One-step synthesis of hydrophobic magnesium hydroxide nanoparticles and their application in flame-retardant polypropylene composites

doi:10.1016/j.cjche.2018.08.008

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (10): 2199-2205.DOI: 10.1016/j.cjche.2018.08.008

• Materials and Product Engineering • Previous Articles Next Articles

One-step synthesis of hydrophobic magnesium hydroxide nanoparticles and their application in flame-retardant polypropylene composites

Hongyan Shen, Youzhi Liu

Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, College of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China

Received:2018-05-26 Revised:2018-07-25 Online:2018-11-14 Published:2018-10-28
Contact: Youzhi Liu,E-mail address:liuyz@nuc.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China (21376229), the Science and Technology of Shanxi Province (2015031019-5), and the Natural Science Foundation for Young Scientists of Shanxi Province (2015021033).

One-step synthesis of hydrophobic magnesium hydroxide nanoparticles and their application in flame-retardant polypropylene composites

Hongyan Shen, Youzhi Liu

Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, College of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China

通讯作者: Youzhi Liu,E-mail address:liuyz@nuc.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (21376229), the Science and Technology of Shanxi Province (2015031019-5), and the Natural Science Foundation for Young Scientists of Shanxi Province (2015021033).

Abstract

Abstract: Hydrophobic magnesium hydroxide (MH) nanoparticles were prepared by a one-step synthesis method in a high-gravity environment generated by a novel impinging stream-rotating packed bed (IS-RPB) reactor. The reactant solutions were simultaneously and continuously pumped into the IS-RPB reactor, and then Tween 80 was added as a surface modifier. The morphology, structure, and properties of blank and hydrophobic MH were characterized. The effects of MH nanoparticles on the flame retardancy, thermal stability, and mechanical properties of PP/MH composites were also studied. We found that the obtained MH nanoparticles exhibited hexagonal lamella with a mean size of 30 nm, excellent hydrophobic properties (e.g., high water contact angle of 112°), and improved thermal stability of MH. The limiting oxygen index (LOI) further showed that increased MH loading can significantly improve flame-retardant performance, which reached 29.3% for PP/MH composites with 30 wt% hydrophobic samples. The thermal stability and mechanical properties of the PP/MH composites with hydrophobic samples were also much higher than those of PP/MH composites with blank MH. Results showed that the one-step synthesis had high potential application in the large-scale production of hydrophobic MH nanoparticles.

Key words: Magnesium hydroxide, Synthesis, Polypropylene, Hydrophobic property, Rotating packed bed

摘要： Hydrophobic magnesium hydroxide (MH) nanoparticles were prepared by a one-step synthesis method in a high-gravity environment generated by a novel impinging stream-rotating packed bed (IS-RPB) reactor. The reactant solutions were simultaneously and continuously pumped into the IS-RPB reactor, and then Tween 80 was added as a surface modifier. The morphology, structure, and properties of blank and hydrophobic MH were characterized. The effects of MH nanoparticles on the flame retardancy, thermal stability, and mechanical properties of PP/MH composites were also studied. We found that the obtained MH nanoparticles exhibited hexagonal lamella with a mean size of 30 nm, excellent hydrophobic properties (e.g., high water contact angle of 112°), and improved thermal stability of MH. The limiting oxygen index (LOI) further showed that increased MH loading can significantly improve flame-retardant performance, which reached 29.3% for PP/MH composites with 30 wt% hydrophobic samples. The thermal stability and mechanical properties of the PP/MH composites with hydrophobic samples were also much higher than those of PP/MH composites with blank MH. Results showed that the one-step synthesis had high potential application in the large-scale production of hydrophobic MH nanoparticles.

关键词: Magnesium hydroxide, Synthesis, Polypropylene, Hydrophobic property, Rotating packed bed

Hongyan Shen, Youzhi Liu. One-step synthesis of hydrophobic magnesium hydroxide nanoparticles and their application in flame-retardant polypropylene composites[J]. Chin.J.Chem.Eng., 2018, 26(10): 2199-2205.

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One-step synthesis of hydrophobic magnesium hydroxide nanoparticles and their application in flame-retardant polypropylene composites

One-step synthesis of hydrophobic magnesium hydroxide nanoparticles and their application in flame-retardant polypropylene composites

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