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Method for preparing automatic humidity control material from calcium chloride

A humidity control material, calcium chloride technology, applied in the direction of aluminum silicate, silicate, etc., can solve the problems of lack of strength, affect the effect of automatic humidity control, and cannot directly use the building wall alone, etc., to achieve moisture release Strong ability, conducive to humidity control performance, superior effect of automatic humidity adjustment

Active Publication Date: 2019-07-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned patent No. CN108262003A is to use diatomite to prepare diatom-based calcium silicate hydrate powder humidity-conditioning material, but because it does not have strength, it cannot be used directly on the wall of a building alone, and only part of it can be added to affect the humidity. automatic humidity control effect

Method used

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  • Method for preparing automatic humidity control material from calcium chloride
  • Method for preparing automatic humidity control material from calcium chloride
  • Method for preparing automatic humidity control material from calcium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The mixture of waste glass and limestone selected through a 100-mesh sieve and dried is expressed in cg (the mass percentage of waste glass and limestone is 50%:50%).

[0024] In this embodiment 1, the calcium chloride content is used as a variable, and the influence of different calcium chloride content on the humidity control performance of the cured product is explored and analyzed. First, add an appropriate amount of calcium chloride (1% to 15%) in the cg, and then additionally measure 5% to 10% of the total weight of water or sodium hydroxide solution (concentration is 2 to 5mol / L), and mix it according to the above ratio After the raw materials are mixed evenly, they are pressed and formed under the FW-4 desktop powder tablet press (the forming pressure is 30MPa), and the demolded samples are put into a hydrothermal kettle for hydrothermal curing (temperature 200°C, time 15h). The cured sample (40mm×15mm×6mm) was dried in an oven at 80°C for 24 hours to obtain a c...

Embodiment 2

[0033] Taking the content of calcium chloride as a variable, observe the influence of its change on the humidity control performance, and discuss the effect of calcium chloride on the automatic humidity control material.

[0034] According to the analysis of the types of isotherm adsorption curves classified by the International Union of Chemistry (IUPAC) by Nobuji Watari, it is found that materials with IV-type isotherm adsorption curves are more suitable as humidity control materials; and using Kelvin and related formulas, it can be deduced that the pore size is between 3.2 and Materials between 7.4nm can automatically maintain the indoor relative humidity at 40% to 70%, which is the most comfortable range for the human body.

[0035] Using Example 1, a cured product (sample) was obtained. Experimental results such as Figure 3-5 shown, from image 3 It can be found that the above theory is indeed well met. As the calcium chloride content continues to increase, the mesopor...

Embodiment 3

[0040] In this example, the content of calcium chloride is selected as 10%, and the mass ratio of waste glass to limestone is used as a variable to explore and analyze the influence of different calcium chloride contents on the humidity control performance of the cured sample.

[0041] Firstly, a mixture cg of different mass ratios of waste glass to limestone (2:8-6:4) is prepared, and the mass percentage is converted into waste glass:limestone=20%-60%:40%-80%. Then mix with calcium chloride: cg=1:9, and then additionally take 5% to 10% of the total weight of water or sodium hydroxide solution (concentration is 2 to 5mol / L), and mix the raw materials according to the above ratio After homogeneity, it is pressed and formed under the FW-4 desktop powder tablet press (forming pressure is 30MPa), and the sample after demoulding is put into a hydrothermal kettle for hydrothermal curing (temperature 200°C, time 15h). After the cured sample (40mm×15mm×6mm) was dried in an oven at 80°...

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Abstract

The invention relates to a method for preparing an automatic humidity control material from calcium chloride, and belongs to the technical field of preparation of indoor functional decorative materials of buildings. The method comprises the steps as follows: waste glass and limestone are crushed, sieved by a 100-mesh sieve and dried; 20%-90% by mass of waste glass and 10%-80% by mass of limestoneare weighed, 85%-99% by mass of limestone and 1%-15% by mass of calcium chloride are weighed, and finally, water or a sodium hydroxide solution accounting for 5%-10% of the total weight of waste glass, limestone and calcium chloride is weighed, wherein the concentration of the sodium hydroxide solution is 2-5 mol / L; after all the raw materials are uniformly mixed, the mixture is pressed into a block sample under molding pressure of 10-30 MPa and demoulded, hydrothermal curing is performed for 1-24 h at temperature of 140-200 DEG C, and the block cured product prepared after drying is a high-strength automatic humidity control building material. The method adopts a simple process and is energy-saving and environmentally friendly, and the obtained product has superior moisture absorption anddesorption performance, which far exceeds the national standard requirements of JC / T 2082-2011 indoor decorative building materials with the function of humidity-control.

Description

technical field [0001] The invention relates to a method for preparing an automatic humidity-regulating material by using calcium chloride, and belongs to the technical field of preparation of indoor functional facing materials for buildings. Background technique [0002] With the development of the times and the improvement of living standards, people have higher and higher requirements for environmental comfort. Moreover, an average of nearly 90% of the time in a person's life is spent indoors. Therefore, the comfort and health of the living environment have been paid more and more attention. Among them, in addition to temperature, indoor humidity has an important impact on people's health and comfort. The humidity is largely affected by the relative humidity of the air. When the relative humidity is too high, the body feels stuffy, and the bacteria and viruses in the air multiply quickly; when the relative humidity of the air is too low, the human body will feel dry and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00C01B33/26
CPCC01B33/26C01P2002/72C01P2004/03C04B30/00
Inventor 景镇子裘鹏程祁郁捷
Owner TONGJI UNIV
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