دانلود رایگان مقاله لاتین سلولز متخلخل از سایت الزویر
عنوان فارسی مقاله:
سلولز متخلخل یکپارچه اساس سلسله مراتب: قالب آزاد ساختگی، مورفولوژی - قابل تنظیم و پلت فرم کارکردی راحتی
عنوان انگلیسی مقاله:
A hierarchically porous cellulose monolith: A template-free fabricated, morphology-tunable, and easily functionalizable platform
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Hierarchically porous monoliths with continuous macroporous structures and large surface areas based on mesopores (Chakraborty, Colón, Snurr, & Ngugen, 2015; Moitra et al., 2013; Saba, Mousavi, Bühlmann, & Hillmyer, 2015; Sai et al., 2013; Ungureanu et al., 2015) can meet the demands of growing applications such as protein immobilization, adsorption, ion-exchange, catalysis, and sensors (Bronstein et al., 2004; Li, Tolley, & Lee, 2010; Okada, Asakura, Tokudome, Nakahira, & Takahashi, 2015; Tokarev, & Minko, 2009). The fabrication of such monoliths as well as control of the porous morphology for size-selective separation have been reported. Among these studies, there have been many reports on inorganic materials such as carbon, silica, and titanium dioxide (Inayat, Reinhardt, Uhlig, Einicke, & Enke, 2013; Moitra et al., 2013; Ungureanu et al., 2015). Although synthetic polymeric monoliths have been recently developed because of their excellent biocompatibility, high chemical stability, and facile modifiability(Nischang, & Causon, 2016; Nischang, 2013), fabrication techniques aiming to obtain hierarchically porous structures remains limited. In most cases, free-radical polymerization, polymerization of high internal phase emulsions, and thin-layer membrane fabrication are used (Bolton, Bailey, & Rzayev, 2011; Hess et al., 2015; Seo, Kim, Oh, Kim, & Hillmyer, 2015; Sevsek, Brus, Je ˇ rabek, & Krajnc, 2014 ˇ ), which involve complicated and time-consuming processes. We have achieved facile fabrication of hierarchically porous monoliths from polymer solutions using thermally induced phase separation (TIPS). Monoliths of poly(acrylonitrile), poly(vinyl alcohol), poly(ethylene-co-vinyl alcohol), and poly(-glutamic acid) were successfully prepared by selecting an appropriate mixed solvent (Okada et al., 2011; Park et al., 2013; Sun, Fujimoto, & Uyama, 2013; Wang, & Uyama, 2015). These monoliths contained uniform mesopores as well as sub-micron or micron-sized macropores. The monoliths were obtained using simple processes, namely, solubilization of the polymer powder into a mixture of solvents by heating and subsequent cooling of the solution, during which phase separation took place to form the monolith. Cellulose, which is the most abundant organic compound on Earth, has a linear structure of a (1→4) linked d-glucose repeating unit. It is one of the three major structural components of the primary cell walls of green plants, along with hemi-cellulose and lignin. Based on its characteristic structure, cellulose possesses high crystallinity and mechanical strength. Additionally, cellulose is not soluble in water or common organic solvents due to the strong intermolecular hydrogen bonding of cellulose chains. In addition to the paper industry, cellulose is widely used in various fields such as the chemical, textile, and food industries. Furthermore, cellulose is one of the most important matrices for separation applications because of its high hydrophilicity, resistance to solvents, and mechanical strength (Credou, & Berthelot, 2014; Klemm, Heublein, Fink, & Bohn, 2005; Moon, Martini, Nairn, Simonsen, & Youngblood, 2011). In particular, its highly hydrophilic property prevents non-specific adsorption of biomolecules such as proteins on the cellulose matrix for biomedical applications.
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کلمات کلیدی:
Hierarchically Porous Carbon Monoliths Comprising Ordered ... pubs.acs.org/doi/abs/10.1021/acs.chemmater.6b01261 by G Hasegawa - 2016 - Cited by 14 - Related articles May 12, 2016 - This report demonstrates a facile one-pot synthesis of hierarchically porous resorcinol-formaldehyde (RF) gels comprising mesoporous ... Strong Hierarchically Porous Monoliths by Pulsed Current Processing ... pubs.acs.org/doi/abs/10.1021/am900760w by P Vasiliev - 2010 - Cited by 36 - Related articles Feb 10, 2010 - Binderless hierarchically porous monoliths have been produced from silicalite-1 and ZSM-5 zeolite powders by a rapid and facile powder ... Hierarchically Porous Polymer Monoliths by Combining Controlled ... pubs.acs.org/doi/abs/10.1021/jacs.5b04992 by SA Saba - 2015 - Cited by 30 - Related articles Jul 10, 2015 - Hierarchically Porous Cellulose Monolith Prepared by Combination of Ice-template Method and Non-solvent-induced Phase Separation ... Grafted Polymethylhydrosiloxane on Hierarchically Porous Silica ... pubs.acs.org/doi/abs/10.1021/acsami.6b12653 by CH Pélisson - 2016 - Cited by 2 - Related articles Dec 14, 2016 - Polymethylhydrosiloxane has been grafted on the surface of a hierarchically porous silica monolith using a facile catalytic reaction between ... Hierarchically Porous Silver Monoliths from Colloidal Bicontinuous ... pubs.acs.org/doi/abs/10.1021/ja201650z by MN Lee - 2011 - Cited by 38 - Related articles Mar 31, 2011 - Silver monoliths with interconnected hierarchical pore networks and three-dimensional (3D) bicontinuous morphology are synthesized from a ... Hierarchically Porous Cellulose Monolith Prepared by Combination of ... www.journal.csj.jp/doi/abs/10.1246/cl.170155 by X Sun - 2017 - Cited by 1 Hierarchically Porous Cellulose Monolith Prepared by Combination of an Ice-Template Method and a Non-Solvent Induced Phase Separation Method. [PDF]One-Pot Route towards Active TiO2 Doped Hierarchically Porous ... www.mdpi.com/1996-1944/10/4/373/pdf by X Sun - 2017 Mar 31, 2017 - Hierarchically Porous Cellulose: Highly Efficient. Photocatalysts for ... adopted to characterize the cellulose/TiO2 composite monolith.
