Composite humidity adjusting material

Abstract

The invention discloses a composite humidity adjusting material. The composite humidity adjusting material is prepared from the following components in parts by weight: 7-9 parts of CaCl<2>.6H<2>O, 3-5 parts of ZnSO<4>.7H<2>O, 2-4 parts of shell powder, 1-3 parts of xonotlite, 3-6 parts of garnet, 3-6 parts of spinel, 4-6 parts of sodium carboxymethyl starch, 4-8 parts of carboxymethyl cellulose, 5-7 parts of sodium polyacrylate, 4-7 parts of chitosan, 1-3 parts of sodium lignosulfonate, 1-3 parts of sodium alginate and 0.3-0.7 part of nanometer silicon dioxide. The composite humidity adjusting material disclosed by the invention has the characteristics of being high in humidity volume and high in humidity sucking and discharging rate, and is a material with broad development prospects.

Description

technical field [0001] The invention relates to a composite humidity control material, which belongs to the technical field of humidity control materials. Background technique [0002] Air humidity not only has an important impact on air quality, human health and the storage of items, but also plays an important role in energy saving and emission reduction. This is because the air humidity ranges from 40% to 60%, the number of bacteria and viruses is the least, and the possibility of various diseases and various chemical effects harmful to humans is the lowest. At the same time, air humidity can measure the degree of active humidity adjustment. energy consumption. However, active humidity adjustment consumes artificial energy, pollutes the environment and destroys the ecology, and is not in line with the sustainable development strategy. [0003] In order to comply with the strategy of sustainable development, people have found: a passive ecological method to regulate humi...

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Problems solved by technology

Although silica gel is an effective humidity control material, its application is greatly limited due to its serious hysteresis in the water adsorption and desorption cycle; although inorganic salt humidity control materials can Salt saturated solution is used to maintain the humidity of the space, but since most solid inorganic salts will slowly deliquesce with the increase of moisture absorption, and are unstable at room temperature, salting out is very easy to occur, and it will become more and more serious with the extension of time, thus It pollutes the space for storing items, which limits its application; although inorganic mineral humidity-controlling materials have many internal pores, large specific surface area, and strong adsorption capacity, their wet capacity is small, which limits their application. Restrictions: Although organic moisture-controlling materials have a large amount of moisture absorption and a fast moisture absorption rate, their application is also limited to a certain extent because of their small amount of moisture release and slow rate of moisture release.

[0004] A single humidity-regulating material cannot have the characteristics of high moisture absorption capacity and large moisture absorption / release rate at the same time, and it is difficult to meet people's requirements. The composite humidity-conditioning material has the advantages of large moisture capacity and high moisture absorption and release rate. , has become a research hotspot of humidity control materials

At present, although composite humidity control materials include: inorganic salt / organic polymer, inorganic salt / inorganic mineral, inorganic salt / organic polymer / inorganic mineral composite humidity control material, but the humidity capacity, moisture absorption and desorption rate of these composite humidity control materials not so ideal

This hinders the promotion and application of composite humidity control materials to some extent.

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