A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Aragonite fiber and preparation method thereof, cement-based material and cement product
The invention relates to the technical field of inorganic non-metallic materials, in particular to aragonite fibers, a preparation method of the aragonite fibers, a cement-based material and a cement workpiece. The preparation method comprises the following steps: preparing raw materials including calcium ions, urease and urea into a mixed solution, and carrying out precipitation reaction to obtain aragonite fibers; wherein the mixed solution further comprises at least one of amylose, magnesium ions and sulfate ions, and the temperature of the mixed solution is lower than or equal to 50 DEG C. The catalyst promotes urea hydrolysis to generate carbonate ions, and then the carbonate ions and calcium ions generate calcium carbonate precipitates. On one hand, amylose, magnesium ions and sulfate ions can induce calcium ions and carbonate ions to generate aragonite crystals and inhibit generation of other allotropic variants; on the other hand, aragonite crystals can be induced to precipitate in a microfiber form, generation of rodlike fibers is promoted, and generation of particles in other micromorphologies is inhibited. The prepared aragonite fiber has a good microfiber form, is not easy to agglomerate, and can be used for reinforcing a cement-based material.
本申请涉及无机非金属材料技术领域，尤其涉及文石纤维及其制备方法、水泥基材料、水泥制件。制备方法包括如下步骤：将包括钙离子、脲酶、尿素的原料配制成混合溶液进行沉淀反应，得到文石纤维；其中，混合溶液中还包括直链淀粉、镁离子、硫酸根离子中的至少一种，混合溶液的温度≤50℃。催化剂促使尿素水解生成碳酸根离子，再与钙离子生成碳酸钙沉淀。直链淀粉、镁离子、硫酸根离子一方面可以诱导钙离子与碳酸根离子生成文石晶体，并抑制其他同质异象变体的生成；另一方面，可以诱导文石晶体以微纤维形态沉淀，促使棒状纤维的产生，抑制其他微观形态颗粒的生成。制得文石纤维具有良好的微纤维形态，不易团聚，可以用于增强水泥基材料。
Aragonite fiber and preparation method thereof, cement-based material and cement product
The invention relates to the technical field of inorganic non-metallic materials, in particular to aragonite fibers, a preparation method of the aragonite fibers, a cement-based material and a cement workpiece. The preparation method comprises the following steps: preparing raw materials including calcium ions, urease and urea into a mixed solution, and carrying out precipitation reaction to obtain aragonite fibers; wherein the mixed solution further comprises at least one of amylose, magnesium ions and sulfate ions, and the temperature of the mixed solution is lower than or equal to 50 DEG C. The catalyst promotes urea hydrolysis to generate carbonate ions, and then the carbonate ions and calcium ions generate calcium carbonate precipitates. On one hand, amylose, magnesium ions and sulfate ions can induce calcium ions and carbonate ions to generate aragonite crystals and inhibit generation of other allotropic variants; on the other hand, aragonite crystals can be induced to precipitate in a microfiber form, generation of rodlike fibers is promoted, and generation of particles in other micromorphologies is inhibited. The prepared aragonite fiber has a good microfiber form, is not easy to agglomerate, and can be used for reinforcing a cement-based material.
本申请涉及无机非金属材料技术领域，尤其涉及文石纤维及其制备方法、水泥基材料、水泥制件。制备方法包括如下步骤：将包括钙离子、脲酶、尿素的原料配制成混合溶液进行沉淀反应，得到文石纤维；其中，混合溶液中还包括直链淀粉、镁离子、硫酸根离子中的至少一种，混合溶液的温度≤50℃。催化剂促使尿素水解生成碳酸根离子，再与钙离子生成碳酸钙沉淀。直链淀粉、镁离子、硫酸根离子一方面可以诱导钙离子与碳酸根离子生成文石晶体，并抑制其他同质异象变体的生成；另一方面，可以诱导文石晶体以微纤维形态沉淀，促使棒状纤维的产生，抑制其他微观形态颗粒的生成。制得文石纤维具有良好的微纤维形态，不易团聚，可以用于增强水泥基材料。
Aragonite fiber and preparation method thereof, cement-based material and cement product
文石纤维及其制备方法、水泥基材料、水泥制件
LONG WUJIAN (author) / HU KAIYUE (author) / ZHONG ANNAN (author) / FENG GANLIN (author) / LUO QILING (author) / XING FENG (author)
2025-01-03
Patent
Electronic Resource
Chinese
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