Preparation and Performance of Inorganic Heat Insulation Panel Based on Sepiolite Nanofibers

Abstract

High efficiency and low cost thermal insulation energy saving panel materials containing sepiolite nanofibers were developed by means of the synergistic action of inorganic adhesive, curing agent, and hydrogen peroxide. The water soluble sodium silicate was used as inorganic adhesive, and the sodium fluorosilicate was chosen as curing agent. Moreover, appropriate amount of hydrogen peroxide was added in order to decrease the bulk density and improve the heat insulation performance of panel materials. The results showed that the synergistic action of inorganic adhesive, curing agent, and hydrogen peroxide could make thermal insulation energy saving panel materials have low bulk density and high mechanical performance, and the optimal process was as follows: 120 ∘ C of drying temperature, 1.6% of sodium silicate as inorganic adhesive, 12% of sodium fluorosilicate as curing agent in sodium silicate, and 2.5% of hydrogen peroxide. The thermal insulation energy saving panel materials as prepared could arrest heat transmission and resist external force effectively.

High emission reduction performance of a novel organic-inorganic composite filters containing sepiolite mineral nanofibers

“…Sepiolite is a type of fibrous silicate clay mineral rich of magnesium with a unit cell formula of Si 12 O 30 Mg 8 (OH) 4 (H 2 O) 4 ·8H 2 O and fine microporous channels of dimensions of 0.37 nm × 1.06 nm running parallel to the direction of fibers 18 19 20 21 . Benefitting from its large reservation, low cost, high efficiency and reusable attribute, sepiolite has been intensively studied in recent years 22 23 24 25 26 27 28 . Although the defibering treatment of sepiolite is a simple and cheap way to obtain mineral nanofibers for practical use, it has been less investigated except for a few exploratory researches which mostly involve destruction of its fibrous micro-morphology by ball milling and the use of expensive and sensitive agents 29 30 .…”