PA1012/n-HAP复合粉体的制备及热性能和流动性表征  

Study on Thermal and Flowability Properties of PA1012/n-HAP Composite Powders and Their Preparation

作　　者：曹毅 张雅琪 孙梦迪 张震 汪梦月 胡博 陈海涛 于翔 

机构地区：[1]河南工程学院材料与化学工程学院,河南郑州450007 [2]河南理工大学材料科学与工程学院,河南焦作454001 [3]中维化纤股份有限公司,河南鹤壁456750

出　　处：《塑料科技》2018年第1期21-25,共5页Plastics Science and Technology

基　　金：基金项目:河南工程学院功能纺织高分子材料科技创新团队(CXTD2013004)

摘　　要：通过高温高压溶剂沉淀法成功制备了选择性激光烧结（SLS）用聚酰胺1012／纳米羟基磷灰石（PAl012／n-HAP）复合粉体。采用羞示扫描量热法（DSC）详细分析了复合粉体的热性能，通过扫描电镜（sEM）分析，激光粒度分析．休止角及堆积密度测试对复合粉体的形貌和流动性进行了探究。结果发现：与同比例PAl012，n-HAP复合材料相比，溶剂沉淀法所制备PAl012／n-HAP复合粉体的熔融温度降低了4-6℃，且结晶度明显提高；PAl012/n-HAP复合粉体的烧结温度窗口宽于纯PAl012粉体，且当HAP含量为1％时达到最大值17．1℃。由于复合粉体粒径可随HAP含量的变化而改变，因此能实现对粉体粒径的调控。在加入10％的HAP时，粉体粒径由纯PAl012粉体的126．14μm降至54．87μm，且粉体趋于规整的球体；随着HAP含量的增加，复合粉体的堆积密度逐渐增大，休止角则呈下降趋势，且粉体流动性增强。Polyamide 1012/nano-hydroxyapatite （PA1012/n-HAP） composite powders for selective laser sintering （SLS） were prepared by solvent precipitation with high temperature and pressure. By differential scanning calorimetry （DSC）, the thermal performance of the composite powders was detailedly analyzed, and scanning electron microscopy （SEM）, laser particle size analyzer, the angle of repose and packing density test were employed to study the morphology and flowability of powders. The results show that the melting point of PA1012/n-HAP composite powders prepared by solvent precipitation is lower than that of PA1012/n-HAP composite materials with same proportion, but the crystallinity improves obviously. The window of sintering temperature of composite powders is wider than that of pure PA1012 powders, and increases to 17.1℃ when the content of HAP is 1%. This experiment successfully realizes the particle size regulation of PA1012/n-HAP composite powders by changing the content of HAP. The particle size of the composite powders decreases from 126.14 μm （pure PA1012 powders） to 54.87 μm, and the composite powders tend to be regularly spherical body. With the increase of HAP content, the packing density of composite powders increases gradually, and the angle of repose decreases, while the flowability increases.

关 键 词：聚酰胺1 012 复合粉体 选择性激光烧结 堆积密度 休止角 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]