使用硫酸锌、硼砂为原料，油酸为改性剂，采用一步法制备疏水硼酸锌（Zn2B6O11·3H2O）。用x射线衍射仪、傅里叶变换红外光谱仪、扫描电子显微镜、接触角测定仪等设备对样品的物相、形貌、疏水性进行了分析。结果表明，所制备的硼酸锌直径为1～2μm，片层厚度为0．1μm，接触角为105．1°；将硼酸锌与氢氧化镁[Mg（OH）2]复配用于乙烯-醋酸乙烯共聚物（EVA）阻燃时具有很好的协同阻燃作用，极限氧指数达到了38．5％；在EVA配方中加入疏水硼酸锌，复合材料的力学性能下降较慢，且优于加入相同量市售硼酸锌的复合材料。%Hydrophohic zinc borate （Zn2g6O11·3H2O） was prepared via a one-step wet synthesis from zinc sulfate and sodium borate, with oleic acid as the surfactant. The morphology and hydrophobic property of the products were analyzed by means of X-ray diffraction, Fourier transform infrated spectroscopy, contact angle analyzer, and scanning electron microscope. It indicated that the diameter and thickness of the products were 1-2μm and 0. 1 μm, respectively; the water contact angle was 105.1°. The prepared hydrophobic zinc borate was introduced into EVA/ Mg（OH）2 composites as a flame retardant. A synergetic effect was observed, the value of limited oxygen index reached 38. 5%, and the mechanical properties were only moderately decreased.
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