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The preparation of hydrophobic alginate-based fibrous aerogel and its oil absorption property

  • Original Paper: Sol-gel and hybrid materials with surface modification for applications
  • Published:
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Abstract

In order to obtain hydrophobic alginate-based fibrous aerogel, sodium alginate (SA) and acrylamide (AM) as raw materials, methyltrimethoxysilane (MTMS) as surface modification agent. And, hydrophobic alginate-based fibrous aerogel was prepared by soaking sodium alginate / polyacrylamide (PAM) composite hydrogel with methyltrimethoxysilane / ethyl orthosilicate (TEOS) / ethanol mixture. The samples were systematically characterized by SEM, FT-IR, DSC, and so on. The results manifested that the hydrophobic groups successfully introduced into the aerogel, made aerogel possess hydrophobicity, Ca2+ was uniformly dispersed in the aerogel by Ca2+ slow-release crosslinking method. The prepared aerogel showed macroporous and mesoporous microstructure. The bulk density was 0.026 g/cm3, specific surface area was 80 m2/g, the average mesoporous size was 13.18 nm, the average macropore size was 2.25 µm, the total pore area was 39 m2/g, the porosity was 95.6% and the single point total pore volume was 0.528 cm3/g. The hydrophobic alginate-based fibrous aerogel had excellent oil absorption, the adsorption capacity was 65 times as much as its own weight.

Highlights

  • Modified alginate-based fibrous aerogel has remarkable oil absorption.

  • The aerogel prepared by Ca2+ slow-release crosslinking method has a uniform pore structure.

  • Modified alginate-based fibrous aerogel is hydrophobic.

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Acknowledgements

We thank Prof. Hong Zhang and all the people involved in the study. This research was financially supported by Liaoning Provincial Institute of Advanced Industrial Science and Technology major projects.

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Liaoning Provincial Institute of Advanced Industrial Science and Technology major projects.

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Authors and Affiliations

  1. Dalian Polytechnic University, Dalian, 116034, China

    Chihan Meng, Hong Zhang, Sen Zhang, Jing Guo & Xinquan Zou

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  1. Chihan Meng
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  2. Hong Zhang
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  3. Sen Zhang
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  4. Jing Guo
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  5. Xinquan Zou
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Correspondence to Hong Zhang.

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Meng, C., Zhang, H., Zhang, S. et al. The preparation of hydrophobic alginate-based fibrous aerogel and its oil absorption property. J Sol-Gel Sci Technol 87, 704–712 (2018). https://doi.org/10.1007/s10971-018-4748-1

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  • DOI: https://doi.org/10.1007/s10971-018-4748-1

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