Journal of South China University of Technology (Natural Science Edition) ›› 2021, Vol. 49 ›› Issue (9): 80-87.doi: 10.12141/j.issn.1000-565X.200656

Special Issue: 2021年材料科学与技术

• Materials Science & Technology • Previous Articles     Next Articles

PTC Materials with Low Curie Temperature Point Based on Waterborne Acrylic Resin Matrix

LI Jing1,2 HAN Shumei1 LI Wenjun3 DUAN Shiyu1   

  1. 1.School of Chemistry and Chemical Engineering，South China University of Technology， Guangzhou 510640，Guangdong，
    China；2.SCUT-Zhuhai Modern Industrial Innovation，Zhuhai 519000，Guangdong，China；3.Beijing Institute of Spacecraft 
    System Engineering，Beijing 100086，China
  • Received:2020-11-02 Revised:2021-01-08 Online:2021-09-25 Published:2021-09-01
  • Contact: 李静（1966-），女，博士，教授，主要从事功能复合材料的研究。 E-mail:ljing@scut.edu.cn
  • About author:李静（1966-），女，博士，教授，主要从事功能复合材料的研究。
  • Supported by:
    Supported by the Civil Space Technology Pre-Research Program During the “13th Five-Year Plan” of the Bureau of Science, Technology and Industry, the Ministry of National Defence (A2180150)

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Abstract: Conductive polymer composites （CPCs） with positive temperature coefficient （PTC） have many applications in self-regulating heating fields.However，current researches on CPCs are mainly concentrated in the high temperature region，and few reports are concerned on low temperature segment.This study proposed a method of making a low Curie temperature point PTC material with water-based acrylic resin as matrix，and discussed the effects of temperature-controlled materials and different proportions of conductive fillers on Curie temperature.By adding Ni powder into the copolymer of water-borne acrylic resin and organic acid crystal，the PTC materials with low initial resistance and a Curie temperature point near the melting point of organic acid crystal were obtained.The Curie temperature point of the material can be adjusted within a certain range by regulating the proportion of Ni powder.Results show that，when the mass fraction of Ni powder is 30%，the initial resistivity of the material can reach 1.96Ω·cm，and the PTC intensity can exceed 6.Heating test results show that the heating capacity and electrical properties of the materials have no significant change after the thermal cycle，indicating good repeatability.

Key words: PTC materials, conductive polymer composites, temperature-controlled heating, low Curie temperature point, PTC effect, PTC intensity

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