合材料相当。扫描电子显微镜照片显示经微生物和球磨处理的微粉化粉煤灰与NR的相容性大幅改善。In the first step,the fly ash was subjected to microbial corrosion treatment,and then the micronized fly ash was prepared by ball-milling process.After 20 min of ball milling,the average particle size of the fly ash was effectively reduced from about 1250 nm to 194 nm,which was significantly smaller than that of the fly ash(about 504 nm)obtained by direct ball milling under the same conditions.More importantly,there were still hydrophilic and lipophilic biofilms on the surface of the microbial modified fly ash even after ball milling,which was beneficial to improve the interface compatibility of the fly ash and organic materials.The tensile strength of natural rubber(NR)composites with micronized fly ash/carbon black blend could reach 24.6 MPa,which was equivalent to that of NR composite reinforced by carbon black alone.The scanning electron microscope analysis also confirmed that the compatibility of the micronized fly ash after microbiolization and ball milling treatment with NR was greatly improved.

关 键 词：粉煤灰 微生物 腐蚀 球磨 微粉化 天然橡胶 补强 

分 类 号：TQ330.383[化学工程—橡胶工业] TQ332.6