球磨对微晶纤维素形态结构与性能的影响  

Effect of Ball Milling on Morphology,Structure and Properties of Microcrystalline Cellulose

作　　者：张美云 王静[1,2] 李金宝 成锐[1,2] 马飞燕 ZHANG Mei-yun;WANG Jing;LI Jin-bao;CHENG Rui;MA Fei-yan(College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science ＆ Technology, Xi＇an, Shaanxi Province, 710021;National Demonstration Center jbr Experimental Light Chemistry Engineering Education, Shaanxi Urtiversity of Science ＆ Technology, Xi＇an, Shaanxi Province, 710021)

机构地区：[1]陕西科技大学轻工科学与工程学院,陕西西安710021 [2]轻化工程国家级实验教学示范中心(陕西科技大学),陕西西安710021

出　　处：《中国造纸》2018年第4期7-11,共5页China Pulp & Paper

基　　金：国家重点研发计划项目(2017YFB0307901);陕西省重点研发计划项目(2017ZDXM-SF-090);东华大学国家重点实验室开放基金项目(LK1601)

摘　　要：微晶纤维素(MCC)的粒径和形貌对其流动性的影响至关重要,而球磨可改变粉体的形貌与粒径,本研究详细分析了干法球磨对MCC粒径变化、微观形貌、流动性、结晶度和热稳定性的影响。结果表明,球磨会降低MCC的粒径值,但球磨处理时间过长,MCC生成二次颗粒导致其粒径增大,结晶度显著降低;热稳定性分析表明,随球磨时间的增加,MCC完全降解,温度降低,热稳定性下降;同时MCC的形貌由短棒状变为球状,休止角的测定结果表明流动性逐渐变好。实验制得的具有不同形貌和流动性的MCC可满足不同种类MCC的应用特性要求。The effect of particle size and morphology of microcrystalline cellulose（ MCC） on its fluidity is very important. The ball milling can change the morphology and particle size,so in this paper,the effects of dry milling on the particle size,morphology,fluidity,crystallinity and thermal stability of MCC were analyzed in detail. The results showed that ball milling reduced the particle size of MCC,but too long milling time,the secondary particles formed between MCC resulted in the increase of particle size and the decrease of crystallinity. The thermal stability analysis showed that as the milling time increasing,the complete degradation temperature of MCC decreased and the thermal stability decreased. Meanwhile,the morphology of MCC changed from a short rod to a spherical shape,and the determination results of the angle of repose indicated that the fluidity became better. Finally,MCC with different morphology and fluidity can meet different application requirements.

关 键 词：微晶纤维素 球磨 粒径分布 微观形貌 流动性 

分 类 号：TS712[轻工技术与工程—制浆造纸工程]