Preparation and Performance Investigation of PA6/Aerogel Composite Powders with Phase Change Function by Solvent Precipitation Method

doi:10.19491/j.issn.1001-9278.2020.08.012

Abstract

Abstract:

In this study, PA6/Aerogel (AG) composite powders were prepared by the porous material adsorption and solvent precipitation methods, and their coating properties, flowability and durability were investigated by DSC, XRD, and laser particle size analyzer. The results indicated that the PA6/AG composite powders were successfully prepared as a type of phase change materials with excellent durability performance. When the paraffin/AG mass ratio was set to 1∶1 for the AGbased phase change composite materials and the mass ratio of PA6/AGbased phase change composite materials was set to 2∶1 for the composite powders, the AGbased phase change composite materials in the composite powders were completely covered by PA resin, and therefore an excellent durability was achieved. Moreover, the particle size of the composite powders increase to 85.62 μm at this mass ratio, and an optimal flowability was obtained.

Key words: polyamide 6, composite powders, phase change material, flowing property, preparation method

CLC Number:

TQ323.6

Xiang YU, Huanhuan TAN, Zhuo WANG, Yukun ZHANG, Yanfei AN, Junjie ZHAO. Preparation and Performance Investigation of PA6/Aerogel Composite Powders with Phase Change Function by Solvent Precipitation Method[J]. China Plastics, 2020, 34(8): 71-77.

Figures/Tables 13

Fig.1. Purification of AG phase change materials in different contents of ethanol (volume fraction)

Fig.2. Mass loss rate of AG phase change materials

Fig.3. DSC cycle curves of AG phase change materials

Fig.4. XRD curves of PA6/AG composite powders

Fig.5. Particle distribution of PA6/AG composite powders

PA6与AG相变材料的质量比	平均粒径/μm	粒度分布指数
1∶0	33.48	1.001
10∶3	43.78	0.741
2∶1	85.62	0.373
1∶1	51.62	0.833
1∶2	29.17	1.410

Tab.1. Average particle size and its distribution index of PA6/AG composite powders

Fig.6. DSC curves of PA6/AG composite powders

Fig.7. Time required for PA6/AG composite powders to flow through a standard funnel

Fig.8. Photo of repose angle of PA6/AG composite powders

PA6与AG相变材料的质量比	休止角α/(°)
1∶0	42.5
10∶3	40.0
2∶1	31.0
1∶1	35.0
1∶2	37.0

Tab.2. Repose angle of PA6/AG composite powders

PA6与AG相变材料的质量比	松装密度/ g/cm^-3	振实密度/ g·cm^-3	压缩度/ %
1∶0	0.103	0.128	19.059
1∶0.3	0.117	0.135	13.737
1∶0.5	0.209	0.228	8.330
1∶1	0.174	0.192	9.526
1∶2	0.159	0.179	11.024

Tab.3. Bulk density, tap density and compression degree of PA6/AG composite powders

Fig.9. Mass change rate of PA6/AG composite powders under temperature cycling test

Fig.10. SEM of PA6/AG composite powders

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