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| Description
| - The trend of the last few years in the area of polyurethane chemistry is partial or complete replacement of petrochemical polyols with polyols based on natural oils. However, introduction of flexible fatty acid chains into polyurethanes materials usually reflects in partial deterioration of the product properties. A dramatic improvement of the desired properties can be achieved if the oil polyols are used in combination of suitable nanoparticles. Selection of the right type of nanoparticles, their surface modification and proper dispersion are crucial conditions important for reaching the targeted enhancement of polymer networks properties. In our work we showed that the most significant improvement of properties of polyurethanes based on oil polyols can be obtained using montmorillonite nanoparticles.1,2 In order to improve the compatibility of the montmorillonite nanoparticles with the oil polyols we decided to surface modify the clay particles with methylesters of hydroxyfunctional fatty acids. Such type of surface modification tailored to oil polyols is not commercially available and can essentially affect the quality of montmorillonite dispersion in oil polyol. Since the modification of clay particles with methylesters of hydroxyfunctional fatty acids is applying conventional synthesis procedures complicated we proposed two steps process based on chemo-enzymatic catalysis. In the first step we pre-modified the montmorillonite plates with dimethylethanol amine (DMEA) by ion exchange reaction. In the second step we studied the efficiency of enzymatically catalyzed condensation of methylesters of ricinoleic acids with primary hydroxyl groups of DMEA.
- The trend of the last few years in the area of polyurethane chemistry is partial or complete replacement of petrochemical polyols with polyols based on natural oils. However, introduction of flexible fatty acid chains into polyurethanes materials usually reflects in partial deterioration of the product properties. A dramatic improvement of the desired properties can be achieved if the oil polyols are used in combination of suitable nanoparticles. Selection of the right type of nanoparticles, their surface modification and proper dispersion are crucial conditions important for reaching the targeted enhancement of polymer networks properties. In our work we showed that the most significant improvement of properties of polyurethanes based on oil polyols can be obtained using montmorillonite nanoparticles.1,2 In order to improve the compatibility of the montmorillonite nanoparticles with the oil polyols we decided to surface modify the clay particles with methylesters of hydroxyfunctional fatty acids. Such type of surface modification tailored to oil polyols is not commercially available and can essentially affect the quality of montmorillonite dispersion in oil polyol. Since the modification of clay particles with methylesters of hydroxyfunctional fatty acids is applying conventional synthesis procedures complicated we proposed two steps process based on chemo-enzymatic catalysis. In the first step we pre-modified the montmorillonite plates with dimethylethanol amine (DMEA) by ion exchange reaction. In the second step we studied the efficiency of enzymatically catalyzed condensation of methylesters of ricinoleic acids with primary hydroxyl groups of DMEA. (en)
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| Title
| - Enzyme catalyzed modification of montmorillonite nanoparticles using fatty acid derivatives
- Enzyme catalyzed modification of montmorillonite nanoparticles using fatty acid derivatives (en)
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| skos:prefLabel
| - Enzyme catalyzed modification of montmorillonite nanoparticles using fatty acid derivatives
- Enzyme catalyzed modification of montmorillonite nanoparticles using fatty acid derivatives (en)
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| skos:notation
| - RIV/46504711:_____/10:#0000258!RIV12-MPO-46504711
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/46504711:_____/10:#0000258
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - nanoparticles, montmorillonite, enzyme, lipase, catalysis, fatty acids (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...ocetUcastnikuAkce
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| http://linked.open...nichUcastnikuAkce
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/statKonaniAkce
| |
| http://linked.open...iv/tvurceVysledku
| - Zelenka, Jiří
- Vlček, Tomáš
|
| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/ukonceniAkce
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| http://linked.open.../riv/zahajeniAkce
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