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Application of Silica Aerogel Carrier via Supercritical Drying for Fragrance Controlled-release

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Abstract

Silica aerogel with different hydrophilicities were prepared from tetramethoxysilane, Methymethoxysilane, tetramethoxysilane-propyltrimethoxysilane, or tetramethoxysilane-phenyltrimethoxysilane mixtures via supercritical drying process (labelled as TMOS-AG Me-TMOS-AG, Pr-TMOS-AG, or Ph-TMOS-AG, respectively). Three fragrances, including geraniol, ethyl vanillin, and menthol, were loaded to TMOS-AG. The thermal analysis confirmed all loading fragrances are stable until over 200 °C. And among all fragrances, geraniol presented the maximum loading contents (Lm). Concentration dependences indicated the geraniol was mono layer absorbed. Py-GC/MS of geraniol in TMOS-AG under both N2 and mimic air atmosphere (90% N2 and 10% O2) confirmed that loaded geraniol could be thermally controlled-released beginning at 200 °C. As N2 absorption confirmed, even absorption/desorption equilibrium constant (k) was determined mainly by hydrophilicity of silica aerogels, and the maximum loading contents (Lm) were influenced more by the pore size. Due to mono layered absorption, bigger pores usually give less specific areas and less absorbing sites for geraniol, and then present lower Lm.

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Authors and Affiliations

  1. China Tobacco Hubei Industrial Co., Ltd, Wuhan, 430040, China

    Long Huang  (黄龙), Jing Zhang, Denghong Pang & Chenghao Luo  (罗诚浩)

  2. School of Power & Mechanical Engineering, Wuhan University, Wuhan, 430072, China

    Man Xiong, Xuan Bie, Yawei Dong, Ben Wang & Ronghua Huang  (黄荣华)

  3. School of Materials Science and Engineering, Hubei University, Wuhan, 430060, China

    Man Xiong

Authors
  1. Long Huang  (黄龙)
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  2. Jing Zhang
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  3. Denghong Pang
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  4. Man Xiong
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  5. Xuan Bie
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  6. Yawei Dong
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  7. Ben Wang
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  8. Chenghao Luo  (罗诚浩)
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  9. Ronghua Huang  (黄荣华)
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Correspondence to Chenghao Luo  (罗诚浩) or Ronghua Huang  (黄荣华).

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All authors declare that there are no competing interests.

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Huang, L., Zhang, J., Pang, D. et al. Application of Silica Aerogel Carrier via Supercritical Drying for Fragrance Controlled-release. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 38, 807–814 (2023). https://doi.org/10.1007/s11595-023-2763-8

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  • DOI: https://doi.org/10.1007/s11595-023-2763-8

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