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Modified calcium sulfate whisker reinforced geopolymer and preparation method thereof
The invention discloses a modified calcium sulfate whisker reinforced geopolymer and a preparation method thereof. The modified calcium sulfate whisker reinforced geopolymer comprises the following raw materials in parts by weight: 100 parts of a silicon-aluminum raw material, 35-80 parts of an alkali activator and 1-3 parts of a reinforcing agent. The alkali activator is prepared by mixing 0-20 parts of sodium hydroxide and 80-100 parts of water glass with the modulus of 1.2-3.4; and the reinforcing agent is trisodium phosphate modified calcium sulfate whisker. According to the trisodium phosphate modified calcium sulfate whiskers, monomolecular calcium hydrophosphate films are attached to the surfaces, so that Van der Waals force among the whiskers is reduced, re-agglomeration of the whiskers is prevented, and the calcium sulfate whiskers can be uniformly and independently distributed in a geopolymer matrix; meanwhile, a large number of hydroxyl groups (-OH) can be formed on the surfaces of the whiskers, the hydroxyl groups can participate in condensation polymerization of the geopolymer, effective combination of the whiskers and the geopolymer is achieved, and the geopolymer prepared through the method is excellent in mechanical property, and high temperature resistance and acid resistance.
本发明公开了一种改性硫酸钙晶须增强地聚合物及其制备方法，所述改性硫酸钙晶须增强地聚合物包括如下重量份的原料：100份硅铝质原料，35‑80份碱激发剂，1‑3份增强剂；碱激发剂由0‑20份的氢氧化钠与80‑100份的模数为1.2‑3.4的水玻璃混合制备而成；所述增强剂为磷酸三钠改性硫酸钙晶须。本发明的磷酸三钠改性后的硫酸钙晶须，表面会附着单分子层的磷酸氢钙薄膜，从而降低了晶须间的范德华力，阻止了晶须的再团聚，使硫酸钙晶须能够均匀独立的分布在地聚合物基体中；同时，会在晶须表面形成的大量羟基(‑OH)，其羟基可参与地聚合物的缩聚反应，实现晶须与地聚合物的有效结合，本发明制备的地聚合物力学性能、耐高温和耐酸性能优良。
Modified calcium sulfate whisker reinforced geopolymer and preparation method thereof
The invention discloses a modified calcium sulfate whisker reinforced geopolymer and a preparation method thereof. The modified calcium sulfate whisker reinforced geopolymer comprises the following raw materials in parts by weight: 100 parts of a silicon-aluminum raw material, 35-80 parts of an alkali activator and 1-3 parts of a reinforcing agent. The alkali activator is prepared by mixing 0-20 parts of sodium hydroxide and 80-100 parts of water glass with the modulus of 1.2-3.4; and the reinforcing agent is trisodium phosphate modified calcium sulfate whisker. According to the trisodium phosphate modified calcium sulfate whiskers, monomolecular calcium hydrophosphate films are attached to the surfaces, so that Van der Waals force among the whiskers is reduced, re-agglomeration of the whiskers is prevented, and the calcium sulfate whiskers can be uniformly and independently distributed in a geopolymer matrix; meanwhile, a large number of hydroxyl groups (-OH) can be formed on the surfaces of the whiskers, the hydroxyl groups can participate in condensation polymerization of the geopolymer, effective combination of the whiskers and the geopolymer is achieved, and the geopolymer prepared through the method is excellent in mechanical property, and high temperature resistance and acid resistance.
本发明公开了一种改性硫酸钙晶须增强地聚合物及其制备方法，所述改性硫酸钙晶须增强地聚合物包括如下重量份的原料：100份硅铝质原料，35‑80份碱激发剂，1‑3份增强剂；碱激发剂由0‑20份的氢氧化钠与80‑100份的模数为1.2‑3.4的水玻璃混合制备而成；所述增强剂为磷酸三钠改性硫酸钙晶须。本发明的磷酸三钠改性后的硫酸钙晶须，表面会附着单分子层的磷酸氢钙薄膜，从而降低了晶须间的范德华力，阻止了晶须的再团聚，使硫酸钙晶须能够均匀独立的分布在地聚合物基体中；同时，会在晶须表面形成的大量羟基(‑OH)，其羟基可参与地聚合物的缩聚反应，实现晶须与地聚合物的有效结合，本发明制备的地聚合物力学性能、耐高温和耐酸性能优良。
Modified calcium sulfate whisker reinforced geopolymer and preparation method thereof
一种改性硫酸钙晶须增强的地聚合物与其制备方法
WEI MING (author) / ZHANG CHANGSEN (author) / JIAO BAOXIANG (author) / SUN NAN (author) / HAN PENGDE (author) / CAI ANLAN (author) / CAI SHUYUAN (author)
2021-11-30
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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