[1] Liu Xunjun, Zhang Yuchao, Wang Juan, Lei Lixu, et al. Synthesis and characterization of colored layered double hydroxidesfor thermal stabilizer [J]. Journal of Southeast University (English Edition), 2015, 31 (4): 566-571. [doi:10.3969/j.issn.1003-7985.2015.04.023]

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Synthesis and characterization of colored layered double hydroxidesfor thermal stabilizer()

用作热稳定剂的有色层状氢氧化物的合成与表征

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

31

Issue:

2015 4

Page:

566-571

Research Field:

Chemistry and Chemical Engineering

Publishing date:

2015-12-30

Info

Title:

Synthesis and characterization of colored layered double hydroxidesfor thermal stabilizer

用作热稳定剂的有色层状氢氧化物的合成与表征

Author(s):

Liu Xunjun, Zhang Yuchao, Wang Juan, Lei Lixu

School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China

刘循军, 张玉超, 王娟, 雷立旭

东南大学化学化工学院, 南京211189

Keywords:

colored layered double hydroxides;  magnesium hydroxide;  ferric chloride;  chromic chloride;  thermal stabilizer;  polyvinyl chloride

有色层状氢氧化物;  氢氧化镁;  氯化铁;  氯化铬;  热稳定剂;  聚氯乙烯

PACS:

TQ047

DOI:

10.3969/j.issn.1003-7985.2015.04.023

Abstract:

Colored layered double hydroxides(LDHs)can be synthesized by introducing colored cations such as Fe³⁺ and Cr³⁺, which can be used as thermal stabilizers for polyvinyl chloride(PVC). The yellowish Mg/Fe and bluish Mg/Cr LDHs are prepared by the co-precipitation method. The results show that the Mg₃Cr_-CO₃ and Mg₃Fe_-CO₃ colored layered double hydroxides can stabilize PVC for more than 30 min under the thermal aging temperature of 180 ℃. The preparation can use cheap Mg(OH)₂ instead of MgCl₂, which produces a much smaller amount of the by-product NH₄Cl. It is known that NH₄Cl is a cheap fertilizer that is difficult to sell; therefore, the preparation is much greener and more economic than the one using magnesium salt.

通过引入Fe³⁺、Cr³⁺等有色金属阳离子可以得到有色层状氢氧化物, 该有色层状氢氧化物可用作聚氯乙烯热稳定剂.通过共沉淀法分别制备了浅黄色的Mg/Fe层状氢氧化物和浅蓝色的Mg/Cr层状氢氧化物.研究结果表明, 在180 ℃热老化温度下, Mg₃Cr_-CO₃和Mg₃Fe_-CO₃层状氢氧化物可使聚氯乙烯塑料保持稳定超过30 min.研究发现实验采用氢氧化镁代替可溶性的镁盐, 例如六水合氯化镁等, 可以大幅减少副产物氯化物的生成.由于氯化铵是一种廉价的化肥且难以处理, 因此, 与采用镁盐的制备方法相比, 所提的制备方法更为绿色经济环保.

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Memo

Memo:

Biographies: Liu Xunjun(1988—), male, graduate; Lei Lixu(corresponding author), male, doctor, professor, lixu.lei@seu.edu.cn.
Foundation items: The Fundamental Research Funds for the Central Universities, the Scientific Innovation Research of College Graduates in Jiangsu Province(No.CXLX12_-0105), the Analysis and Test Fund of Southeast University(No.201226).
Citation: Liu Xunjun, Zhang Yuchao, Wang Juan, et al.Synthesis and characterization of colored layered double hydroxides for thermal stabilizer[J].Journal of Southeast University(English Edition), 2015, 31(4):566-571.[doi:10.3969/j.issn.1003-7985.2015.04.023]

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