有机/无机杂化室温固化热控涂层的制备

doi:10.15541/jim20180092

摘要/Abstract

摘要：

以正硅酸乙酯(TEOS)与硅氧烷共水解缩聚反应制备得到粘结剂,然后与作为固化催化剂的3-氨基丙基三乙氧基硅烷(APTES)和作为光学颜料的ZnO粉末混合,制备了一系列有机-无机杂化热控涂层(TCCS)。所制备的热控涂层可以在室温下自然固化, 且具有较低的太阳吸收比α_S和较高的发射率ε_H。红外光谱(FT-IR)和凝胶色谱(GPC)分析结果表明,所制备的混合粘结剂含有大量的活性羟基,聚合度适中。热重分析(TGA)表明,所制备的热控涂层在200℃以下具有良好的热稳定性。通过增加涂层厚度可以降低α_S/ε_H值,通过提高TEOS含量,可以降低涂层在红外波段的光学吸收。这为获得具有低α_S/ε_H值的室温固化TCCS提供了有效途径。

关键词: 室温固化, 热控涂层, 热稳定性, 低α_S/ε_H值;

Abstract:

A series of organic-inorganic hybrid thermal control coatings (TCCs) were prepared. The binder was prepared by co-pre-hydrolysis/condensation of tetraethylorthosilicate (TEOS) and siloxane, subsequently mixing with 3-aminopropyltriethoxysilane (APTES) as curing catalyst and ZnO powder as optical pigment. The coatings can be cured at room temperature naturally with low solar absorptance α_Sand high thermal emittance ε_H. Fourier transform infrared spectroscopy (FT-IR) and gel permeation chromatography (GPC) measurements were carried out to understand the structures of the coatings. FT-IR spectra and GPC analysis results showed that the as-prepared hybrid binder carried lots of active hydroxyls with an appropriate polymerization degree. Thermal gravimetric analyzer (TGA) test showed that as-prepared coatings have high thermal stability at 200℃. α_S/ε_H value could be further reduced by increasing the coating thickness, and optical absorption of the coatings in the infrared wave band could be further reduced by increasing TEOS content. This work provides an effective way to obtain room temperature cured TCCs with low α_S/ε_H value.

Key words: room temperature curing method, TCCs, thermal stability, low α_S/ε_H value;

中图分类号:

TQ174

刘丁, 于洋, 米乐, 于云, 宋力昕. 有机/无机杂化室温固化热控涂层的制备[J]. 无机材料学报, 2018, 33(8): 914-918.

LIU Ding, YU Yang, MI Le, YU Yun, SONG Li-Xin. Preparation of Room Temperature Curable Organic-inorganic Hybrid Thermal Control Coatings[J]. Journal of Inorganic Materials, 2018, 33(8): 914-918.

图/表 8

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Samples	TEOS /mol	MTES /mol	DMDS /mol	HCl /mol	H₂O /mL
TMD14-28	0.025	0.02	0.08	0.001	1.0
TMD14-55	0.025	0.05	0.05	0.001	1.0
TMD14-82	0.025	0.08	0.02	0.001	1.0
TMD12-28	0.05	0.02	0.08	0.001	1.5
TMD12-55	0.05	0.05	0.05	0.001	1.5
TMD12-82	0.05	0.08	0.02	0.001	1.5
TMD11-28	0.10	0.02	0.08	0.001	2.0
TMD11-55	0.10	0.05	0.05	0.001	2.0
TMD11-82	0.10	0.08	0.02	0.001	2.0

Samples	TEOS /mol	MTES /mol	DMDS /mol	HCl /mol	H₂O /mL
TMD14-28	0.025	0.02	0.08	0.001	1.0
TMD14-55	0.025	0.05	0.05	0.001	1.0
TMD14-82	0.025	0.08	0.02	0.001	1.0
TMD12-28	0.05	0.02	0.08	0.001	1.5
TMD12-55	0.05	0.05	0.05	0.001	1.5
TMD12-82	0.05	0.08	0.02	0.001	1.5
TMD11-28	0.10	0.02	0.08	0.001	2.0
TMD11-55	0.10	0.05	0.05	0.001	2.0
TMD11-82	0.10	0.08	0.02	0.001	2.0

Samples	BZSI-1-20	BZSI-1-30	BZSI-1-40	BZSI-1.25-20	BZSI-1.25-30	BZSI-1.25-40	BZSI-1.5-20	BZSI-1.5-30	BZSI-1.5-40
ZnO/g	25.34	25.34	25.34	31.68	31.68	31.68	38.01	38.01	38.01
P/g	25.34	25.34	25.34	31.68	31.68	31.68	38.01	38.01	38.01
NaOH/mol	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002
APTES/wt%	20	30	40	20	30	40	20	30	40

Samples	BZSI-1-20	BZSI-1-30	BZSI-1-40	BZSI-1.25-20	BZSI-1.25-30	BZSI-1.25-40	BZSI-1.5-20	BZSI-1.5-30	BZSI-1.5-40
ZnO/g	25.34	25.34	25.34	31.68	31.68	31.68	38.01	38.01	38.01
P/g	25.34	25.34	25.34	31.68	31.68	31.68	38.01	38.01	38.01
NaOH/mol	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002	0.002
APTES/wt%	20	30	40	20	30	40	20	30	40

Samples	SE-T1	SE-2	SE-3	SE-4	SE-5
Thickness/μm	32.3	98.6	110.3	121.2	132.3
α_S	0.31	0.30	0.29	0.25	0.23
ε_H	0.87	0.87	0.88	0.89	0.90