混沌转子的混合特性及其在ABS/Al2O3导热材料制备中的应用  

Mixing Characteristics of a Chaos Rotor and Its Application for Preparation of Thermally Conductive ABS/Al_2O_3 Composites

作　　者：金建立[1] 马玉录[1] 谢林生[1] 陈涛[1] 廖洋威 

机构地区：[1]华东理工大学,绿色高效过程装备与节能教育部工程研究中心,上海200237

出　　处：《中国塑料》2017年第7期75-81,共7页China Plastics

基　　金：国家自然科学基金(51273065)

摘　　要：利用Polyflow软件对混沌转子及标准转子进行建模模拟,通过对流场的混合指数、累积解聚功及Lyapunov指数分布的分析,研究了2种转子的混炼流场特性以及转子构型和转子转速对其分散分布混合能力的影响,并制备了丙烯腈-丁二烯-苯乙烯共聚物/球形氧化铝(ABS/Al_2O_3)导热复合材料。研究了Al_2O_3粒径、转子结构与混炼工艺对复合材料导热性能的影响。结果表明,采用混沌转子及提高转速均可以获得更好的分散分布混合效果;当Al_2O_3含量为70%(质量分数,下同)时,采用混沌转子,转速为500r/min时获得最佳的导热及力学性能,所得到的材料的热导率可达1.3W/(m·K);通过添加石墨(C)可以提高材料的热导率,当Al_2O_3含量为65%、C含量为5%时热导率可达2.1 W/(m·K)。Models for chaos rotors and standard rotors are established by a Polyflow software.Effects of rotor configuration and rotor speed on dispersive and distributive mixing capabilities were investigated through mixing index,cumulative deagglomerating energy and Lyapunov index of flow fields.ABS/Al_2O_3 composites were also prepared to study effects of particle size,rotor structure and mixing process on their thermal conduction.The results indicated that a better dispersion could be achieved by using the chaotic rotors and increasing rotating speed.Composites containing70wt% of Al_2O_3 achieved the maximum thermal conductivity and mechanical properties when the chaotic rotor was used at a rotating speed of 500r/min,and the thermal conductivity reached1.3 W/(m·K).In addition,the addition of graphite fiber could improve thermal conductivity of the composites,and the thermal conductivity reaches 2.1 W/(m·K)when 65wt% of Al_2O_3 and 5wt% of graphite fiber were incorporated.

关 键 词：混沌转子 球形氧化铝 热导率 力学性能 转子构型 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ325.2[化学工程—合成树脂塑料工业]