Journal ArticleDOI
Surface diffusion of direct dyes in porous cellulose membranes
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In this article, a dyeing process was analyzed on the basis of the parallel transport mechanisms of surface and pore diffusion using Langmuir and Freundlich isotherms.About:
This article is published in Chemical Engineering Journal.The article was published on 1989-06-01. It has received 28 citations till now. The article focuses on the topics: Freundlich equation & Langmuir.read more
Citations
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Alpha-chitin nanocrystals prepared from shrimp shells and their specific surface area measurement.
TL;DR: To characterize alpha-chitin nanocrystals produced from shrimp shells in regard to crystallite properties and the specific surface area of the chitin nanoparticles, X-ray diffraction data indicate an increase in chit in crystallinity after hydrolysis, as less-ordered chitIn domains are digested.
Journal ArticleDOI
Effect of residual lignin and heteropolysaccharides in nanofibrillar cellulose and nanopaper from wood fibers
Ana Ferrer,Elisabet Quintana,Ilari Filpponen,Iina Solala,Teresa Vidal,Alejandro Rodríguez,Janne Laine,Orlando J. Rojas,Orlando J. Rojas +8 more
TL;DR: In this paper, the tensile index, elongation and elastic modulus of nanofibrillated cellulose (NFC) and nanopaper were compared and the effect of residual cell wall components accessed.
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Modification of nanocellulose with a xyloglucan-RGD conjugate enhances adhesion and proliferation of endothelial cells: implications for tissue engineering.
TL;DR: Initial cell studies showed that adhesion of human endothelial cells is enhanced when the BC hydrogel is modified with XG-GRGDS, and QCM-D studies revealed that the cell enhancement is due to the presence of the RGD epitope on XG and not to a nonspecific adsorption of fibronectin from cell culture medium.
Journal ArticleDOI
Valorization of residual Empty Palm Fruit Bunch Fibers (EPFBF) by microfluidization: production of nanofibrillated cellulose and EPFBF nanopaper.
Ana Ferrer,Ilari Filpponen,Alejandro Rodríguez,Janne Laine,Orlando J. Rojas,Orlando J. Rojas +5 more
TL;DR: Different cellulose pulps produced from sulfur-free chemical treatments of Empty Palm Fruit Bunch Fibers, a by-product from palm oil processing, generated distinct chemical and morphological characteristics and ensuing nanopaper properties that opens the possibility for valorization of such widely available bioresource.
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Pretreatment of Corn Stover with Twin-Screw Extrusion Followed by Enzymatic Saccharification
TL;DR: The Langmuir adsorption model was shown to be an effective tool for the estimation of the SSA of corn stover and revealed that extrusion can open the cell wall at the microscopic scale, which was especially favorable on sugar yields.
References
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Journal ArticleDOI
Chromatographic study of surface diffusion
Petr Schneider,J. M. Smith +1 more
TL;DR: In this article, a new method based upon chromatography was used to measure surface diffusion coefficients for ethane, propane, and n-butane on silica gel, which correspond to very low surface coverages (fraction of a monolayer of the order of 10−4).
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Effective surface diffusion coefficients of volatile organics on activated carbon during adsorption from aqueous solution
Motoyuki Suzuki,Kunitaro Kawazoe +1 more
TL;DR: In this paper, the authors used the concentration-time diagrams appropriated for Freundlich isotherms to determine the effective surface diffusion coefficients for fifteen kinds of volatile organics on activated carbon from aqueous solution.
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Dye diffusion in water-swollen cellulose membranes and in bulk water
T. Hori,M. Mizuno,T. Shimizu +2 more
TL;DR: In this paper, the pore model for diffusion is modified by taking account the steric hindrance of diffusing molecules, and the validity of the modified model is examined for the steady state diffusion measurement of eight dyes through four kinds of regenelated cellulose membranes, at 50 °C.
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Sorption-diffusion in heterogeneous systems. Part 3.—Experimental models of dye sorption
P. B. Weisz,H. Zollinger +1 more
TL;DR: In this paper, the authors made experimental studies of the sorption dynamics of dye molecules on rigid potous substrates (silica-alumina spheres) of known pore structure, and the apparent diffusivity of the dye molecules was shown to vary by several orders of magnitude for different substrate/dye sorption affinities.
Journal ArticleDOI
Transport of direct dye into cellulose membrane
TL;DR: In this article, the authors analyzed the dyeing process for a cellulose membrane-direct dye system based on a parallel transport mechanism of surface and pore diffusion with Freundlich isotherm.