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Starch-based high-efficiency moisture-absorbing desiccant

A hygroscopic drying, starch-based technology, applied in the field of starch-based high-efficiency hygroscopic desiccant, can solve the problems of small moisture absorption, non-degradability, and large space occupation.

Inactive Publication Date: 2010-10-20
任风芝 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage is strong adaptability, the disadvantage is low moisture absorption, poor environmental protection (non-degradable)
[0007] However, the outstanding problems of these types of desiccants in actual use are that they are used in a large amount, take up a large space, and have a small moisture absorption capacity. Desiccant reserves space, causing great inconvenience to use

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1: Take 85 parts of pregelatinized starch, 14 parts of inorganic salt, and 1 part of gel strengthening agent, and blend according to the above-mentioned production process to obtain the product.

Embodiment 2

[0027] Example 2: Take 70 parts of pregelatinized starch, 29 parts of inorganic salt, and 1 part of gel strengthening agent, and blend them according to the above-mentioned production process to obtain the product.

[0028] Experimental verification of the moisture absorption performance of each of the above-mentioned embodiments

[0029] 1. Moisture absorption rate test under constant humidity conditions

[0030] This test is used to verify the moisture absorption rate of Example 1-2 under static constant humidity conditions.

[0031] Adjust the high and low temperature alternating humid heat box to "fixed value test", humidity: 98%, temperature 30°C, put 2 grams of packaged examples 1 and 2 into the humid heat box respectively, measure their weight after 12 hours, and calculate Moisture absorption rate. After 60 days, measure its weight and calculate the moisture absorption rate.

[0032] The comparative example contrasted with embodiment is:

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Abstract

The invention provides a starch-based high-efficiency moisture-absorbing desiccant, which has high moisture-absorbing efficiency, long-time action and great moisture-absorbing quantity and comprises the main components of pregelatinized starch, inorganic salt and a gel reinforcing agent. The main processing technique thereof comprises the following steps of: (1) preparation of the gelatinized starch: taking starch to be mixed in cold water, stirring to form emulsus suspension, and heating to lead the starch to be changed to be doped; (2) grinding and crushing of the inorganic salt and the gel reinforcing agent; and (3) alloying of the pregelatinized starch, the inorganic salt and the gel reinforcing agent. The starch-based high-efficiency moisture-absorbing desiccant has the main advantages of: (1) long moisture-absorbing time: moisture absorption can be continuously conducted for more than 60 days under the condition of 100%RH; (2) great moisture-absorbing quantity: the total moisture-absorbing quantity can achieve more than two times of self weight; (3) formation of the gel after moisture absorption: liquid cannot be formed to overflow a package to pollute devices; (4) environmental protection and low toxicity: no harmful influence exists on a human body and the environment; and (5) by comparison with the conventional desiccating agent such as silica gel and the like: the usage is reduced by 7 times.

Description

technical field [0001] The invention relates to a starch-based high-efficiency moisture-absorbing desiccant, which belongs to the technical field of moisture-proof and moisture-control. Background technique [0002] A desiccant is a dehydrating agent that absorbs moisture from the atmosphere. Its drying principle is to physically absorb water molecules in its own structure or chemically absorb water molecules and change its chemical structure to become another substance. Because of its low price and good moisture absorption effect, it is widely used in moisture-proof packaging of various materials and moisture-controlling materials for containers. [0003] At present, the types of desiccants widely used mainly include silica gel (primary color, discoloration) desiccant, clay desiccant, molecular sieve desiccant, etc. [0004] (1) The main component of silica gel desiccant is silica, which is purified and processed from natural minerals into granular or beaded shapes. Its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/28B01J20/24
Inventor 任风芝伍志强
Owner 任风芝
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