Amino catalysts in the synthesis of cross-linked silicone diclofenac-containing composites

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Abstract

Low molecular mono- and diamines (3-aminopropyltriethoxysilane, hexamethylenediamine, 1,4-diaminobutane), and high molecular weight polydimethylsiloxane with terminal amine groups were studied as catalysts in the synthesis of cross-linked composite films based on polydimethylsiloxane with terminal hydroxyl groups, tetraethoxysilane a cross-linking agent and containing sodium diclofenac as a physiologically active compound. Polyethylene glycol PEG200 was used as a hydrophilizing component for the hydrophobic silicone matrix. The chemical structure of amine catalysts and polyethylene glycol presence have significant effect on structure and properties of the composites, thereby determining the kinetics and degree of prolonged release of diclofenac from the films.

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About the authors

Z. M. Farmazyan

Scientific and Technological Centre of Organic and Pharmaceutical Chemistry of the National Academy of Sciences of the Republic of Armenia

Email: grigstepan@yahoo.com
ORCID iD: 0000-0001-9841-5586

Institute of Fine Organic Chemistry named after A. L. Mnjoyan

Armenia, Yerevan, 0014

M. L. Atabekyan

Scientific and Technological Centre of Organic and Pharmaceutical Chemistry of the National Academy of Sciences of the Republic of Armenia

Email: grigstepan@yahoo.com
ORCID iD: 0000-0002-5265-5469

Institute of Fine Organic Chemistry named after A. L. Mnjoyan

Armenia, Yerevan, 0014

E. A. Akobyan

Scientific and Technological Centre of Organic and Pharmaceutical Chemistry of the National Academy of Sciences of the Republic of Armenia

Email: grigstepan@yahoo.com
ORCID iD: 0000-0003-2409-1894

Institute of Fine Organic Chemistry named after A. L. Mnjoyan

Armenia, Yerevan, 0014

V. O. Topuzyan

Scientific and Technological Centre of Organic and Pharmaceutical Chemistry of the National Academy of Sciences of the Republic of Armenia

Email: grigstepan@yahoo.com
ORCID iD: 0000-0002-1721-1993

Institute of Fine Organic Chemistry named after A. L. Mnjoyan

Armenia, Yerevan, 0014

E. R. Arakelova

National Polytechnic University of Armenia

Email: grigstepan@yahoo.com
ORCID iD: 0000-0001-6640-8998
Armenia, Yerevan, 0009

S. L. Grigoryan

National Polytechnic University of Armenia

Email: grigstepan@yahoo.com
ORCID iD: 0000-0001-6342-4060
Armenia, Yerevan, 0009

S. G. Grigoryan

Scientific and Technological Centre of Organic and Pharmaceutical Chemistry of the National Academy of Sciences of the Republic of Armenia

Author for correspondence.
Email: grigstepan@yahoo.com
ORCID iD: 0000-0002-7193-9803

Institute of Fine Organic Chemistry named after A. L. Mnjoyan

Armenia, Yerevan, 0014

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Supplementary files

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2. Fig. 1. Kinetic curves of diclofenac sodium release and the degree of swelling of bulk samples A (a, b) and B (c, d). a, b: 1 – A-APT, 2 – A-HMDA, 3 – A-PDS, 4 – A-DAB; c, d: 1 – B-APT, 2 – B-HMDA, 3 – B-PDS, 4 – B-DAB.

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3. Fig. 2. Kinetic curves of diclofenac sodium release (a) and film swelling (b) depending on the type of catalyst and the amount of PEG200. 1 – G-HMDA, 2 – G-DAB, 3 – B-PDS, 4 – B-DAB, 5 – B-HMDA, 6 – B-APT.

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4. Fig. 3. Micrographs of the surface of B-APT film containing sodium diclofenac and ~11% polyethyleneglycol. The film was obtained from PDMS-OH and TEOS in the presence of APTES catalyst.

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5. Fig. 4. IR spectra of APTES (1), sodium diclofenac (2) and their mixture (3).

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6. Fig. 5. Diffraction patterns of sodium diclofenac (1) and B-APT film containing ~11% PEG200. The film was obtained by the interaction of PDMS-OH and TEOS in the presence of APTES catalyst.

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7. Fig. 6. Micrographs of the surface of B-PDS film containing sodium diclofenac and ~11% PEG200. The film was obtained by the interaction of PDMS-OH and TEOS in the presence of PDMS-NH2 catalyst.

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8. Fig. 7. Micrographs of the surface of B-HMDA film containing sodium diclofenac and ~11% polyethyleneglycol. The film was obtained by the interaction of PDMS-OH and TEOS in the presence of HMDA catalyst.

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9. Fig. 8. Micrographs of the surface of the HMDA film containing sodium diclofenac and ~20% PEG200. The film was obtained by the interaction of PDMS-OH and TEOS in the presence of the HMDA catalyst.

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10. Fig. 9. Diffraction patterns of hexamethylenediamine (1), sodium diclofenac (2), B-HMDA film (3, 11% PEG200), G-HMDA film (4, 20% PEG200).

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11. Fig. 10. IR spectra of HMDA (1), sodium diclofenac (2) and their mixture (3).

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12. Fig. 11. IR spectra of PEG200 (1), sodium diclofenac (2) and their mixture (3).

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13. Scheme 1.

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14. Scheme 2.

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15. Scheme 3.

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