Corncob-modified expanded perlite and phenolic resin composite insulation board and preparation method thereof

Abstract

The invention discloses a corncob-modified expanded perlite and phenolic resin composite insulation board, which is prepared from the following raw materials (by weight): 1.5-1.9 parts of silicon nanowires, 1.2-1.5 parts of polyaniline nanofiber, 3-4 parts of corncob, a proper amount of 5wt% sodium hydroxide solution, 55-57 parts of expanded perlite, 40-42 parts of phenolic resin, 4-4.1 parts of a curing agent HMTA, 2-2.3 parts of steel fiber, 10-11 parts of tetraethyl orthosilicate, a proper amount of 85wt% ammonia water, a proper amount of anhydrous ethanol, 160-180 parts of deionized water, a proper amount of n-hexane, 4-4.5 parts of nano-polytetrafluoroethylene, 0.1-0.2 part of dicumyl peroxide and 3-3.5 parts of 2,2,2-trifluoroethyl acrylate. By using polyaniline nanofiber for modification of corncob and then by puffing, corncob fiber has good toughness and good heat insulating property. Thus, toughness and heat insulating property of the insulation board are enhanced. By using silicon nanowires, wear resistance of the insulation board is boosted.

Description

technical field [0001] The invention relates to the technical field of thermal insulation wallboards, in particular to a corncob modified expanded perlite phenolic resin composite thermal insulation board and a preparation method thereof. Background technique [0002] Composite insulation materials (CompositeInsulationMaterials) are new materials that are uniformly composited by two or more insulation materials, usually referring to the composite of organic insulation materials and inorganic insulation materials, which have better performance than the original organic or inorganic materials. This paper makes full use of the advantages of abundant perlite mineral resources in Xinyang, uses expanded perlite (Expended Perlite, EP) and phenolic resin (Phenol-formaldchyde Resin, PF) as the main raw materials, and adds an appropriate amount of curing agent, toughening agent and hydrophobic agent. agent, hot-pressed under certain conditions, prepared into expanded perlite / phenolic ...

AI Technical Summary

Problems solved by technology

[0003] However, expanded perlite has a high water absorption rate and poor water resistance, which leads to large volume shrinkage and deformation of the thermal insulation mortar during mixing, and the thermal insulation performance of the product is reduced in the later stage, and the bonding strength with the matrix is ​​low, which affects the thermal insulation performance of the wallboard in the later stage.