The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of Polysiloxanes
Polymer–clay mineral composites are an important class of materials with various applications in the industry. Despite interesting properties of polysiloxanes, such matrices were rarely used in combination with clay minerals. Thus, for the first time, a systematic study was designed to investigate t...
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MDPI AG
2021-05-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/10/2623 |
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| author | Monika Wójcik-Bania Jakub Matusik |
| author_facet | Monika Wójcik-Bania Jakub Matusik |
| author_sort | Monika Wójcik-Bania |
| collection | DOAJ |
| description | Polymer–clay mineral composites are an important class of materials with various applications in the industry. Despite interesting properties of polysiloxanes, such matrices were rarely used in combination with clay minerals. Thus, for the first time, a systematic study was designed to investigate the cross-linking efficiency of polysiloxane networks in the presence of 2 wt % of organo-montmorillonite. Montmorillonite (Mt) was intercalated with six quaternary ammonium salts of the cation structure [(CH<sub>3</sub>)<sub>2</sub>R’NR]<sup>+</sup>, where R = C<sub>12</sub>, C<sub>14</sub>, C<sub>16</sub>, and R’ = methyl or benzyl substituent. The intercalation efficiency was examined by X-ray diffraction, CHN elemental analysis, and Fourier transform infrared (FTIR) spectroscopy. Textural studies have shown that the application of freezing in liquid nitrogen and freeze-drying after the intercalation increases the specific surface area and the total pore volume of organo-Mt. The polymer matrix was a poly(methylhydrosiloxane) cross-linked with two linear vinylsiloxanes of different siloxane chain lengths between end functional groups. X-ray diffraction and transmission electron microscopy studies have shown that the increase in d-spacing of organo-Mt and the benzyl substituent influence the degree of nanofillers’ exfoliation in the nanocomposites. The increase in the degree of organo-Mt exfoliation reduces the efficiency of hydrosilylation reaction monitored by FTIR. This was due to physical hindrance induced by exfoliated Mt particles. |
| first_indexed | 2024-03-10T11:20:07Z |
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| id | doaj.art-8660431f27b04f66bad6fb92eecd0440 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T11:20:07Z |
| publishDate | 2021-05-01 |
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| series | Materials |
| spelling | doaj.art-8660431f27b04f66bad6fb92eecd04402023-11-21T20:09:06ZengMDPI AGMaterials1996-19442021-05-011410262310.3390/ma14102623The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of PolysiloxanesMonika Wójcik-Bania0Jakub Matusik1Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, PolandFaculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, PolandPolymer–clay mineral composites are an important class of materials with various applications in the industry. Despite interesting properties of polysiloxanes, such matrices were rarely used in combination with clay minerals. Thus, for the first time, a systematic study was designed to investigate the cross-linking efficiency of polysiloxane networks in the presence of 2 wt % of organo-montmorillonite. Montmorillonite (Mt) was intercalated with six quaternary ammonium salts of the cation structure [(CH<sub>3</sub>)<sub>2</sub>R’NR]<sup>+</sup>, where R = C<sub>12</sub>, C<sub>14</sub>, C<sub>16</sub>, and R’ = methyl or benzyl substituent. The intercalation efficiency was examined by X-ray diffraction, CHN elemental analysis, and Fourier transform infrared (FTIR) spectroscopy. Textural studies have shown that the application of freezing in liquid nitrogen and freeze-drying after the intercalation increases the specific surface area and the total pore volume of organo-Mt. The polymer matrix was a poly(methylhydrosiloxane) cross-linked with two linear vinylsiloxanes of different siloxane chain lengths between end functional groups. X-ray diffraction and transmission electron microscopy studies have shown that the increase in d-spacing of organo-Mt and the benzyl substituent influence the degree of nanofillers’ exfoliation in the nanocomposites. The increase in the degree of organo-Mt exfoliation reduces the efficiency of hydrosilylation reaction monitored by FTIR. This was due to physical hindrance induced by exfoliated Mt particles.https://www.mdpi.com/1996-1944/14/10/2623organo-smectitemontmorillonitepolymer clay nanocompositespolysiloxanehydrosilylationquaternary ammonium salt |
| spellingShingle | Monika Wójcik-Bania Jakub Matusik The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of Polysiloxanes Materials organo-smectite montmorillonite polymer clay nanocomposites polysiloxane hydrosilylation quaternary ammonium salt |
| title | The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of Polysiloxanes |
| title_full | The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of Polysiloxanes |
| title_fullStr | The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of Polysiloxanes |
| title_full_unstemmed | The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of Polysiloxanes |
| title_short | The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of Polysiloxanes |
| title_sort | effect of surfactant modified montmorillonite on the cross linking efficiency of polysiloxanes |
| topic | organo-smectite montmorillonite polymer clay nanocomposites polysiloxane hydrosilylation quaternary ammonium salt |
| url | https://www.mdpi.com/1996-1944/14/10/2623 |
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