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Desiccant composition

A composition and desiccant technology, applied in the direction of dispersion particle separation, chemical instruments and methods, separation methods, etc., can solve the problems of water absorption performance limitation, influence on application, difficult leaching, etc., achieve low production cost, wide applicability, water absorption The effect of large capacity

Inactive Publication Date: 2009-10-07
HANGZHOU HOMESONG PACKGING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these inventions are limited to the research on general modified starches, especially corn modified starches, and since there are lipids in general modified starches, especially corn modified starches, they can form clathrates with starch, that is, lipids are Contained in the starch helical ring, it is not easy to leach out of the helical ring, and prevents water from penetrating into the starch granules, so its water absorption performance is limited; at the same time, due to the general modified starch, especially the corn modified starch, it is prone to retrogradation during use. Phenomenon, there is water leakage, which greatly affects its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The modified potato starch and anhydrous magnesium chloride are uniformly mixed in a mass ratio of 1:3, and packed quantitatively with moisture-permeable packaging materials as required. Wherein, the viscosity of the modified potato starch is 2000-3500 mPa·s (2% solution).

[0029] The desiccant was placed in an environment with a relative humidity of 90% at 35°C, and its moisture absorption rate was measured to be 182.3% after 30 days. Leave it for 3 months to observe that there is no water leakage.

Embodiment 2

[0031] The modified potato starch and anhydrous magnesium chloride are uniformly mixed in a mass ratio of 1:4, and packed quantitatively with moisture-permeable packaging materials as required. Wherein, the viscosity of the modified potato starch is 1000-2000 mPa·s (2% solution).

[0032] The desiccant was placed in an environment with a relative humidity of 90% at 35°C, and its moisture absorption rate was measured to be 242.5% after 30 days. Leave it for 3 months to observe that there is no water leakage.

Embodiment 3

[0034] The modified potato starch and anhydrous magnesium chloride are uniformly mixed in a mass ratio of 1:3.5, and packed quantitatively with moisture-permeable packaging materials as required. Wherein, the viscosity of the modified potato starch is 800-990 mPa·s (2% solution).

[0035] Put the desiccant in an environment with a relative humidity of 20-90% at 35°C, and measure its moisture absorption rate after 30 days. The measurement results are shown in Table 1.

[0036] Table 1: Comparison of moisture absorption capacity of desiccants under different humidity

[0037] Relative humidity

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Abstract

The invention discloses a desiccant composition, including 55-90% (weight) easy deliquescence salt and 10-45% (weight) potato modified starch, wherein, the easy deliquescence salt is anhydrous calcium chloride, anhydrous magnesium chloride or mixture of them. The invention provided desiccant has a large water absorbing capacity and excellent moisture sorption effect in a long time; and immobile after absorbing water and holds a certain tractable gel shape, convenient use, no-mould after absorbing water and good stability. The invention provided desiccant has low production cost, easy industrial production, meanwhile has advantages of wide materials sources, innocuity, degradable and wide applicability.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a desiccant, in particular to a desiccant composition containing modified potato starch. Background technique [0002] Desiccant is the most commonly used material in industrial and civil moisture-proof packaging. It achieves its purpose by absorbing water vapor, water, liquid, etc. The commonly used desiccant materials include silica gel, calcium sulfate, calcium fluoride, calcium oxide, activated carbon, alumina molecular sieve, attapulgite, montmorillonite, lithium chloride, calcium chloride and other products. [0003] Calcium chloride known to be used as a desiccant has a limited ability to absorb water. Because, the commonly used calcium chloride is dihydrated form (CaCl 2 2H 2 O), the calcium chloride becomes dissolved in its water of crystallization after absorbing water, thereby producing a solution. So one of the problems with using calcium chloride as a...

Claims

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Application Information

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IPC IPC(8): B01D53/28
Inventor 张红军
Owner HANGZHOU HOMESONG PACKGING MATERIAL
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