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Method for preparing humidity-adjusting material from loess or sepiolite

A humidity-conditioning material and a technology of sepiolite, which is applied in the field of preparing humidity-conditioning materials by using loess or sepiolite, can solve the problems of affecting humidity-conditioning performance and destroying porous structures, and achieve the effects of reducing usage and saving energy.

Inactive Publication Date: 2012-07-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firing preparation will destroy the porous structure of the raw material, thereby affecting its humidity control performance

Method used

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  • Method for preparing humidity-adjusting material from loess or sepiolite
  • Method for preparing humidity-adjusting material from loess or sepiolite
  • Method for preparing humidity-adjusting material from loess or sepiolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, select loess as the main raw material, select industrial slaked lime as the auxiliary raw material, mix the above raw materials so that in the mixture, slaked lime accounts for 18% by weight; then, add water accounting for 10% of the total weight of the mixture to the above mixture , after stirring evenly, press and form under the tablet machine, the forming pressure is 30MPa; finally, put the pressed sample into the hydrothermal reaction kettle, hydrothermally treat at 200℃, 1.55MPa saturated steam pressure for 12h, and then dry Finally, the final sample was obtained, and its flexural strength was 26.8MPa.

Embodiment 2

[0028] First, select sepiolite as the main raw material, select industrial slaked lime as the auxiliary raw material, mix the above raw materials so that the mass of slaked lime in the mixture accounts for 28%; then, add water accounting for 30% of the total weight of the mixture to the above mixture , after stirring evenly, press molding under the tablet press, the molding pressure is 30MPa; finally, put the pressed sample into the hydrothermal reaction kettle, and hydrothermally treat it at 200°C and 1.55MPa saturated steam pressure for 12h to obtain the final The sample has a flexural strength of 16.8MPa.

Embodiment 3

[0030] First, the final samples obtained in Examples 1 and 2 were selected as experimental samples. The constant temperature and humidity box was set at a temperature of 25°C and a relative humidity of 75%, and the relative humidity in the airtight box was controlled to 75% by saturated saline solution. After reaching stability, put the final sample into the sample rack tray in the airtight box quickly, record the weight change of the sample every 10 minutes, and measure the change within 24 hours; then, compare the relative humidity in the constant temperature and humidity box and the airtight box Adjusted to 33% (adjusted by replacing the saturated salt solution in the airtight box), and then kept for 24 hours, and the weight change of the sample was recorded during the process. So far, the curve of the amount of moisture absorption and desorption of the sample in a humidity change cycle as a function of time can be obtained, that is, the characteristics of the material for ...

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Abstract

The invention relates to a method for preparing a humidity-adjusting material from loess or sepiolite. The humidity-adjusting material comprises a loess humidity-adjusting material and a sepiolite humidity-adjusting material, wherein the loess humidity-adjusting material comprises 80 to 90 percent of loess and 10 to 20 percent of slaked lime; and the sepiolite humidity-adjusting material comprises 50 to 80 percent of sepiolite and 20 to 50 percent of slaked lime. The preparation method comprises the following steps: mixing the raw materials; forming; and performing hydrothermal synthesis treatment. The humidity-adjusting material prepared from the loess and the sepiolite by a hydrothermal synthesis technology has excellent aperture distribution and has a good function of adjusting indoor humidity. The material can be applied to walls of buildings or ground materials, can effectively adjust indoor humidity, reduces the using amount of air conditioners and saves energy.

Description

technical field [0001] The invention belongs to the field of synthesis of inorganic materials, and in particular relates to a method for preparing humidity-adjusting materials by using loess or sepiolite. Background technique [0002] Relative air humidity is an important parameter to measure the indoor environment, which is of great significance to human health, indoor air quality and storage of items. Studies have shown that the most comfortable relative humidity range for humans is 40%-70%. Due to the relatively poor thermal insulation performance of buildings in our country, the indoor temperature and humidity fluctuate greatly with the external environment. Every summer and winter, in order to adjust the indoor temperature and humidity, air conditioners are used extensively in cities in our country, resulting in huge energy consumption. [0003] There have been some introductions on the development of humidity-regulating materials, such as the Chinese patent "Inorganic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/06C04B14/04
Inventor 景镇子王镇龙范俊杰濮溧
Owner TONGJI UNIV
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