Porosity and Surface Properites of SBA-15 with Grafted PNIPAAM: A Water Sorption Calorimetry Study
作者： N. V. Reichhardt , T. Nylander , B. Klösgen , V. Alfredsson , V. Kocherbitov
DOI: 10.1021/LA203093U
关键词:
摘要: Mesoporous silica SBA-15 was modified in a three-step process to obtain material with poly-N-isopropylacrylamide (PNIPAAM) grafted onto the inner pore surface. Water sorption calorimetry implemented characterize materials obtained after each step regarding porosity and surface properties. The modification carried out by (i) increasing number of silanol groups, (ii) grafting 1-(trichlorosilyl)-2-(m-/p-(chloromethylphenyl) ethane, acting as an anchor for (iii) polymerization N-isopropylacrylamide. isotherms enthalpy hydration are presented. Pore size distributions were calculated on basis water applying BJH model. Complementary measurements nitrogen small-angle X-ray diffraction increase groups occurs mainly intrawall pores, is located volume absent PNIPAAM. Hence, PNIPAAM seals off pores. directly detect presence porosity. can be from isotherms. Furthermore, technique provides information capability (i.e., wettability different chemical surfaces) thermodynamic information.
acs.org
sci-hub.se 参考文章(54)
B. De Witte, K. Vercruysse, K. Aernouts, P. Verwimp, J. B. Uytterhoeven, N2-adsorption on amorphous aluminosilicates: Application of the Kelvin equation and the T-plot analysis for mixed micro-mesoporous materials Journal of Porous Materials. ,vol. 2, pp. 307- 313 ,(1996) , 10.1007/BF00489812
Hua Zou, Shishan Wu, Jian Shen, Polymer/Silica Nanocomposites: Preparation, Characterization, Properties, and Applications Chemical Reviews. ,vol. 108, pp. 3893- 3957 ,(2008) , 10.1021/CR068035Q
Igor Medveď, Robert Černý, Surface diffusion in porous media: A critical review Microporous and Mesoporous Materials. ,vol. 142, pp. 405- 422 ,(2011) , 10.1016/J.MICROMESO.2011.01.015
Jessica M. Rosenholm, Cecilia Sahlgren, Mika Lindén, Towards multifunctional, targeted drug delivery systems using mesoporous silica nanoparticles – opportunities & challenges Nanoscale. ,vol. 2, pp. 1870- 1883 ,(2010) , 10.1039/C0NR00156B
A. Stein, B. J. Melde, R. C. Schroden, Hybrid Inorganic–Organic Mesoporous Silicates—Nanoscopic Reactors Coming of Age Advanced Materials. ,vol. 12, pp. 1403- 1419 ,(2000) , 10.1002/1521-4095(200010)12:19<1403::AID-ADMA1403>3.0.CO;2-X
Rémy Guillet-Nicolas, Louis Marcoux, Freddy Kleitz, Insights into pore surface modification of mesoporous polymer–silica composites: introduction of reactive amines New Journal of Chemistry. ,vol. 34, pp. 355- 366 ,(2010) , 10.1039/B9NJ00478E
Anne Galarneau, Hélène Cambon, Francesco Di Renzo, Ryong Ryoo, Minkee Choi, François Fajula, Microporosity and connections between pores in SBA-15 mesostructured silicas as a function of the temperature of synthesis New Journal of Chemistry. ,vol. 27, pp. 73- 79 ,(2003) , 10.1039/B207378C
Bob Grünberg, Thomas Emmler, Egbert Gedat, Ilja Shenderovich, Gerhard H. Findenegg, Hans-Heinrich Limbach, Gerd Buntkowsky, Hydrogen bonding of water confined in mesoporous silica MCM-41 and SBA-15 studied by 1H solid-state NMR. Chemistry: A European Journal. ,vol. 10, pp. 5689- 5696 ,(2004) , 10.1002/CHEM.200400351
E. I. Basaldella, J. C. Tara, G. Aguilar Armenta, M. E. Patiño-Iglesias, E. Rodríguez Castellón, Propane/propylene separation by selective olefin adsorption on Cu/SBA-15 mesoporous silica Journal of Sol-Gel Science and Technology. ,vol. 37, pp. 141- 146 ,(2006) , 10.1007/S10971-006-6434-Y
Liangming Wei, Nantao Hu, Yafei Zhang, Synthesis of Polymer—Mesoporous Silica Nanocomposites Materials. ,vol. 3, pp. 4066- 4079 ,(2010) , 10.3390/MA3074066