Parametric study of factors affecting melamine-resorcinol-formaldehyde xerogels properties

Carbonisation of Resorcinol-Formaldehyde Organic Xerogels: Effect of Temperature, Particle Size and Heating Rate on the Porosity of Carbon Xerogels

Resorcinol-Formaldehyde organic xerogels with an initial pH of 6.5 were synthesized in a microwave oven and then carbonised in a furnace. The influence of the carbonisation temperature, heating rate and the particle size of the organic xerogels upon the pore structure of the carbon xerogels was assessed. The textural properties of the organic and carbon xerogels were evaluated from N2 adsorptio...

Waterborne Colloidal Polymer/Silica Hybrid Dispersions and Their Assembly into Mesoporous Poly(melamine-formaldehyde) Xerogels.

The acid-catalyzed polycondensation of oligo(melamine-formaldehyde) in aqueous phase and in the presence of silica nanoparticles leads to a stable dispersion of coexisting silica and polymer nanoparticles. The dispersion can be processed into mesoporous xerogels (SBET ≈ 200 m(2) g(-1)), whose porosity can be enhanced by etching of silica up to specific surface areas of >400 m(2) g(-1). The form...

Melamine-Bridged Alkyl Resorcinol Modified Urea– Formaldehyde Resin for Bonding Hardwood Plywood

A powdery product was obtained by the reaction of methylolated melamine with alkyl resorcinols to form melamine-bridged alkyl resorcinols (MARs). The effects of the addition of this powder on the bonding strength and formaldehyde emission of urea–formaldehyde (UF) resins were investigated. Three types of UF resins with a formaldehyde/urea molar ratio of 1.3 synthesized by condensation at pH 1.0...

Resorcinol-Formaldehyde (R-F) Resin

Parametric Study of Factors affecting the Composition of Producer Gas

Biomass is recognized to be the major potential source for energy production. Gasification enables conversion of these materials into combustible gas, mechanical and electrical power, synthetic fuels, and chemicals. In the present study, a model developed by us in our earlier study is used for predicting the steady-state composition and rate of reaction profiles for the reduction zone of the do...