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Preparation method of peat-moss-based composite humidifying material

A technology of humidity-regulating material and sphagnum moss, which is applied in the field of composite functional material preparation, can solve the problems of unsatisfactory comprehensive performance of humidity-regulating materials, and achieve the effects of good humidity-controlling performance, good water resistance and low production cost

Active Publication Date: 2017-03-22
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The humidity control materials are mainly divided into silica gel, inorganic salt humidity control materials, inorganic mineral humidity control materials, organic polymer humidity control materials and composite humidity control materials, including zeolite, diatomite, sepiolite, bentonite, attapulgite The research and application of inorganic mineral humidity-controlling materials such as stone and perlite are the most widely used in the field of building materials, but the comprehensive performance of single-component humidity-controlling materials is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Cut the natural sphagnum moss into a fine 3mm length, and grind the natural diatomaceous earth to 200 mesh. Mix 95% of iron and steel plant slag and 5% ultra-fine silicon powder evenly, which is the inorganic additive. Mix peat moss, natural diatomaceous earth and inorganic additives at a mass ratio of 1:8:2, and add water to control the moisture content of the mixture at 40%. After mixing evenly, extrude the sheet with an extruder. The sheet is maintained at room temperature and relative humidity of about 60% for 20 days, that is, a composite moisture-conditioning material with maximum moisture absorption and desorption equilibrium moisture content of 25.5% and 21.6%, compressive strength of 5.5MPa, and softening coefficient of 0.70 is obtained. .

Embodiment 2

[0017] Cut the natural sphagnum moss into a fine 4mm length, and grind the natural sepiolite to 220 mesh. Mix 97% of iron and steel plant slag and 3% ultra-fine silicon powder evenly, which is the inorganic additive. Mix peat moss, natural sepiolite and inorganic additives in a mass ratio of 1:6:2, and add water to control the moisture content of the mixture at 45%. 8mm thick plastering layer. The plastering layer was cured for 18 days at room temperature and a relative humidity of about 60%, and a composite moisture-conditioning material with maximum moisture absorption and desorption equilibrium moisture content of 30.8% and 28.2%, compressive strength of 6.0MPa, and softening coefficient of 0.65 was formed. Apply top coat.

Embodiment 3

[0019] Cut the natural sphagnum moss into a fine 2mm length, and grind the natural zeolite to 180 mesh. Mix 93% iron and steel plant slag and 7% superfine silicon powder evenly, which is the inorganic additive. Mix peat moss, natural zeolite and inorganic additives in a mass ratio of 1:10:2, and add water to control the moisture content of the mixture at 32%. After mixing, put it into a mold and press it into a 300mm×300mm×30mm sheet. The board was cured at room temperature and relative humidity of about 60% for 21 days, and a composite humidity-regulating board with maximum moisture absorption and desorption equilibrium moisture content of 21% and 19.3%, compressive strength of 5.0MPa, and softening coefficient of 0.75 was formed.

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Abstract

The invention relates to a preparation method of a peat-moss-based composite humidifying material. The method comprises the following steps: (1) cutting natural peat moss to the length of 1-5mm; (2) grinding natural diatomite, meerschaum or zeolite to 180-220 meshes; (3) uniformly mixing 93-97 wt% of steel plant slag and 3-7 wt% of superfine silicon powder to obtain an inorganic additive; (4) uniformly mixing the peat moss in the step (1), the natural diatomite, meerschaum or zeolite in the step (2) and the inorganic additive in the step (3) according to the mass ratio of 1:13:2-1:6:2, adding water into the mixture to control the water content at 28-50%, uniformly mixing, filling the mixture into a mold, and carrying out mold pressing to obtain the product; and (5) curing at normal temperature under the relative humidity of 40-75% for 14-21 days. The peat-moss-based composite humidifying material has the advantages of energy saving, low production cost, favorable humidifying property, high strength, favorable water resistance and the like.

Description

technical field [0001] The invention belongs to the field of composite functional material preparation. Background technique [0002] The relative humidity of indoor air has a great impact on human health. Humidity-adjusting materials can use their own moisture absorption and desorption properties to automatically adjust the relative humidity of the air and improve the indoor environment of buildings and human comfort. Humidity-regulating materials refer to materials that automatically adjust the relative humidity of the air by sensing changes in the air humidity in the conditioned space by relying on their own moisture absorption and desorption properties without resorting to any artificial energy and mechanical equipment. If you want to control the indoor relative humidity in a reasonable range, there must be a hysteresis between the moisture absorption and desorption of the humidity control material, and the hysteresis is large enough, and the hysteresis interval is small...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00C04B16/02
CPCC04B16/02C04B30/00C04B2111/00017C04B2201/50C04B14/08C04B18/142C04B18/146C04B22/002C04B14/042C04B14/047
Inventor 胡明玉付超吴琼
Owner NANCHANG UNIV
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