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A kind of high-strength antibacterial core material for color steel sandwich panel and preparation method thereof

A sandwich panel, high-strength technology, applied in the field of thermal insulation materials, can solve the problem that the added amount cannot achieve the expected antibacterial effect, weaken the physical properties of the core material, etc., and achieve excellent foam stabilization effect, increase strength, and improve the effect of antibacterial performance.

Active Publication Date: 2022-04-26
ANHUI EMINENT BUILDING MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, since the addition of a large amount of antibacterial agents tends to weaken the physical properties of the core material, and the addition of too low an antibacterial effect cannot achieve the expected antibacterial effect, therefore, how to balance the physical properties and antibacterial properties of the core material has become a focus of attention.

Method used

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  • A kind of high-strength antibacterial core material for color steel sandwich panel and preparation method thereof

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Embodiment 1

[0020] A method for preparing a high-strength antibacterial core material for color steel sandwich panels, comprising the following steps:

[0021] S1. Add wheatgrass alkali lignin into NaOH aqueous solution with a pH of 9.5, stir at 60° C. until it is fully dissolved, and obtain an alkali lignin solution with a mass fraction of 20%. The filter membrane is subjected to ultrafiltration, and the retentate A and the permeate B are collected;

[0022] S2. Add nano-silver into the retentate A to disperse uniformly by ultrasonic, then shake and adsorb at 40°C for 24h, then add organosilicon quaternary ammonium salt DC5700, shake and react at 70°C for 12h, after the reaction is completed, adjust the pH of the obtained reaction solution To 2, freeze-dry the obtained precipitate to obtain alkali lignin-based additive A, wherein the ratio of nano-silver, organosilicon quaternary ammonium salt and retentate A is 0.3g: 30mL: 100mL;

[0023] S3. Mix polyethylene glycol, epichlorohydrin, t...

Embodiment 2

[0027] A method for preparing a high-strength antibacterial core material for color steel sandwich panels, comprising the following steps:

[0028] S1. Add wheatgrass alkali lignin into NaOH aqueous solution with a pH of 10, stir at 75° C. until it is fully dissolved, and obtain an alkali lignin solution with a mass fraction of 25%. The filter membrane is subjected to ultrafiltration, and the retentate A and the permeate B are collected;

[0029] S2. Add nano-silver into the retentate A to disperse uniformly by ultrasonic, then shake and adsorb at 50°C for 18h, then add organosilicon quaternary ammonium salt DC5700, shake and react at 75°C for 10h, after the reaction is completed, adjust the pH of the obtained reaction solution To 2.5, freeze-dry the obtained precipitate to obtain alkali lignin-based additive A, wherein the ratio of nano-silver, organosilicon quaternary ammonium salt and retentate A is 0.35g: 35mL: 100mL;

[0030] S3. Mix polyethylene glycol, epichlorohydrin,...

Embodiment 3

[0034] A method for preparing a high-strength antibacterial core material for color steel sandwich panels, comprising the following steps:

[0035] S1. Add wheatgrass alkali lignin into NaOH aqueous solution with a pH of 10, stir at 80° C. until it is fully dissolved, and obtain an alkali lignin solution with a mass fraction of 30%. The filter membrane is subjected to ultrafiltration, and the retentate A and the permeate B are collected;

[0036] S2. Add nano-silver into the retentate A to disperse uniformly by ultrasonic, then shake and adsorb at 60°C for 12h, then add organosilicon quaternary ammonium salt DC5700, shake and react at 80°C for 6h, after the reaction is completed, adjust the pH of the obtained reaction solution To 3, freeze-dry the obtained precipitate to obtain alkali lignin-based additive A, wherein the ratio of nano-silver, organosilicon quaternary ammonium salt and retentate A is 0.5g: 40mL: 100mL;

[0037] S3. Mix polyethylene glycol, epichlorohydrin, tetra...

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Abstract

The invention discloses a high-strength antibacterial core material for color steel sandwich panels and a preparation method thereof, wherein the preparation method comprises: fractionating and separating alkali lignin solution according to molecular weight by ultrafiltration, collecting and obtaining retentate A and permeating Solution B; modify the high molecular weight alkali lignin component in the retentate solution A with nano-silver and organosilicon quaternary ammonium salt to obtain alkali lignin-based additive A; use epichlorohydrin as a crosslinking agent, and polyethylene Diol is grafted onto the low-molecular-weight alkali lignin component in the permeate liquid B to obtain alkali lignin-based additive B; alkali lignin-based additive A and alkali lignin-based additive B are added in a certain proportion to polyurethane foaming and heat preservation The raw material of the material is foamed, matured and solidified to obtain. The core material for the color steel sandwich panel prepared by the invention has high strength and high antibacterial performance, and can meet the use requirements of special industries such as medical treatment and pharmacy.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a high-strength antibacterial core material for color steel sandwich panels and a preparation method thereof. Background technique [0002] Color steel sandwich panel is a commonly used building material. It consists of upper and lower layers of panels made of metal or non-metallic materials and an inner core in the middle of the panels. It has the advantages of light weight, easy installation, and good thermal insulation effect. Its The performance of heat preservation, heat insulation and sound absorption mainly depends on its core material. The core materials of color steel sandwich panels mainly include phenolic, polystyrene, rigid polyurethane, polyester and rock wool materials, etc. Among them, rigid polyurethane is one of the core materials with the best thermal insulation effect and is widely used. In recent years, with the popularization and applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/40C08G18/42C08G18/48C08G18/64C08J9/14C08G101/00
Inventor 万贤虎万子涵
Owner ANHUI EMINENT BUILDING MATERIALS TECH
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