Nucleation effect of carboxylic acid modified alumina nanoparticles on polypropylene

JIANG Xiaofeng; ZHAO Shicheng; XIN Zhong

doi:10.11949/0438-1157.20190578

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Nucleation effect of carboxylic acid modified alumina nanoparticles on polypropylene

Material science and engineering\, nanotechnology | 更新时间：2026-07-24

- Nucleation effect of carboxylic acid modified alumina nanoparticles on polypropylene
- CIESC Journal Vol. 70, Issue 10, Pages: 4052-4061(2019)
- 作者机构：
  
  华东理工大学化工学院，化学工程联合国家重点实验室，上海 200237
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190578
  CLC： TQ 316.6
- Received：27 May 2019，
  
  Revised：2019-09-10，
  
  Online First：24 July 2026，
  
  Published：05 October 2019
- 稿件说明：
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蒋晓峰, 赵世成, 辛忠. 有机羧酸改性氧化铝纳米颗粒在聚丙烯中的成核效果研究[J]. 化工学报, 2019, 70(10): 4052-4061

JIANG Xiaofeng, ZHAO Shicheng, XIN Zhong. Nucleation effect of carboxylic acid modified alumina nanoparticles on polypropylene[J]. CIESC Journal, 2019, 70(10): 4052-4061
蒋晓峰, 赵世成, 辛忠. 有机羧酸改性氧化铝纳米颗粒在聚丙烯中的成核效果研究[J]. 化工学报, 2019, 70(10): 4052-4061 DOI： 10.11949/0438-1157.20190578.

JIANG Xiaofeng, ZHAO Shicheng, XIN Zhong. Nucleation effect of carboxylic acid modified alumina nanoparticles on polypropylene[J]. CIESC Journal, 2019, 70(10): 4052-4061 DOI： 10.11949/0438-1157.20190578.

摘要

利用正庚酸、硬脂酸、环己基甲酸和苯甲酸对氧化铝纳米粒子表面进行化学改性，研究了改性粒子表面的基团结构以及接枝量对其在聚丙烯(

PP)基体中成核效果的影响。结果表明：与直链烷基和环烷基羧酸相比，苯甲酸改性颗粒(BA-Al

)具有优异的成核效果，当BA-Al

的添加量为0.1%(质量)时，成核聚丙烯的结晶温度和弯曲模量相对于纯

PP分别提高了9.4℃和21.9%。改性纳米颗粒BA-Al

的苯甲酸接枝量对复合材料的结晶温度和力学性能也有重要影响，接枝量小于1.3 mmol/(g Al

)时，BA-Al

的成核效果随接枝量增加而显著增加；接枝量大于1.3 mmol/(g Al

)时，成核效果略微增加。所以，通过调控改性颗粒的表面结构，可以有效提升

PP复合材料的结晶和力学性能。

Abstract

A series of modified alumina (Al

) nanoparticles (NPs) were synthesized by grafting heptanoic acid

stearic acid

cyclohexanecarboxylic acid and benzoic acid onto Al

NPs. The effect of organic structures and grafting yield on the nucleation effect of modified NPs in isotactic polypropylene (

PP) matrix was investigated. The results show that the benzoic acid modified particles (BA-Al

) have excellent nucleation effect compared with linear alkyl and cycloalkyl carboxylic acids. The crystallization temperature and flexural modulus of nucleated

PP with 0.1% (mass) BA-Al

increase by 9.4℃ and 21.9% compared with that of virgin

respectively. The crystallization temperature and mechanical properties of composites are heavily affected by the grafting yield of the benzoic acid on the modified NPs BA-Al

. When the graftin

g yield is smaller than 1.3 mmol/(g Al

)

the nucleation effect of BA-Al

increases significantly with increasing grafting yield; however

when the grafting yield is higher than 1.3 mmol/(g Al

)

the nucleation effect increases slightly. By regulating the surface structures of modified NPs

it can effectively improve the crystallization behavior and mechanical properties of

PP.

关键词

Keywords

references

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