Jiang Yinan, Yang Zhanhong, Su Qingsong, Chen Linlin, Wu Jian, Meng Jinlei
Institute of Chemical Power and Materials, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
Institute of Chemical Power and Materials, Innovation Base of Energy and Chemical Materials for Graduate Students Training, Central South University, Changsha 410083, China.
Materials (Basel). 2020 Nov 19;13(22):5223. doi: 10.3390/ma13225223.
The traditional methods for preparing magnesium aluminum layered double hydrotalcite (MgAl-COLDHs) in industry include coprecipitation and hydrothermal methods. Both these methods have the disadvantages of high preparation cost and complicated water washing process. Using Mg(OH), Al(OH), and CO as raw materials in this work, the MgAl-CO LDHs are successfully prepared by mechanochemical method, which solves the shortcomings of traditional preparation method and realizes the conversion and utilization of CO resource. The prepared MgAl-CO LDHs are evaluated as a heat stabilizer in poly(vinyl chloride) (PVC). The result indicates that, when 2.4 phr MgAl-CO LDHs, 0.3 phr ZnSt, and 0.3 phr of zinc acetylacetonate are added to the PVC, the thermal stability time of PVC can reach 190 min, which is better than PVC containing commercial MgAl-CO LDHs. Meanwhile, its processing performance is basically the same as the PVC containing commercial MgAl-CO LDHs.
工业上制备镁铝层状双氢氧化物（MgAl-COLDHs）的传统方法包括共沉淀法和水热法。这两种方法都存在制备成本高和水洗过程复杂的缺点。本工作以Mg(OH)₂、Al(OH)₃和CO为原料，通过机械化学法成功制备了MgAl-CO LDHs，解决了传统制备方法的缺点，实现了CO资源的转化利用。将制备的MgAl-CO LDHs作为聚氯乙烯（PVC）的热稳定剂进行评价。结果表明，当向PVC中加入2.4 phr的MgAl-CO LDHs、0.3 phr的ZnSt和0.3 phr的乙酰丙酮锌时，PVC的热稳定时间可达190 min，优于含市售MgAl-CO LDHs的PVC。同时，其加工性能与含市售MgAl-CO LDHs的PVC基本相同。
