Gypsum-based composite humidity control material and preparation method thereof

A humidity-conditioning material and gypsum-based technology, applied in the field of gypsum-based composite humidity-conditioning materials and their preparation, can solve problems such as salting out and contamination of other items, and achieve strong humidity-conditioning capacity, high humidity capacity, high bending resistance and resistance to The effect of compressive strength

Inactive Publication Date: 2012-12-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these developed gypsum-based humidity-conditioning materials have high humidity capacity and humidity-conditioning performance, they all contain LiCl or CaCl 2 Chloride, there is a potential danger of salting out and contaminating other items during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025](1) Roast the sepiolite raw material at 300°C for 90 minutes; then put it into a 1.2mol / L HCl aqueous solution at a solid-to-liquid mass ratio of 1:10, and soak at 95°C for 6 hours. Next, the above-mentioned sepiolite was added to 10wt% CTAB aqueous solution, and stirred at 70° C. for 3 hours; cooled, filtered, vacuum-dried at 100° C. for 60 minutes, and ground to obtain organically modified sepiolite.

[0026] (2) preparation mass fraction is the NaOH solution of 25%, under ice-water bath condition, NaOH solution is slowly dripped in the acrylic acid, obtains the acrylic acid-sodium acrylate solution that the degree of neutralization is 60%; Then press the sum of acrylic acid and sodium acrylate and The mass ratio of acrylamide is 1:2. Acrylamide is added to the above solution to prepare a monomer solution. Then add the organically modified sepiolite into the monomer solution according to 1% of the mass of the monomer for stirring and mixing, and oscillate ultrasonicall...

Embodiment 2

[0030] (1) Roast the sepiolite raw material at 300°C for 90 minutes; then put it into a 1.2mol / L HCl aqueous solution at a solid-to-liquid mass ratio of 1:10, and soak at 95°C for 6 hours. Next, the above-mentioned sepiolite was added to 10wt% CTAB aqueous solution, and stirred at 70° C. for 3 hours; cooled, filtered, vacuum-dried at 100° C. for 60 minutes, and ground to obtain organically modified sepiolite.

[0031] (2) preparation mass fraction is the NaOH aqueous solution of 25%, slowly drips NaOH solution in the acrylic acid under the ice-water bath condition, obtains the acrylic acid-sodium acrylate solution that the degree of neutralization is 75%; Then press the sum of acrylic acid and sodium acrylate and The mass ratio of acrylamide is 1:1. Acrylamide is added to the above solution to prepare a monomer solution. Then add the organically modified sepiolite into the monomer solution according to 6% of the mass of the monomer solution for stirring and mixing, and then ul...

Embodiment 3

[0035] (1) Roast the sepiolite raw material at 300°C for 90 minutes; then put it into a 1.2mol / L HCl aqueous solution at a solid-to-liquid mass ratio of 1:10, and soak at 95°C for 6 hours. Next, the above-mentioned sepiolite was added to 10wt% CTAB aqueous solution, and stirred at 70° C. for 3 hours; cooled, filtered, vacuum-dried at 100° C. for 60 minutes, and ground to obtain organically modified sepiolite.

[0036] (2) preparation mass fraction is the NaOH aqueous solution of 25%, under ice-water bath condition, NaOH solution is slowly dripped in the acrylic acid, obtains the acrylic acid-sodium acrylate solution that the degree of neutralization is 80%; Then press the sum of acrylic acid and sodium acrylate and The mass ratio of acrylamide is 2:1. Acrylamide is added to the above solution to prepare a monomer solution. Then add the organically modified sepiolite into the monomer solution by 2% of the mass of the monomer for stirring and mixing, and then oscillate ultrasoni...

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Abstract

The invention discloses a gypsum-based composite humidity control material which does not contain chlorides and a preparation method thereof. The preparation method comprises the following steps of: firstly, preparing a sepiolite / poly (acrylic acid-acrylamide) composite humidity control ingredient with high humidity containing volume and humidity control capability with a reversed phase suspension method; then, adding the composite humidity control ingredient into building gypsum, lime powder and water; fully stirring and mixing, and extruding the mixture into a sample of the specific shape;and drying to obtain a finished product. The gypsum-based composite humidity control material prepared with the method has the advantages of high humidity containing volume, strong humidity control capability and higher rupture strength and compressive strength, the production requirements of humidity control building materials, such as gypsum building blocks, gypsum plates and the like can be satisfied so as to automatically regulate the humidity of the indoor space of a building after the gypsum-based composite humidity control material is used.

Description

technical field [0001] The invention relates to a composite humidity-regulating material and a preparation method thereof, in particular to a gypsum-based composite humidity-regulating material and a preparation method thereof. Background technique [0002] Like temperature, air humidity is also one of the important environmental parameters that affect the comfort of the indoor environment. A suitable humidity environment (40% to 60% RH) plays a very important role in human health, crop growth, preservation of items (food, medicine and cultural relics, etc.) and operation of precision instruments. At present, the most common method of humidity control is to use air-conditioning technology; however, air-conditioning technology has the disadvantages of high energy consumption, environmental pollution, and ecological damage, and will cause "air-conditioning syndrome" and "indoor air quality" problems, which are not in line with sustainable development strategic needs. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
Inventor 王吉会任曙凭张梦龙
Owner TIANJIN UNIV
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