镁镍铝水滑石的合成及其在聚丙烯耐老化中的应用

Preparation of MgNiAl-LDHs and Its Application in Anti-aging of Polypropylene

中文关键词:  镁镍铝水滑石  聚丙烯  抗老化  复合材料

英文关键词:MgNiAl-LDHs  Polypropylene(PP)  Anti-aging  Composites

中文摘要:

      采用沉淀法合成了镁镍铝水滑石(MgNiAl-LDH),研究了不同尿素和水热温度对合成MgNiAl-LDH的影响。通过X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)和扫描电镜(SEM)对MgNiAl-LDH进行了表征。将制得的MgNiAl-LDH添加至聚丙烯中(PP)中,制备MgNiAl-LDH/PP复合材料,通过加速老化及力学性能测试考察了MgNiAl-LDH的添加量对复合材料性能的影响。研究结果表明,当Mg²⁺∶Ni²⁺∶Al³⁺为2∶1∶1,反应温度为100 ℃、尿素用量为二价金属阳离子(Mg²⁺+Ni²⁺)摩尔浓度的2.5倍时,合成结晶良好的MgNiAl-LDH。复合材料耐老化实验结果表明,当MgNiAl-LDH的填充量为6 wt%时,经加速老化后,MgNiAl-LDH/PP复合材料拉伸强度基本保持不变,抗老化性能明显。

英文摘要:

      MgNiAl-LDHs had been synthesized by decomposition method.We studied the impact on synthesizing MgNiAl-LDHs at different temperatures and different amounts of urea.The characteristics of the MgNiAl-LDHs were investigated by X-ray diffraction(XRD),fourier transform infrared(FTIR)and scanning electron microscopy(SEM).We added MgNiAl-LDH into PP to obtain MgNiAl-LDH/PP composites and then texted the influence of the loading of MgNiAl-LDH on the composites by accelerating aging and measuring the mechanical properties.The results showed that MgNiAl-LDHs can be synthesized well at the temperature of 100 ℃ with the urea /(Mg²⁺+Ni²⁺)molar ratio of 2.5∶1.The anti-aging dates demonstrated that composites anti-aging had increased considerably and the tensile strength could remain constant when the loading of the MgNiAl-LDHs was at 6 wt% under UV light irradiation.