Abstract A facile method was designed for synthesizing hierarchical calcium silicate-calcium sulfate whiskers (H-CSW) via treatment of the calcium sulfate whiskers (CSW) in sodium silicate solution. Calcium silicate nanoparticles with a size of 70–100 nm were uniformly anchored on H-CSW surfaces and the specific surface areas of the whiskers increased from 6.0 m2·g−1 to 29.1 m2·g−1. The addition of 2.0 wt% of H-CSW in epoxy composite led to the increase of 10% in flexural strength, 16% in flexural modulus, 18% in storage modulus (30 °C) and 8 °C in glass transition temperature owing to the enhanced mechanical interlocking among H-CSW and the epoxy matrix.

中文翻译：

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分层硅酸钙-硫酸钙晶须的形成及应用

摘要 设计了一种通过在硅酸钠溶液中处理硫酸钙晶须（CSW）来合成分级硅酸钙-硫酸钙晶须（H-CSW）的简便方法。尺寸为 70-100 nm 的硅酸钙纳米粒子均匀地固定在 H-CSW 表面，晶须的比表面积从 6.0 m2·g-1 增加到 29.1 m2·g-1。在环氧树脂复合材料中添加 2.0 wt% 的 H-CSW 导致弯曲强度增加 10%，弯曲模量增加 16%，储能模量（30°C）增加 18%，玻璃化转变温度增加 8°C，这是由于H-CSW 和环氧树脂基体之间增强的机械互锁。