摘要本文主要研究高分散性氢氧化镁及其阻燃尼龙6体系，选取硬脂酸与硬脂酸钙作为表面活性剂，以不同配比对氢氧化镁进行改性，研究改性后的纳米形貌和亲疏水性，分散性。再将其作为阻燃剂添加到尼龙6中，研究其阻燃性能和力学性能。63848

通过沉淀法制备氢氧化镁并对其进行改性。采用FTIR、TG、XRD、SEM、石蜡沉降等研究方法对改性后氢氧化镁进行表征分析。结果表明：硬脂酸/硬脂酸钙复合改性氢氧化镁具有良好的亲油性和纳米形貌。 

选取改性配比最优(SA:CaSt=1:2)的氢氧化镁作为阻燃剂，以不同添加量加入到尼龙6中，探究其阻燃性能，力学性能。结果表明：与未改性复合材料相比，改性后氢氧化镁阻燃尼龙6的力学性能明显提高。

毕业论文关键词  氢氧化镁 硬脂酸 硬脂酸钙 PA6 阻燃

毕业设计说明书（论文）外文摘要

Title  The preparation of high performance magnesium hydroxide and the research of flame-retardant PA 6 with MH

Abstract This paper studies the preparation of high dispersion MH and the flame retardant PA6 system, and explores the effect of SA and CaSt on modified MH. The nanometer morphology and hydrophobicity of MH which was modified by different ratio of SA and CaSt was studied. The fire-retardant properties and mechanical properties were studied, when the modified MH was added into PA6 as flame retardation.

    We prepared MH by precipitation method and modified it. The modified MH was analysed by the FTIR, TG, XRD, SEM and settlement . The results showed that SA and CaSt can improve the dispersion of nanometer and morphology of MH.

The MH modified with the ratio of SA/CaSt 1/2 was selected as the flame retardant because it has the best performance. The flame retardant properties and mechanical properties were studied. The results showed that the mechanical properties of modified MH flame retardant PA6 were better than unmodified MH.

Keywords  MH SA CaSt PA6 Flame-retardant

目次

1  绪论 1

1．1  阻燃尼龙6研究现状及发展方向 1

1．1．1  尼龙6简介 1

1．1．2  阻燃剂简介 1

1．1．3  阻燃尼龙6研究现状及发展方向 3

1．2  氢氧化镁阻燃剂的研究现状及发展方向 3

1．2．1  氢氧化镁阻燃剂简介 3

1．2．2  氢氧化镁的制法 4

1．2．3  氢氧化镁的改性 4

1．2．4 氢氧化镁阻燃剂的发展趋势 5

1．3  本文研究思路 6

1．3．1 高性能氢氧化镁的制备 6

1．3．2 改性氢氧化镁阻燃尼龙 6的研究 6

2  高性能氢氧化镁的制备及表征 6

2．1  实验原料及仪器 6

2．2  改性氢氧化镁的制备 8

2．2．1  氢氧化镁制备 8

2．2．2  改性氢氧化镁制备 8

2.  3 氢氧化镁表征 8

2．3．1  红外吸收光谱（FTIR） 8

2．3．2  X射线衍射（XRD）