中国塑料 ›› 2021, Vol. 35 ›› Issue (4): 12-17.DOI: 10.19491/j.issn.1001-9278.2021.04.003

• 材料与性能 • 上一篇    下一篇

PAAS/PVA/Zn0.2Fe2.8O4磁性复合水凝胶的合成及其性能研究

吴首昂1, 涂征1, 刘北军1, 龚兴厚1,2()   

  1. 1.湖北省绿色轻工材料重点实验室,绿色轻质材料与加工协同创新中心,武汉 430068
    2.湖北工业大学材料与化学工程学院,武汉 430068
  • 收稿日期:2020-09-30 出版日期:2021-04-26 发布日期:2021-04-21

Synthesis and Properties of PAAS/PVA/Zn0.2Fe2.8O4 Magnetic Composite Hydrogels

WU Shouang1, TU Zheng1, LIU Beijun1, GONG Xinghou1,2()   

  1. 1.Hubei Provincial Key laboratory of Green Materials for Light Industry,Collaborative Innovation Center of Green Light?weight Materials and Processing,Wuhan 430068,China
    2.School of Materials and Chemical Engineering,Hubei University of Technology,Wuhan 430068,China
  • Received:2020-09-30 Online:2021-04-26 Published:2021-04-21
  • Contact: GONG Xinghou E-mail:508504665@qq.com

摘要:

以化学共沉淀法制备了在水中分散性良好的柠檬酸包覆的掺锌纳米四氧化三铁(Zn0.2Fe2.8O4,ZFO)粒子,并用X射线衍射仪、透射电子显微镜及综合物理特性测试仪进行测试。结果表明,该纳米粒子粒径为3~8 nm,粒径较为均一且饱和磁化强度可达60 emu/g,再通过在水相中引发丙烯酸钠聚合交联并结合冷冻解冻交联制得聚乙烯醇/聚丙烯酸钠/ZFO(PVA/PAAS/ZFO)互穿网络水凝胶;纳米ZFO粒子的引入可同时使水凝胶的拉伸强度提高约1.5倍; ZFO粒子的加入对水凝胶的热稳定性有一定的提高;纳米ZFO粒子的引入可加快水凝胶的电响应的速率和程度。

关键词: 聚丙烯酸钠, 聚乙烯醇, 掺锌纳米四氧化三铁, 电响应

Abstract:

The citric acid-coated zinc-doped nano?ferroferric oxide(Zn0.2Fe2.8O4,ZFO)nanoparticles with good dispersibility in water were prepared by a chemical coprecipitation method and then characterized by X-ray diffractometer, transmission electron microscope and comprehensive physical property tester. The results indicated that the nanoparticles presented a relatively uniform distribution with a particle size of 3~8 nm as well as saturation magnetization up to 60 emu/g. A new type of PVA/PAAS/ZFO interpenetrating network hydrogels were prepared through the initiates polymerization of sodium acrylate by crosslinking in the aqueous phase, followed by freezing and thawing cross-linking. It was found that the introduction of nano-ZFO particles increased the tensile strength of the hydrogels by about 1.5 times and also improved their thermal stability. Moreover, the addition of nano-ZFO particles accelerated the electrical response rate and strength of hydrogels.

Key words: sodium polyacrylate, polyvinyl alcohol, zinc-doped nano-ferroferric oxide, electrical response

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