Abstract
In this study carboxymethyl cellulose (CMC) reinforced by silica at concentrations from 2 to 15(w/w) have been prepared to investigate the optimal physicochemical properties. The morphological structural and thermal properties of the CMC/ZnO-silica nanobiomaterials were studied to analyze size-dependent interfacial properties and reactivity. X-ray diffraction (XRD) technique was used to characterize the crystallographic structure of the nano- biomaterial. XRD results showed that the silica and ZnO were homogenously dispersed in the CMC matrix. Scanning electron microscopy (SEM) was used to evaluate the ZnO nano particle settlement on silica surface. The thermal stability of CMC and the novel nano-biomaterial was investigated by thermal gravimetric analysis (TGA). The thermal stability of the nano-material was improved systematically with increasing amounts of silica, up to a loading of 10 wt %. The hardness and the elastic modulus were gradually enhanced with increasing silica concentration.
Keywords
References
- Derfus, A. M., Chan, W. C. W. & Bhatia, S. N. Probing the cytotoxicity of semiconductor quantum dots. Nano Lett. 4, 11–18 (2004).
- Auffan, M., Rose, J., Wiesner, M. R. & Bottero, J. Y. Chemical stability of metallic nanoparticles: a parameter controlling their potential toxicity in vitro. Environ. Pollut. 157, 1127–1133 (2009)
- Brunner, T. J. et al. In vitro cytotoxicity of oxide nanoparticles: comparison to asbestos, silica, and the effect of particle solubility. Environ. Sci. Technol. 40, 4374–4381 (2006).
- Franklin, N. M. et al. Comparative toxicity of nanoparticulate ZnO, bulk ZnO, and ZnCl2 to a freshwater microalga (Pseudokirchneriella subcapitata): the importance of particle solubility. Environ. Sci. Technol. 41, 8484–8490 (2007).
CMC / SİLİKA YÜZEYİNDE ZnO NANOTANECİKLERİNİN DAĞILIMI İLE YENİ BIR NANO-BİYOMALZEMENİN HAZIRLANMASI
Abstract
Bu çalısmada, silika konsantrasyonu ağırlıkça 2 ile 15(w/w) arası olacak sekilde
karboksimetil selüloz (CMC)’a eklenip optimum fizikokimyasal özellikleri incelenmek üzere hazırlanmıstır. CMC/ZnO-silika nano-biyomateryallerin morfolojik ve termal özellikleri, boyuta bağlı reaktivite ve arayüzey özelliklerini açıklamak için çalısıldı.Nanobiyomalzemenin Kristal yapısının incelenmesinde X ısını difraksiyonu (XRD) tekniği kullanıldı. XRD sonuçları , silika ve ZnO’nun CMC matriks içerisinde homojen bir sekilde dağıldığını gösterdi. Silika yüzeyindeki ZnO naotaneciklerinin yerlesiminin hesaplanmasında Taramalı Elektron Mikroskobu (SEM) kullanıldı. CMC ve yeni nanobiyomalzemenin termal kararlılığı Termal Gravimetrik Analiz (TGA) ile incelendi. Nanomateryalin termal kararlılığı, silika miktarının ağırlıkça %10 a varan yüklemesinin artmasıyla ile sistematik olarak arttırıldı. Sertlik ve elastik modülleri artan silika konsantrasyonu ile arttırıldı.
Keywords
References
- Derfus, A. M., Chan, W. C. W. & Bhatia, S. N. Probing the cytotoxicity of semiconductor quantum dots. Nano Lett. 4, 11–18 (2004).
- Auffan, M., Rose, J., Wiesner, M. R. & Bottero, J. Y. Chemical stability of metallic nanoparticles: a parameter controlling their potential toxicity in vitro. Environ. Pollut. 157, 1127–1133 (2009)
- Brunner, T. J. et al. In vitro cytotoxicity of oxide nanoparticles: comparison to asbestos, silica, and the effect of particle solubility. Environ. Sci. Technol. 40, 4374–4381 (2006).
- Franklin, N. M. et al. Comparative toxicity of nanoparticulate ZnO, bulk ZnO, and ZnCl2 to a freshwater microalga (Pseudokirchneriella subcapitata): the importance of particle solubility. Environ. Sci. Technol. 41, 8484–8490 (2007).
Details
| Primary Language | English |
|---|---|
| Journal Section | MEETING ABSTRACTS |
| Authors | |
| Publication Date | January 30, 2015 |
| Submission Date | January 27, 2015 |
| Published in Issue | Year 2015 Volume: 2 Issue: 2 |
