KR20210038100A - Super absorbent antibacterial desiccant composition and a super absorbent antibacterial desiccant including the same - Google Patents

Abstract

A super absorbent antibacterial desiccant composition of the present invention contains a deliquescent material, a super absorbent polymer (SAP), a PH control material, starch, a preservative and an antibacterial material.

Description

High hygroscopic antimicrobial desiccant composition and high hygroscopic antimicrobial desiccant comprising the same {SUPER ABSORBENT ANTIBACTERIAL DESICCANT COMPOSITION AND A SUPER ABSORBENT ANTIBACTERIAL DESICCANT INCLUDING THE SAME}

The present invention relates to a highly hygroscopic antimicrobial desiccant composition and a highly hygroscopic antimicrobial desiccant comprising the same, and more particularly, to a highly hygroscopic antimicrobial desiccant comprising a super absorbent polymer, a deliquescent material, a PH adjusting material, starch and a preservative.

A desiccant refers to a material that can absorb water vapor directly from the surrounding air because it has a strong affinity for moisture, and is also called as a desiccant, desiccant, and dehumidifying agent. There are various types of desiccants such as silica gel, bentonite, zeolite, and calcium chloride, and these desiccants are used throughout the industry to reduce damage from moisture when packaging raw materials and products.

Silica is silicon dioxide, and silica gel is a transparent glassy granular solid made by washing and drying a material obtained by treating an aqueous sodium silicate solution with hydrochloric acid or sulfuric acid in a state in which water molecules are attached to silicic acid. Silica gel becomes active when it contains 2 to 10% water, and it absorbs moisture well due to its large surface area in contact with moisture in the air due to the numerous fine pores on the surface. Therefore, it is widely used as a desiccant for food processed products by taking advantage of these properties.

However, silica gel has a limitation in absorbing moisture, so when it reaches a certain point (depending on the product, or depending on the type A/B, but usually absorbs about 35% to 70% of the weight of the silica gel), it has a moisture-proof effect. There is a problem that does not occur, and there is a problem that it is difficult to reuse.

Due to this limitation, it is necessary to use a large amount of desiccant in an environment with a large product or a large packaging space. Accordingly, it is required to reduce the volume and develop a desiccant having excellent moisture absorption capacity in the overall industry.

The present invention has been conceived to solve the above-described problems, and an object of the present invention is to provide a highly hygroscopic antibacterial desiccant capable of antibacterial action while preventing the problem of liquid flowing down during/after use and excellent in hygroscopic ability. have.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve these problems, according to an embodiment of the present invention, there is provided a highly hygroscopic antibacterial desiccant composition comprising a deliquescent substance, a super absorbent polymer (SAP), a PH adjusting substance, starch, a preservative and an antibacterial substance.

In some embodiments, with respect to 100 parts by weight of the highly hygroscopic antimicrobial desiccant composition, the highly hygroscopic antimicrobial desiccant composition is 60 to 70 parts by weight of the deliquescent material, 10 to 20 parts by weight of the super absorbent polymer, and the PH control material 1 It may comprise ~ 10 parts by weight, 3 to 15 parts by weight of the starch, 1 to 10 parts by weight of the preservative, and 2 to 12 parts by weight of the antibacterial substance.

Here, the deliquescent material is at least one material selected from _{MgCl 2} and CaCl _{2 , the PH control material is at least one material selected from Na (OH) and NaCl 2} , and the starch is corn starch, and the antibacterial The material may be at least one material selected from CaO and silver nano powder. The deliquescent material contains the MgCl ₂ and the CaCl ₂ in a weight ratio of 1.5:1 to 2.5:1, the antibacterial material contains the CaO and the silver nano powder in a weight ratio of 2:1 to 3:1, the The weight ratio of the super absorbent polymer and the PH control material may be 2.5:1 to 3.5:1, and the weight ratio of the starch and the preservative may be 1.5:1 to 3.5:1.

In some embodiments, the deliquescent material includes MgCl ₂ and CaCl ₂ , the PH control material includes Na (OH) and NaCl ₂ , and the antimicrobial material includes CaO and silver nano powder, and the high hygroscopicity Based on 100 parts by weight of the antimicrobial desiccant composition, the highly hygroscopic antibacterial desiccant composition is 35 to 45 parts by weight of _{MgCl 2 , 15 to 25 parts by weight of CaCl 2} , 10 to 20 parts by weight of the super absorbent polymer, 1 to Na(OH) It may include 9 parts by weight, 3 to 15 parts by weight of starch, 1 to 9 parts by weight of preservative, 1 to 9 parts by weight of CaO, and 1 to 3 parts by weight of silver nano powder.

In order to solve this problem, according to an embodiment of the present invention, there is provided a highly hygroscopic antimicrobial desiccant comprising a packaging material containing the highly hygroscopic antimicrobial desiccant composition and the highly hygroscopic antimicrobial desiccant composition therein and formed of a porous material.

According to the embodiments of the present invention, the highly hygroscopic antimicrobial desiccant contains _{a deliquescent substance such as MgCl 2} and CaCl ₂ , a super absorbent polymer, a PH control substance such as NaOH, starch, and a preservative, so that the moisture absorption ability is excellent and absorbed at the same time A highly hygroscopic antibacterial desiccant can be prepared that also has excellent moisturizing ability to prevent moisture from leaking into the liquid phase.

Further, the highly hygroscopic antimicrobial desiccant contains antibacterial substances such as CaO and silver nano powder, so that it has antibacterial performance at the same time as dehumidification, so that bacterial growth can also be suppressed in a humid environment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments to be posted below, but may be implemented in various different forms, and only these embodiments make the posting of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used with meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically.

In addition, in the present specification, the singular form may also be included in the plural form unless specifically stated in the phrase. As used herein, "comprises" and/or "comprising" refers to the presence of one or more other components, steps, actions and/or elements in which the recited component, step, operation and/or element is Or does not preclude additions.

Hereinafter, a highly hygroscopic antimicrobial desiccant composition according to the present invention and a highly hygroscopic antimicrobial desiccant comprising the same will be described in detail.

A highly hygroscopic antimicrobial desiccant composition according to an embodiment of the present invention includes a deliquescent material, a super absorbent polymer (SAP), a PH control material, starch, a preservative, and an antibacterial material.

The highly hygroscopic antimicrobial desiccant composition contains about 60% to 70% (preferably, about 65% to 70%) of the deliquescent material, and about 10% to 20% (preferably, about 15%) of the superabsorbent polymer. To 20%), the PH control material is approximately 1% to 10% (preferably, approximately 3% to 7%), the starch is approximately 3% to 15% (preferably, approximately 10% to 14%) , The preservative may be 1% to 10% (preferably, approximately 3% to 7%), and the antimicrobial material may be contained approximately 2% to 12% (preferably, approximately 5% to 9%).

The deliquescent material is, for example, at least one selected from _{LiCl, NaCl, KCl, MgCl 2} , CaCl ₂ , ZnCl ₂ , NaOH, KOH, K ₂ CO ₃ , KH ₂ PO ₄ , KMgCl ₃ ·6H _{2 O and LiBr} It can be a substance. Preferably, the deliquescent material may be at least one material selected from _{MgCl 2} and CaCl _2. More preferably, the deliquescent material may include MgCl ₂ and CaCl ₂ , and the MgCl ₂ and CaCl ₂ may be included in a weight ratio of about 1.5:1 to 2.5:1, preferably about 2:1.

The PH control material may be, for example, any one of a hydroxide such as Na(OH) composed of an element and a negatively charged hydroxide ion (OH-), or a chloride such as _{NaCl 2 composed of chlorine and other elements.} Preferably, the PH control material may be at least one material selected from _{Na(OH) and NaCl 2.} More preferably, the PH control material may be Na (OH).

Meanwhile, the weight ratio of the super absorbent polymer and the PH control material included in the super hygroscopic antimicrobial desiccant composition may be about 2.5:1 to 3.5:1, preferably about 3:1. The super absorbent polymer may be selected from, for example, acrylic acid crosslinked polymers, acrylamide crosslinked polymers, copolymerized polymers in which acrylic acid and acrylamide are weakly crosslinked, proppolymers of starch, crosslinked starch derivatives, cellulose derivatives, etc. It is not limited thereto.

The starch may be, for example, at least one selected from rice starch, wheat starch, corn starch, potato starch, and tapioca. Preferably, the starch may be corn starch. Since the starch acts as a coagulant, it interacts with other compositions, such as the deliquescent material and the super absorbent polymer, so as to clump together, thereby enhancing the dehumidification effect.

Meanwhile, in order to prevent spoilage of the starch, a preservative may be included in the highly hygroscopic antimicrobial desiccant composition. The preservative may be ascorbic acid, tocopherol, nitrite salt, benzoic acid (benzoic acid), sorbic acid salt, citric acid, sodium citrate, or a synthetic preservative, but is not limited thereto. The weight ratio of the starch and the preservative contained in the highly hygroscopic antimicrobial desiccant composition may be about 1:1 to 5:1, preferably about 1.5:1 to 3.5:1.

The antibacterial material may include, for example, metal nanoparticles and/or inorganic metal antibacterial agents. Preferably, the antimicrobial material may be at least one material selected from CaO and silver nano powder. More preferably, the antimicrobial material includes CaO and silver nano powder, and the CaO and silver nano powder may be included in a weight ratio of about 2:1 to 3:1, preferably about 2.5:1.

Exemplary embodiments are described in more detail through the following examples and comparative examples. The following examples are intended to make the present invention more clear and easier to understand, so the scope of the present invention is not limited by these examples.

Example 1

MgCl ₂ 40g, CaCl ₂ 20g, super absorbent polymer 15g, NaOH 5g, corn starch 10g, preservative 3g, CaO 5g and 100g of a highly hygroscopic antibacterial desiccant composition comprising 2g of silver nano powder was prepared.

Example 2

Excluding NaOH in Example 1, MgCl ₂ 40g, CaCl ₂ 20g, super absorbent polymer 20g, corn starch 10g, preservatives 3g, CaO 5g, and 100g of a highly hygroscopic antibacterial desiccant composition comprising 2g of silver nano powder was prepared.

Example 3

MgCl ₂ 20g and CaCl ₂ 40g, super absorbent polymer 20g, NaOH 8g, corn starch 3g, preservative 2g, CaO 5g, and 100g of a highly hygroscopic antibacterial desiccant composition comprising 2g of silver nano powder was prepared.

Comparative Example 1

A silica gel product (Type B silica gel) sold as a dehumidifying agent on the market was used without processing after opening.

Experimental Example 1: Evaluation of moisture absorption properties and moisturizing properties

The moisture absorption test was carried out by putting the highly hygroscopic antibacterial desiccant prepared in Examples 1 to 3 and the desiccant of Comparative Example 1 in each desiccator controlled at a temperature of 50°C and a relative humidity of 90% for 550 hours. After storage, the moisture absorption was confirmed by measuring the weight of the desiccant. The desiccant compositions of Examples and Comparative Examples were contained in the same packaging material having a porosity of about 2000 CU in units of Coresta.

The moisturizing test was performed to confirm the degree of leakage of the moisture absorbed in the examples into the liquid phase, and the moisturizing test was a high hygroscopic antibacterial desiccant prepared in Examples 1 to 3 in a hygroscopic state in which the moisture absorption test was completed and Comparative Example 1 The desiccant was stored for 72 hours at a temperature of 30° C. and a relative humidity of 50%, and the weight of the desiccant was measured.

The results of the moisture absorption test and the moisture absorption test are as shown in Table 1 below, and the moisture absorption (%) and moisture absorption (%) in Table 1 were calculated according to the following calculation formula.

Moisture absorption (%) = weight of absorbed water (g) / dehumidifying agent 100g

Moisturizing amount (%) = (weight of absorbed water (g)-weight of liquefied leaked water (g)) / weight of absorbed water (g)

division Moisture absorption (%) Moisturizing amount (%) Example 1 445 99.2 Example 2 430 86.3 Example 3 411 86.5 Comparative Example 1 70 50.0

As shown in Table 1, the dehumidifying effect was exhibited in both the desiccants according to Examples 1 to 3 and Comparative Example 1, and it was confirmed that the numerical difference in the amount of moisture absorption and the amount of moisture in each example appeared. In particular, it was confirmed that the moisture absorption and moisturizing ability of Example 1 containing 40 g of _{MgCl 2 , 20 g of CaCl 2} , 15 g of super absorbent polymer, 5 g of NaOH, 10 g of corn starch, 3 g of preservatives, 5 g of CaO, and 2 g of silver nano powder was excellent. When referring to the results of each example, in Examples 1 and 2 in which there was a difference in the presence or absence of NaOH, the difference in the moisture absorption ability did not show a significant value, but the difference in the moisturizing ability was remarkable, through which the moisture absorption of the super absorbent polymer It was confirmed that the moisturizing ability was affected by the presence or absence of sodium hydroxide. In addition, when looking at the results in Examples 1 and 3 in which all components were the same but the content ratio was different, it was confirmed that differences in moisture absorption and moisturizing ability occurred according to the composition ratio of each component, of which moisture absorption ability the difference between MgCl ₂ and it is judged to be due to the composition difference of CaCl _2, the difference of moisturizing ability, the composition ratio of the MgCl ₂ and CaCl PH value of the _second full material when only non-water-absorbing composition ratio difference between the super-absorbent polymer and corn starch It is judged to be due to the difference.

Experimental Example 2: Evaluation of antibacterial properties

An antimicrobial test was conducted on the highly hygroscopic antimicrobial desiccant prepared in Example 1. The highly hygroscopic antimicrobial desiccant of Examples 2 and 3 contained the same amount of CaO and silver nano powder as in Example 1, so the antibacterial test was omitted.

Test strain Contact time Number of bacteria (CFU/mL) Sterilization power (%) Control test solution Test liquid Escherichia coli
(E. coli) Early 3 x 10^6 99.9 1 hours 3 x 10^6 <100 Staphylococcus aureus
(Yellow Staphylococcus) Early 2 x 10^6 99.9 1 hours 2 x 10^6 <100 Salmonella typhimurium
(Zutipus bacterium) Early 2 x 10^6 99.9 1 hours 2 x 10^6 <100 Pseudomonas aeruginosa
(Pseudomonas aeruginosa) Early 4 x 10^6 99.9 1 hours 4 x 10^6 <100

The antibacterial test results are shown in Table 2, and as shown in Table 2, it can be seen that the highly hygroscopic antimicrobial desiccant according to Example 1 has antibacterial performance. Meanwhile, the highly hygroscopic antimicrobial desiccant composition is formed of a porous material. It may be accommodated inside the packaging material, and even if the highly hygroscopic antimicrobial desiccant composition has the same composition, a difference in moisture-proof ability may occur depending on the packaging material.

Accordingly, in the present invention, in order to maximize the hygroscopicity and moisturizing ability of the above-described highly hygroscopic antimicrobial desiccant composition, a highly hygroscopic antimicrobial desiccant packaging material suitable for the highly hygroscopic antimicrobial desiccant composition of the present invention is additionally proposed.

Example 4

The highly hygroscopic antibacterial desiccant of Example 1 contained in a packaging material having a porosity of about 50 CU was used.

Example 5

The highly hygroscopic antibacterial desiccant of Example 1 contained in a packaging material having a porosity of about 2000 CU was used.

Example 6

The highly hygroscopic antibacterial desiccant of Example 1 contained in a packaging material having a porosity of about 10000 CU was used.

Example 7

The highly hygroscopic antimicrobial desiccant of Example 3 contained in a packaging material having a porosity of about 2000 CU was used.

Example 8

The highly hygroscopic antimicrobial desiccant of Example 3 contained in a packaging material having a porosity of about 10000 CU was used.

Experimental Example 3: Evaluation of moisture-absorbing properties and moisturizing properties according to porosity of packaging materials

The experiment for evaluating the moisture absorption and moisture absorption characteristics according to the porosity of the packaging material was carried out in the same conditions and methods as the moisture absorption and moisture absorption tests performed in Experimental Example 1.

division Moisture absorption (%) Moisturizing amount (%) Example 4 381 99.9 Example 5 445 99.2 Example 6 466 94.5 Example 7 411 86.5 Example 8 440 81.0

As shown in Table 3, it was confirmed that a significant difference appeared in the moisture absorption and moisturizing ability of the highly hygroscopic antimicrobial desiccant according to the porosity of the packaging material. In Examples 4 to 7, as the porosity of the packaging material increased, the moisture absorption capacity tended to increase, whereas the moisture absorption capacity tended to decrease in general. The porosity of the packaging material in consideration of the composition of the highly hygroscopic antimicrobial desiccant in order to improve the hygroscopic ability and moisture-proof ability, generalized through the above experiment, is shown in Equation 1 below.

(Here, P is the porosity (unit: CU, Coresta) of the packaging material, ST_W is the weight of the starch, SAP_W is the weight of the super absorbent polymer, and PH_W is the weight of the PH control material.)

Those of ordinary skill in the technical field related to the present embodiment will appreciate that it may be implemented in a modified form without departing from the essential characteristics of the above-described description. Therefore, the disclosed methods should be considered from an explanatory point of view rather than a limiting point of view. The scope of the present invention is shown in the claims rather than the above description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (7)

A highly hygroscopic antibacterial desiccant composition comprising a deliquescent substance, a super absorbent polymer (SAP), a PH control substance, starch, a preservative and an antibacterial substance.
The method of claim 1,
With respect to 100 parts by weight of the highly hygroscopic antimicrobial desiccant composition, the highly hygroscopic antimicrobial desiccant composition includes 60 to 70 parts by weight of the deliquescent material, 10 to 20 parts by weight of the super absorbent polymer, 1 to 10 parts by weight of the PH control material, the 3 to 15 parts by weight of starch, 1 to 10 parts by weight of the preservative, and 2 to 12 parts by weight of the antibacterial substance.
The method of claim 2,
The deliquescent material is at least one material selected from _{MgCl 2} and CaCl _{2 , the PH control material is at least one material selected from Na (OH) and NaCl 2} , the starch is corn starch, and the antimicrobial material is CaO and silver nano powder, characterized in that at least one or more materials selected from, high hygroscopic antimicrobial desiccant composition.
The method of claim 3,
The deliquescent material contains the MgCl ₂ and the CaCl ₂ in a weight ratio of 1.5:1 to 2.5:1, and the antibacterial material contains the CaO and the silver nano powder in a weight ratio of 2:1 to 3:1,
The weight ratio of the super absorbent polymer and the PH adjusting material is 2.5:1 to 3.5:1, and the weight ratio of the starch and the preservative is 1.5:1 to 3.5:1.
The method of claim 1,
The deliquescent material includes MgCl ₂ and CaCl ₂ , the PH control material includes Na(OH) and NaCl ₂ , and the antimicrobial material includes CaO and silver nano powder,
Based on 100 parts by weight of the highly hygroscopic antimicrobial desiccant composition, the highly hygroscopic antimicrobial desiccant composition includes 35 to 45 parts by weight of _{MgCl 2 , 15 to 25 parts by weight of CaCl 2} , 10 to 20 parts by weight of the super absorbent polymer, Na(OH ) 1 to 9 parts by weight, starch 3 to 15 parts by weight, 1 to 9 parts by weight of preservative, 1 to 9 parts by weight of CaO, and 1 to 3 parts by weight of silver nano powder.
The method according to claim 1 to 5,
A highly hygroscopic antimicrobial desiccant comprising a packaging material containing the highly hygroscopic antimicrobial desiccant composition and the highly hygroscopic antimicrobial desiccant composition therein and formed of a porous material.
The method of claim 6,
The porosity of the packaging material, the weight of the starch, the weight of the super absorbent polymer, and the weight of the PH control material have a relationship of Equation 1, a highly hygroscopic antibacterial desiccant.
[Equation 1]

(Where P is the porosity (unit: CU, Coresta) of the packaging material, ST_W is the weight of the starch, SAP_W is the weight of the super absorbent polymer, and PH_W is the weight of the PH control material.)