Editorial on Special Issues “Aerogels” and “Aerogels 2018”
نویسندگان
چکیده
منابع مشابه
High porosity polyethylene aerogels
Monolithic aerogels of high molecular weight polyethylene (Mw= 3x106- 6x106 g/mol) have been prepared by solvent extraction with supercritical carbon dioxide from thermoreversible gels prepared in decalin. These low density and highly porous aerogels present an apparent porosity up to 90%. The aerogel morphology observed by scanning electron microscopy (SEM) is characterized by spherulitic stru...
متن کاملChitin Nanowhisker Aerogels
Chitin nanowhiskers are structured into mesoporous aerogels by using the same benign process used previously in our group to make cellulose nanowhisker aerogels. The nanowhiskers are sonicated in water to form a hydrogel before solvent-exchange with ethanol and drying under supercritical CO2 (scCO2 ). Aerogels are prepared with various densities and porosities, relating directly to the initial ...
متن کامل2 SiO 2 Aerogels
This chapter focuses on one of the most studied aerogel materials, silica aerogels. It aims at presenting a brief overview of the elaboration steps (sol–gel synthesis, aging, and drying), the textural and chemical characteristics (aggregation features, porosity, and surface chemistry), the main physical properties (from thermal, mechanical, acoustical, and optical, to biological, medical, etc.)...
متن کاملGas flow through aerogels
Aerogels have an extraordinarily large internal surface area which is accessible via open pores, making them candidates for filters and gas adsorption media. The idea is frequently included in lists of potential applications, but little research has been conducted on the use of aerogels as filters or adsorption media. Consideration of aerogels for use as aerosol collection media requires knowle...
متن کاملSynthesis and textural characteristics of organic aerogels, transition-metal-containing organic aerogels and their carbonized derivatives
Four organic aerogels were prepared by the sol-gel method from polymerization of resorcinol with formaldehyde catalyzed by Na CO . These aerogels were further pyrolyzed in N in order to obtain their corresponding carbon aerogels, 2 3 2 and after that activated with either steam or CO to obtain activated carbon aerogels. Another series of organic aerogels and 2 their pyrolyzed and activated deri...
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ژورنال
عنوان ژورنال: Gels
سال: 2020
ISSN: 2310-2861
DOI: 10.3390/gels6030019