Article
  • Effect on the Antioxidant Capacity of Polypropylene by Vanillin: A Natural Antioxidant Extracted from Cotton Stalk Lignin
  • Mingyu He, Han Dong, and Mamatjan Yimit

  • Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemical Engineering, Xinjiang University, Urumchi 830046, China

  • Vanillin의 Polypropylene 항산화 효과 연구: Cotton Stalk Lignin 추출 천연 항산화제
  • Reproduction, stored in a retrieval system, or transmitted in any form of any part of this publication is permitted only by written permission from the Polymer Society of Korea.

Abstract

Vanillin (VA) was extracted from cotton stalk lignin by UV photocatalysis method using Co2+/Ni2+ as a catalyst, the yield of which was quantitative analyzed through gas chromatography-mass spectrometer and high performance liquid chromatography. The structure and thermal properties were compared between extracted and standard VA, which showed basically consistent. PP/VA materials characterized by fourier transform infrared spectroscopy were prepared by melt intercalation and subjected to 20 days thermal oxygen aging. Thermal gravimetric analysis and oxidation induction time results showed VA (0.9 wt%) could improve the thermal stability of polypropylene (PP) by 33.4 ℃ and 49.03%. Differential scanning calorimetry confirmed that VA increased the crystallinity of PP reaching to 15.70%. After 20 days aging, mechanical test showed the impact strength and breaking elongation retention of PV-3 (0.9 wt%) were 10.0% and 14.8% higher than those of PP; surface scanning electron microscopy showed that PV-3 had the most smooth surface.


Keywords: vanillin, UV photocatalysis, polypropylene, antioxidant capacity, mechanical properties.

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2018 Impact Factor : 0.500
  • Indexed in SCIE

This Article

  • 2021; 45(5): 717-726

    Published online Sep 25, 2021

  • 10.7317/pk.2021.45.5.717
  • Received on Mar 26, 2021
  • Revised on Jun 15, 2021
  • Accepted on Jun 21, 2021

Correspondence to

  • Mamatjan Yimit
  • Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, College of Chemical Engineering, Xinjiang University, Urumchi 830046, China

  • E-mail: mjan10@xju.edu.cn