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Pore Structure Tuning of Poly-EGDMA Biomedical Material by Varying the O-Quinone Photoinitiator.
Polymers (Basel)
June 2023
G. A. Razuvaev Institute of Organometallic Chemistry of the Russian Academy of Sciences, 49 Tropinina, 603950 Nizhny Novgorod, Russia.
Porous polymer monoliths with thicknesses of 2 and 4 mm were obtained via polymerization of ethylene glycol dimethacrylate (EGDMA) under the influence visible-light irradiation in the presence of a 70 wt% 1-butanol porogenic agent and o-quinone photoinitiators. The o-quinones used were: 3,5-di-tret-butyl-benzoquinone-1,2 (35Q), 3,6-di-tret-butyl-benzoquinone-1,2 (36Q), camphorquinone (CQ), and 9,10-phenanthrenequinone (PQ). Porous monoliths were also synthesized from the same mixture but using 2,2'-azo-bis(iso-butyronitrile) (AIBN) at 100 °C instead o-quinones.
View Article and Find Full Text PDFAssessment of scaffold porosity: the new route of micro-CT.
J Appl Biomater Biomech
May 2012
Bioengineering Department, Politecnico di Milano, Milan - Italy.
A complete morphologic characterization of porous scaffolds for tissue engineering application is fundamental, as the architectural parameters, in particular porosity, strongly affect the mechanical and biological performance of the structures. Therefore, appropriate techniques for this purpose need to be selected. Several techniques for the assessment of scaffold porosity have been proposed, including Scanning Electron Microscopy observation, mercury and liquid extrusion porosimetry, gas pycnometry, and capillary flow porometry.
View Article and Find Full Text PDFCharacterizing organic monolithic columns using capillary flow porometry and scanning electron microscopy.
Anal Chem
January 2012
Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA.
Polyethylene glycol diacrylate monoliths prepared using different amounts of monomer, porogen ratio, and capillary dimensions were characterized using capillary flow porometry (CFP) and scanning electron microscopy (SEM). Our results reveal good agreement between SEM and CFP measurements for through-pore size distribution. The CFP measurements for monoliths prepared by the same procedure in capillaries with different diameters (i.
View Article and Find Full Text PDF[The determination of the porosity of a basic acrylic plastic by mercury porometry].
Stomatologiia (Mosk)
November 1991
A method for estimation of pore sizes in acrylic plastic dentures is described. Size-distribution of pores may be a very informative characteristic of not only strength, esthetic, and hygienic characteristics of dentures, but an indicator of a plastic polymerization process in various humidity and temperature conditions.
View Article and Find Full Text PDF[Structure of the interstitial space and ground substance of the human articular cartilage].
Arkh Anat Gistol Embriol
June 1990
By means of transmissive and scanning electron microscopy (investigation of ultra-replicas) three-dimensional organization of the interstitial (interfibrillar) space of the articular cartilage has been demonstrated; it repeats, to some extent, construction of the fibrous base. By means of mercury porometry quantitative characteristics of various parameters of the interfibrillar space are obtained. Their specific volume is 0.
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