One-Step Synthesis of Calcium Sulfate Hemihydrate Nanofibers from Calcite at Room Temperature,ACS Omega

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One-Step Synthesis of Calcium Sulfate Hemihydrate Nanofibers from Calcite at Room Temperature
ACS Omega ( IF 3.7 ) Pub Date : 2018-03-08 00:00:00 , DOI: 10.1021/acsomega.7b01994
Satoru Fukugaichi ₁ , Naoto Matsue ₂

Affiliation

In recent years, researchers have made significant progress in the development of inorganic nanofibers (including nanowires). Typically, inorganic nanofibers are synthesized via crystal growth in solution; however, a limited number of studies have focused on their preparation directly from solid raw materials (with no examples of synthesis conducted at room temperature and atmospheric pressure). In this work, we successfully synthesized nanofibers of calcium sulfate hemihydrate (bassanite, CaSO₄·0.5H₂O) at 20 °C and 1 atm by mixing calcite and dilute sulfuric acid in methanol. The bassanite nanofibers are concluded to be synthesized by the formation of calcium sulfate on the calcite surface and its simultaneous reaction with the generated H₂O. Because bassanite exhibits useful physical properties that include high mechanical strength, high thermal stability, and excellent chemical stability, its nanofibers can be widely applied to rubber, plastics, antifriction materials, and paper as a strengthening agent, for heat-resistance, or as a flame retardant, or for creep resistance.

中文翻译：

室温下由方解石一步合成硫酸钙半水合纳米纤维

近年来，研究人员在无机纳米纤维（包括纳米线）的开发方面取得了重大进展。通常，无机纳米纤维是通过溶液中的晶体生长合成的。然而，有限的研究集中在直接从固体原料制备它们上（没有在室温和大气压下进行合成的例子）。在这项工作中，我们通过在甲醇中混合方解石和稀硫酸，在20°C和1个大气压下成功合成了半水合硫酸钙纳米纤维（玄武岩，CaSO ₄ ·0.5H ₂ O）。结论是，方解石纳米纤维是通过在方解石表面形成硫酸钙并与生成的H ₂同时反应而合成的O.由于重钙铝石具有有用的物理性能，包括高机械强度，高热稳定性和出色的化学稳定性，因此其纳米纤维可广泛应用于橡胶，塑料，减摩材料和纸张，作为增强剂，以提高耐热性，或作为阻燃剂或抗蠕变性。

更新日期：2018-03-08

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