NaA分子筛的合成和改性及其在聚氨酯体系中的应用

doi:10.19964/j.issn.1006-4990.2022-0683

Abstract

Abstract:

NaA zeolite was obtained by the single-mode focused microwave synthesis with sodium silicate as the silica source，sodium metaaluminate as the aluminum source.Surface modification for NaA zeolite was carried out by using silane coupling agent γ-（2，3-epoxypropoxy） propyl trimethoxysilane（KH-560），and the influences of coupling agent content（mass fraction），modification reaction temperature and reaction time on the viscosity of NaA zeolite slurry were studied.The crystal structure，particle size distribution，morphology and static water adsorption capacity of NaA zeolite before and after modification were discussed.NaA zeolites before and after modification was added into polyurethane system to study its application period.The results showed that the modified NaA zeolite were synthesized under the optimum conditions（i.e.，coupling agent content was 3%，reaction temperature was 60 ℃，reaction time was 50 min），and its viscosity in castor oil reached a minimum of （9 362±100） mPa·s.The structure and morphology of NaA zeolite were not changed before and after modification.The surface modification of NaA zeolite by using coupling agent KH-560 could effectively improve the dispersing property of NaA zeolite，reduce the slurry viscosity，and expend the pot life of NaA zeolite in polyurethane system.Adding modified NaA zeolite into polyurethane system had little effect on its mechanical properties.

Key words: modification of NaA zeolite, coupling agent, static water adsorption capacity, mechanical property, polyurethane

CLC Number:

TQ424.25

LI Sen, WANG Jin, WANG Yingying, CAI Mingfang. Synthesis and modification of NaA zeolite and its application in polyurethane system[J]. Inorganic Chemicals Industry, 2023, 55(10): 78-85.

Figures/Tables 14

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References 19

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样品	总比表面积/（m²·g^-1）	微孔比表面积/（m²·g^-1）	总孔体积/（cm³·g^-1）	微孔体积/（cm³·g^-1）
NaA分子筛	380.26	318.77	0.37	0.29
改性NaA分子筛	352.71	301.28	0.30	0.25

时间/h	相容性
时间/h	NaA分子筛	改性NaA分子筛
2	开始出现分层	无分层
12	一半分层	无分层
18	全部分层	无分层
96	全部分层	无分层
120	全部分层	无分层
144	全部分层	无分层
168	全部分层	无分层

样品	邵氏硬度/HA	拉伸最大力/N	断裂伸长率/%	撕裂强度/（kN·m^-1）
弹性体	65	34.63	90.79	25.81
弹性体中加改性NaA分子筛	65	33.75	89.64	25.17
弹性体中加NaA分子筛	67	32.15	85.43	23.64

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Synthesis and modification of NaA zeolite and its application in polyurethane system

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