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Diatomite capable of controlling humidity absorbing and releasing performance by illumination and preparation method thereof

A technology of light control and diatomite, which is applied in the field of diatomite, can solve problems such as poor humidity control effect, and achieve the effect of simple preparation method and scientific and reasonable structure

Active Publication Date: 2015-04-08
营口渤海科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to propose a method for preparing diatomite that controls the moisture absorption and desorption performance of light control in order to solve the problem that the existing diatomite has a poor humidity control effect when the temperature difference between day and night is large. The response of hygroscopic diatomite to ambient humidity can be controlled by light conditions

Method used

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  • Diatomite capable of controlling humidity absorbing and releasing performance by illumination and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] This embodiment discloses a diatomite whose moisture absorption and desorption performance is controlled by light, and its moisture absorption and desorption performance can be controlled by light conditions. The preparation method steps are as follows:

[0026] Put 500g of diatomite minerals from a certain place in Inner Mongolia in a furnace and raise the temperature to 650°C at a rate of 10°C / min and keep it warm for 2 hours to remove the residual organic matter on the surface. The analysis is as shown in Table 1:

[0027] Table 1 X-ray fluorescence spectroscopy (XRF) analysis results

[0028] chemical composition SiO 2 Al 2 o 3 Fe 2 o 3 K 2 o MgO CaO TiO 2 Na 2 o MnO Mass % 76.6 12.4 6.4 1.9 1.0 0.7 0.5 0.4 0.1

[0029] The above diatom cooled soil was placed in a toluene solution of 5% (v / v) aminopropyltriethoxysilane at 80° C. for 6 hours for amination, and then filtered and washed with ethanol.

[0030] Add...

Embodiment 2

[0033] This embodiment discloses a diatomite whose moisture absorption and desorption performance is controlled by light. The preparation method steps are as follows: the object of modification is a ceramic decorative brick with moisture absorption and desorption function prepared by sintering at high temperature using diatomite as a raw material. The mass of unmodified ceramic decorative tiles increases by 6.2% after being placed at 27°C and 83RH% relative humidity for 24 hours, and the mass decreases by 5.4% after being placed at 27°C and 33RH% relative humidity for 24 hours.

[0034] Cut ceramic decorative tiles to 100×100mm 2 And placed in anhydrous toluene solution of 5% (v / v) aminopropyltriethoxysilane, refluxed at 80° C. for 10 hours for amination, then dried in the air and washed with ethanol alternately for 3 times.

[0035] Add the aminated ceramic tiles to carboxypropyl-3,3 dimethyl-6 nitroindoline spiropyran 5%wt ethanol solution, stir and soak for 3 hours, and dry...

Embodiment 3

[0038] This embodiment discloses a diatomite whose moisture absorption and desorption properties are controlled by light. The preparation method steps are as follows: put the diatomite raw ore in a furnace to raise the temperature to 700° C. and keep it warm for 3 hours to remove residual organic matter on the surface.

[0039] Diatomaceous earth and aminopropyltriethoxysilane were placed in n-hexane, refluxed at 70°C for 12 hours, filtered and washed with ethanol. The amount of solvent required for the reflux meets the stirring requirement or immerses the diatomaceous earth. The consumption ratio of described diatomite and silane coupling agent is 1kg: 50ml;

[0040] Soak and stir the diatomite grafted with amino groups in an ethanol solution containing carboxypropyl-3,3 dimethyl-6 nitroindoline spiropyran, the surface of the diatomite grafted with spiropyran The number of spiropyran switch molecules is controlled by the soaking time. In order to realize the switch of the mo...

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Abstract

The invention provides diatomite capable of controlling the humidity absorbing and releasing performance by illumination and a preparation method thereof. The preparation method comprises the following steps: carrying out aminated modification on the diatomite by utilizing a silane coupling agent containing amino groups to obtain diatomite grafted with the amino groups, wherein the used amount ratio of the diatomite to the silane coupling agent is 1kg to 20-100ml; soaking the diatomite grafted with the amino groups in a solution containing spiropyrane molecules, and stirring, wherein the soaking time is 0.5-5 hours and the concentration of spiropyrane in the solution containing spiropyrane molecules is not less than 5%; and filtering the materials, collecting, washing and drying to obtain the diatomite capable of controlling the humidity absorbing and releasing performance by illumination. The diatomite provided by the invention has the advantages that an illumination condition can be used as a switch to control the humidity absorbing and releasing performance, and the maximum humidity absorbing and releasing capabilities can be maintained by more than 80% before modification.

Description

technical field [0001] The invention relates to diatomite technology, in particular to a diatomite capable of controlling moisture absorption and desorption by light and a preparation method thereof. Background technique [0002] There is a large amount of water molecules in the air, and the measure of the degree of water molecules is the relative humidity. Ambient humidity is an ecological environment parameter as important as temperature. For buildings, too high or too low humidity will not only affect the life of the building but also have a negative impact on the health of the occupants. For example, too high humidity can easily breed mold and accelerate the corrosion of buildings and interior decoration, while too dry can easily cause respiratory and skin allergies. For cultural relics, special medicines, shredded tobacco and other items, humidity also affects the difficulty of preservation. In addition, humidity also affects human perception of temperature, and high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 李松秦高梧李端阳任玉平崔俊峰
Owner 营口渤海科技有限公司
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