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A kind of phosphomolybdic acid intercalation hydrotalcite-like lightweight foam heat insulation material and preparation method thereof

A technology of lightweight foam and thermal insulation material, applied in the field of biomass foam materials, can solve the problems of poor fire resistance, high thermal conductivity, unenvironmental protection, etc., and achieve the effects of low thermal conductivity, high flame retardant effect, and high porosity

Active Publication Date: 2022-05-20
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Inorganic lightweight foam insulation materials generally have the advantages of good thermal insulation performance, non-combustibility and environmental protection, but there are defects such as high thermal conductivity and high density of the material; on the contrary, organic lightweight foam insulation materials are generally It has the advantages of small thermal conductivity, light weight, and good heat insulation and moisture retention properties, but the material has poor fire resistance, is flammable, and is not environmentally friendly

Method used

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  • A kind of phosphomolybdic acid intercalation hydrotalcite-like lightweight foam heat insulation material and preparation method thereof
  • A kind of phosphomolybdic acid intercalation hydrotalcite-like lightweight foam heat insulation material and preparation method thereof
  • A kind of phosphomolybdic acid intercalation hydrotalcite-like lightweight foam heat insulation material and preparation method thereof

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preparation example Construction

[0038] M of a specific embodiment of the present invention 2+ 1-x m 3+ x -PMo 12 o 40 -LDHs / cellulose lightweight foam thermal insulation material and preparation method thereof, comprising the following steps:

[0039] (1) Prepare M by co-precipitation method 2+ 1-x m 3+ x - LDHs precursors.

[0040] (2) The LDHs precursor in (1) was modified by ion exchange method to obtain M 2+ 1-x m 3+ x -PMo 12 o 40 -LDHs. The guest can be phosphomolybdic acid or various phosphomolybdates.

[0041] (3) The M obtained in (2) 2+ 1-x m 3+ x -PMo 12 o 40 - LDHs, cellulose, linking agent, etc. are stirred evenly according to a certain mass ratio, and the lightweight foam refractory material is prepared by freeze-drying method.

[0042] As preferably, in the step (1), the co-precipitation method is: weighing the hydrated M 2+ Salt, M 3+ The salt is formulated into a mixed salt solution in proportion, and in N 2 Under the atmosphere, stir vigorously with the alkali solu...

Embodiment

[0062] 1. Press n(Zn 2+ ) / n(Al 3+ )=3:1 Weigh Zn(NO 3 ) 2 .9H 2 O and Al(NO 3 ) 3 .9H 2 O, adjust the pH value to 7.0, react at 70°C for 12h, and prepare ZnAl-NO by co-precipitation method 3 -LDHs.

[0063] 2. press m 主体 / m [PMo12O40] 3- =1:2 Accurately weigh a certain mass H 3 PMo 12 o 40 Dissolved in deionized water, neutralized with quantitative NaOH to obtain sodium phosphomolybdate solution. in N 2 Under the atmosphere, the sodium phosphomolybdate solution was added dropwise to the ZnAl-NO 3 - Stir vigorously in the LDHs main body slurry; make the reaction solution react at a set temperature of 60° C. for 14 hours. After repeated washing with deionized water, dry under normal pressure at 50°C for 24 hours to obtain ZnAl-PMo 12 o 40 -LDHs white solid.

[0064] 3. According to the dry weight mass percentage ratio (CNF+PMo-LDHs+H 3 BO 3 Total 100%), the ZnAl-PMo 12 o 40 - LDHs slurry and CNF are mixed and stirred evenly; and a certain amount of boric a...

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Abstract

The invention discloses a phosphomolybdic acid intercalated hydrotalcite-like lightweight foam heat insulation material and a preparation method thereof. The preparation method comprises: preparing M 2+ 1‑x m 3+ x ‑LDHs precursor; use ion exchange method, drop phosphomolybdic acid or phosphomolybdate solution into the precursor slurry, modify it to obtain M 2+ 1‑x m 3+ x -PMo 12 o 40 ‑LDHs; the M 2+ 1‑x m 3+ x -PMo 12 o 40 ‑LDHs mixed with cellulose and linking agent, and freeze-dried to obtain phosphomolybdic acid intercalated hydrotalcite-like lightweight foam insulation material. The LDHs modified by heteropolyphosphomolybdic acid intercalation solves the problems of large addition amount, poor dispersion and low flame retardant efficiency when single LDHs are used as flame retardants. , high strength, and renewable characteristics, endowing foam materials with low density, high strength, and environmental protection.

Description

technical field [0001] The invention belongs to the field of biomass foam materials, in particular to a hydrotalcite-like lightweight foam heat insulation material and a preparation method thereof. Background technique [0002] Energy conservation is an important social awareness in today's world, which refers to reducing energy consumption as much as possible and increasing energy utilization. Lightweight heat insulation and fireproof insulation materials play an important role in reducing energy loss and improving energy utilization. Lightweight foam materials, also known as lightweight foam heat insulation materials, refer to a series of foam materials with excellent characteristics such as small bulk density, low thermal conductivity, good heat insulation and fire resistance, good sound insulation effect, shock resistance cushioning performance and high specific strength. Due to its excellent characteristics, it has been widely developed and applied in the fields of avi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08K9/02C08K7/00C08K3/22C08K3/38C08L1/02
CPCC08J9/28C08J2301/02C08K9/02C08K7/00C08K3/22C08K3/38Y02B30/90
Inventor 黄自知袁利萍吴袁泊汤连东王琼王文磊胡云楚文瑞芝袁光明吴义强胡进波陈强
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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