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International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
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T1: O–5
Thermosensitive chitosan lactate gels with graphene oxide
Katarzyna Pieklarz
1
, Zofia Modrzejewska
1
, and Michał Tylman
2
1
Department of Environmental Engineering, Faculty of Process and Environmental Engineering,
Lodz University of Technology, Poland, e-mail: katarzyna.pieklarz@dokt.p.lodz.pl
2
Department of Process Thermodynamics, Faculty of Process and Environmental Engineering, Lodz
University of Technology, Poland
Studies on the composites containing carbon nanostructures applied in biomedical
engineering are currently a priority. An analysis of the literature shows that the introduction of
graphene in the chitosan composites is very promising [1, 2]. Chitosan thermosensitive gels
containing graphene oxide are now in the initial stage of research.
In the article the thermosensitive chitosan lactate gel structure was presented based on the
FTIR spectroscopy – Fig. 1. and observations under the scanning electron microscopy (SEM) –
Fig. 2.
Fig. 1. FTIR spectra of chitosan lactate hydrogels.
Fig. 2. A - SEM image of pure chitosan lactate hydrogel;
B - SEM image of chitosan lactate hydrogel containing GO.
Keywords: hydrogel; chitosan; graphene oxide
References
[1] S. Kumar, K. Chatterjee, ACS Appl. Mater. Interfaces. 40 (2016) 26431–26457.
[2] P. Yu, R-Y. Bao, X-J. Shi, W. Yang, M-B. Yang. Carbohydrate Polymers. 155 (2017) 507.
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International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
48
T1: O–6
Spectroscopic studies of the silicone oil influence on the hydrophilic
intraocular lenses
Kordian Chamerski
1
, Jacek Filipecki
1
, Magdalena Leśniak
2
,
Piotr Jeleń
2
, Maciej Sitarz
2
, and Marcin Stopa
3,4
1
Institute of Physics, Faculty of Mathematics and Natural Sciences, Jan Dlugosz University
in Czestochowa, Al. Armii Krajowej 13/15, 42-200 Czestochowa, Poland,
e-mail: kordian.chamerski@ajd.czest.pl
2
Faculty of Materials Science and Ceramics, AGH University of Science and Technology,
Al. Mickiewicza 30, 30-059 Cracow, Poland
3
Department of Optometry and Biology of Visual System, Poznan University of Medical Sciences,
ul. Rokietnicka 5D, 60-806 Poznań, Poland
4
Clinical Eye Unit and Pediatric Ophthalmology Service, Heliodor Swiecicki University Hospital,
Poznan University of Medical Sciences, Poznań, Poland
Silicone oil based on polydimethylsiloxane (PDMS) is commonly used material in
vitreoretinal surgery for treatment of retinal detachment [1]. Tamponade made from silicone oil
remains in patients eyes for the time lasting up to six months, having the contact with internal
tissues of eyeball. In the case of PDMS oil injection into the eyeball with intraocular lens (IOL)
such a contact could exist between oil and the artificial implant. Hitherto, the irreversible
adhesion of PDMS oil to the surface of IOLs was observed [2], what leads to real problems with
sight acuity [3]. Furthermore, the calcification of hydrophilic implants was combined with
application of the PDMS oil [4], and explained by the possibility of bonds creation between
silicone oil and calcium phosphates at the implant surface [5]. If the calcification of IOL surface
can be connected with PDMS oil adhesion to the implant then calcification of the internal
structure of the IOL should be combined with silicone oil absorption by internal structure of
implant.
Presented study was conducted in order to determine the time dependent influence of PDMS
oil on two kinds of IOLs. In previous study, the absorption of silicone oil into internal structure
of hydrophilic IOLs was assumed on the basis of PALS and FTIR measurements [6]. The same
hydrophilic IOLs, containing poly 2-hydroxyethyl methacrylate (PHEMA) hydrogel, and one
more kind of lenses based on hydroxyethyl (HEMA) – polyethylene glycol phenyl ether acrylate
(poly(EG)PEA) – styrene copolymer, crosslinked with ethylene glycol dimethacrylate
(EGDMA) were studied this time. In the first step, six lenses of every kind were divided into
pairs and put into the silicone oil for 1, 3 and 6 months incubation in 37°C of temperature. After
incubation the samples were measured by PALS and FTIR methods firstly and then cleaned up
by means of acetone to remove the silicone oil from the implants surfaces. After cleaning the
samples were measured again. Based on the research, it was noted that silicone oil is not
absorbed by internal structure of samples and its interaction comes down only to the interactions
at the implants surfaces.
Keywords: silicone oil; intraocular lenses; PALS; FTIR
References
[1] T.H. Williamson, Vitreoretinal Surgery, Springer, Berlin 2013.
[2] F. Hakan Öner, O.A. Saatci, S. Sarioglu, I. Durak, S. Kaynak, M. Çabuk, Ophthalmologica 217 (2003)
124.
[3] D.J. Apple, R.T. Isaacs, D.G. Kent, L.M. Martinez, S. Kim, S.G. Thomas, S. Basti, D. Barker, Q.
Peng, J. Cataract. Refract. Surg. 23 (1997) 536.
[4] S.P. Gartaganis, P. Prahs, E.D. Lazari, P.S. Gartaganis, H. Helbig, P.G. Koutsoukos, Am. J.
Ophthalmol. 168 (2016) 68.
[5] X. Guan, R. Tang, G.H. Nancollas, J. Biomed. Mater. Res. A 71 (2004) 488.
[6] K. Chamerski, M. Leśniak, M. Sitarz, M. Stopa, J. Filipecki, Spectrochim. Acta A 167 (2016) 96.
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