KR102369274B1 - Composition containing shell powder and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a composition containing shell powder and a method for manufacturing the same, and more particularly, relates to a composition containing shell powder which recycles discarded shells to easily solve environmental problems, as well as has excellent mechanical strength, durability, and chemical resistance to be used as interior decoration, and a method for manufacturing the composition. To this end, the manufacturing method includes a step of preparing shells, and washing and drying the same; a step of pulverizing the washed and dried shells to prepare shell powder; and a step of mixing and stirring the shell powder with purified water, mineral powder, and a binder to form a paste-like mixture. According to the present invention, sea contamination can be prevented.

Description

Composition comprising shell powder and method for manufacturing the same

The present invention relates to a composition containing shell powder and a method for manufacturing the same, and more particularly, to easily solve environmental problems by recycling discarded shells, as well as excellent mechanical strength, durability, and chemical resistance for interior decoration It relates to a composition comprising shell powder, which can be utilized for materials, and a method for producing the composition.

In general, shells, which are one of industrial wastes, generate about 280,000 tons annually around the southern coast, and some of them are recycled for fertilizer or aquaculture using shells, but most of them are being discarded. In particular, these shells cannot be buried on the ground, burned, or thrown into the sea, and about 100,000 tons of shells left or dumped without permission generate an unbearable stench, causing complaints from local residents. It is emerging as a social problem.

The main component of the shell is calcium carbonate, which has excellent thermal insulation performance like gypsum board and excellent mechanical properties, so it has the potential to be utilized as building materials, industrial materials, and the like.

However, the current construction market aims only for construction with low-cost products without considering the environmental problem of carbon dioxide generated in the process of producing construction and interior materials, It is not being considered.

In addition, the supply and demand of sand, which is an essential raw material for interior materials, has become a problem, and even sea sand is being used, and the limited amount of sand is gradually being depleted.

Currently, there is a technology for interior materials using shells, but there are cases of commercialization due to the complexity of expensive facilities and processes for the high-temperature firing process to remove odors and impurities, and the complexity of the process and profitability for strong chemical pretreatment. It is a difficult situation to find. In particular, the chemical pretreatment process may have an environmental problem of generating strong acid and strong alkali waste, and there is a limit to practical commercialization due to the limitations of methods for manufacturing various building materials.

In addition, according to the recycling of industrial waste, it is important to manufacture a safe product that does not release eight heavy metals (lead, mercury, cadium, barium, chromium, arsenic, selenium, antimony). there is no situation.

Accordingly, it is required to develop a new material that can be used for interior materials with high mechanical strength, durability, and chemical resistance while being able to use shells, which are industrial wastes.

Republic of Korea Patent Publication No. 10-1374841

The present invention is to solve the above problems, and has excellent mechanical strength, so it can be used variously as interior and exterior materials for construction, especially interior materials, and has excellent antibacterial properties, temperature and humidity control properties, and deodorization properties. An object of the present invention is to provide a method for preparing a composition containing shell powder, which can be used as a substitute for

These and other objects and advantages of the present invention will become apparent from the following description of preferred embodiments.

The purpose is to prepare the shell, washing and drying steps; pulverizing the washed and dried shells to prepare shell powder; and mixing and stirring the shell powder with purified water, mineral powder, and a binder to form a paste-type mixture.

Specifically, the mixture may include 10 to 50% by weight of purified water, 10 to 60% by weight of shell powder, 10 to 40% by weight of mineral powder, and 0.1 to 10% by weight of a binder.

Specifically, the mineral powder may include at least one selected from the group consisting of gypsum powder, volcanic stone powder, germanium powder, elvan powder, silica powder, tourmaline powder, and combinations thereof.

According to the present invention, it is possible to recycle shells that are aggravating marine pollution as marine waste, thereby preventing sea pollution, as well as excellent flexural and compressive strength, and excellent antibacterial properties, temperature and humidity control properties, and deodorization properties. It is possible to prepare a composition that can be used as an interior and exterior material, particularly an interior material, during building construction.

However, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a flowchart illustrating a method for preparing a composition including shell powder according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to embodiments and drawings of the present invention. It will be apparent to those of ordinary skill in the art that these examples are merely presented as examples to explain the present invention in more detail, and that the scope of the present invention is not limited by these examples. .

Further, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and in case of conflict, this specification, including definitions will take precedence.

In order to clearly explain the invention proposed in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are assigned to similar parts throughout the specification. And, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, "unit" described in the specification means one unit or block that performs a specific function.

In each step, identification numbers (first, second, etc.) are used for convenience of description, and identification numbers do not describe the order of each step, and each step does not clearly describe a specific order in context. It may be performed differently from the order specified above. That is, each step may be performed in the same order as the specified order, may be performed substantially simultaneously, or may be performed in the reverse order.

Hereinafter, embodiments and examples of the present application will be described in detail with reference to the accompanying drawings. However, it may not be limited to these embodiments and examples and drawings of the present application.

One aspect of the present application, preparing a shell, washing and drying steps; pulverizing the washed and dried shells to prepare shell powder; and mixing and stirring the shell powder with purified water, mineral powder, and a binder to form a paste-like mixture.

According to the present invention, it is possible to recycle shells that are aggravating marine pollution as marine waste, thereby preventing sea pollution, as well as excellent flexural and compressive strength, and excellent antibacterial properties, temperature and humidity control properties, and deodorization properties. It is possible to prepare a composition that can be used as an interior and exterior material, particularly an interior material, during building construction.

Hereinafter, a method for preparing a composition comprising the shell powder according to the present invention will be described in detail with reference to FIG. 1 .

First, the shells are prepared, washed and dried. The shell refers to the shell of one of the industrial wastes, for example, scallops, clams, oysters, clams, lilies, abalone, beetles, and one or more shells selected from the group consisting of combinations thereof. may include

In one embodiment, before the step of washing and drying the shell, the step of aging by immersing the shell in an aqueous solution containing an organic acid and garlic powder may be further included. By immersing the shell in an aqueous solution containing an organic acid and garlic powder, it is possible to exert the effect of removing the odor and microorganisms remaining in the shell. The organic acid may be used without limitation, but may include, for example, at least one selected from the group consisting of acetic acid, lactic acid, oxalic acid, malic acid, ascorbic acid, and combinations thereof.

In one embodiment, the step of immersing in an aqueous solution containing the organic acid and garlic powder may be performed for about 1 day to about 30 days. If the immersion step is performed for less than about 1 day, the odor contained in the shell may not be sufficiently removed, and if it exceeds about 30 days, the shell is excessively decomposed by the acid component, and the composition to be prepared later. Physical properties may be deteriorated.

Next, the washed and dried shells are pulverized to prepare shell powder.

In one embodiment, the pulverization may be characterized in that it is performed by a method selected from the group consisting of a ball mill, a wear mill, an airflow pulverizer, a hammer mill, a roller mill, and combinations thereof, specifically, a ball mill It may be carried out in a speed range of about 100 to about 500 rpm using

In one embodiment, when the grinding is performed using a ball mill, the diameter size of the steel balls used in the ball mill may be in the range of about 1 to about 10 nm.

In one embodiment, the shell powder prepared through the pulverization may be characterized in that it has a size of about 50 to about 200 mesh. If the size of the shell powder is less than about 50 mesh, the surface of the prepared composition may not be smooth, and if it exceeds about 200 mesh, agglomeration may occur in the step of forming the mixture later.

Next, the shell powder is mixed with purified water, mineral powder, and a binder to form a paste-like mixture.

In one embodiment, the mixture comprises about 10 to about 50 weight percent purified water, about 10 to about 60 weight percent shell powder, about 10 to about 40 weight percent mineral powder, and about 0.1 to about 10 weight percent binder. can be characterized as

As a component of the composition, the mineral powder may serve as a binder to bind the components to each other while providing sufficient mechanical strength. For example, the mineral powder may include at least one selected from the group consisting of gypsum powder, volcanic stone powder, germanium powder, elvan powder, silica powder, tourmaline powder, and combinations thereof, specifically gypsum powder may include

In one embodiment, the mineral powder may be included in an amount of about 10 to about 40 wt% based on the total weight of the mixture. If the mineral powder is included in an amount of less than about 10% by weight, the surface of the composition may not be smooth, and when it exceeds about 40% by weight, mechanical strength may rather decrease.

As a component of the composition, the binder is added to improve the miscibility between the components and to increase the viscosity of the formed mixture, and may include food additives. Accordingly, the composition to be prepared can exhibit not only eco-friendliness by including edible food additives as a component, but also exhibit high mechanical strength even after heating and firing by increasing the mixability between the components.

In one embodiment, the binder comprising the food additive is natural cellulose, high cell, carbomer, carbopol pregel, olive oil wax, polyquater, glucamate, methylcellulose, carboxyl methylcellulose, carr Voxy vinyl polymer, acacia collagen, CMC (carboxymethyl cellulose), aloe vera gel, carbopol pregel, kitripide, silicate, shellac, rubber, resinomide, PVC, PVA, PTFE, tamarind gum, fluoro Magnesium fluorosilicate, sodium polyacrylate, propylene glycol alginate, carboxymethyl cellulose sodium, carboxymethyl cellulose calcium, sodium alginate, casein, sodium caseinate, glucomanic acid, maltodextrin, gluten, propylene glycol alginate, carboxylate Potassium methylcellulose, natural starch, Food Starch Modified, ammonium alginate, glucosamine, guar gum, pectin, carrageenan, gum arabic, locust bean gum, acid clay, cellulase, spirulina pigment, cyclodextrin, amylase, steviol glycoside , trisulfide pigment, dextrin, carnauba wax, fructooligosaccharide, locust bean gum, mannose, galactox, tapioca starch, HPC (Hydroxyrpopyl cellulose), HPC-L, progelatinized starch starch), xanthan gum, povidone, HPMC (Hydroxypropyl methyl cellulose), PVP (Poly vinyl pyrrolidone), silicic acid soda, decistorin gum arabic, formaldehyde, vitrified , silicate, shellac, rubber, resinoid, bakelite, rubber, silicate shellac magnesite, agar powder, rosin (resin), starch powder, and may contain one or more selected from the group consisting of combinations thereof there is. Specifically, the binder may include fructooligosaccharide and xanthan gum in a weight ratio of 1:1.

In one embodiment, the binder may be included in an amount of about 0.1 to about 10% by weight based on the total weight of the mixture. If the binder is included in an amount of less than about 0.1% by weight, the mechanical strength of the prepared composition may decrease, and if it exceeds about 10% by weight, the viscosity of the mixture may excessively increase and workability may be reduced.

In one embodiment, the mixture may further include a lotus root extract. For example, the lotus root extract may be added together to form a mixture by mixing and stirring the shell powder with purified water, mineral powder, and a binder. The lotus root extract is a natural adhesive component, and may function as a binder to improve the compatibility of the shell powder with other components.

In one embodiment, the lotus root extract is after peeling and pulverizing the lotus root, adding water corresponding to about 5 times the total weight of the lotus root, and heating at about 80 ° C. to about 100 ° C. for about 6 hours or more, It may be prepared by extracting the liquid component and filtering, and then concentrating the filtered liquid component at about 55°C to about 60°C.

In one embodiment, the lotus root extract may be included in an amount of about 0.1 to about 5% by weight relative to the total amount of the mixture. If the lotus root extract is included in an amount of less than about 0.1% by weight, the mechanical strength of the prepared composition may decrease, and if it exceeds about 5% by weight, the viscosity of the mixture may excessively increase and workability may be reduced.

In one embodiment, the mixture may further include monofilament yarn. For example, the monofilament yarn may be added together when mixing and stirring the shell powder with purified water, mineral powder, and a binder to form a mixture. For example, the monofilament yarn may be a nylon monofilament yarn, and preferably may include a nylon 66 monofilament yarn.

In one embodiment, the nylon monofilament yarn may have a fineness of about 0.1 to about 1 denier, and may be cut to a length of about 0.5 cm to about 2 cm. For example, as the composition includes nylon 66 monofilament yarns cut to a fineness of about 0.1 to about 1 denier and a length of 0.5 to 2 cm, high mechanical strength and elasticity may be exhibited.

In one embodiment, the nylon monofilament yarn may be included in an amount of about 0.1 to about 3 wt% based on the total amount of the mixture. If the nylon monofilament yarn is included in an amount of less than about 0.1 wt%, the effect of improving mechanical strength and elasticity may not be sufficiently exhibited, and if it exceeds about 3 wt%, mixability with other components is inhibited and workability may decrease. can

In one embodiment, the mixture may further include sodium silicate. For example, the sodium silicate may be added together to form a mixture by mixing and stirring the shell powder with purified water, mineral powder, and a binder. The sodium silicate is one of silicates, and may be obtained by fusing sodium carbonate and quartz powder. The sodium silicate exhibits non-combustibility, and when included in the composition, prevents reburn of fire, enhances fire extinguishing performance, and reduces corrosion to metal.

In one embodiment, the sodium silicate may be included in an amount of about 0.1 to about 3 wt% based on the total weight of the mixture. If the sodium silicate is included in an amount of less than about 0.1% by weight, the combustion prevention effect may not be sufficiently exhibited, and if it exceeds about 3% by weight, miscibility with other components may be inhibited.

In one embodiment, the mixture further includes a natural pest repellent, so that it is possible to achieve a simple and safe insect repellent effect when stored for a long time in an external environment. For example, the natural pest repellent may be added together when mixing and stirring the shell powder with purified water, mineral powder, and a binder to form a mixture.

For example, the natural pest repellent may be at least one ethanol extract selected from lemon eucalyptus, citronella, dilemon, geraniol, citral, nerol, and eucalyptus, preferably an ethanol extract of lemon eucalyptus. can

Lemon eucalyptus is an evergreen shrub and is native to Australia. According to the Centers for Disease Control and Prevention, lemon eucalyptus oil is the only alternative to DEET, an insect repellent. When the composition according to the present invention is prepared, an eco-friendly natural pest repellent such as an ethanol extract of lemon eucalyptus is additionally included, so that the prepared composition can achieve a simple and safe insect repellent effect even when stored for a long time in an external environment.

In one embodiment, the natural pest repellent may be included in an amount of about 0.01 to about 3% by weight relative to the total of the mixture. If the natural pest repellent is included in less than about 0.01% by weight, it is difficult to achieve the desired insect repellent effect, and when it exceeds about 3% by weight, miscibility with other components may be inhibited.

In one embodiment, the mixing and stirring may be performed for about 10 minutes to about 60 minutes at a speed of about 1,500 to about 2,500 rpm. If the mixing and stirring is performed at a speed of less than about 1,500 rpm or for a time of less than about 10 minutes, each component may not be sufficiently mixed and agglomeration may occur, and a speed exceeding about 2,500 rpm or about 60 minutes If it is carried out for a time exceeding the above, heat due to mixing and stirring may be excessively generated and the components may be denatured.

In one embodiment, the composition including the shell may be utilized for interior materials. For example, the composition including the shell may be used as an interior material by molding it into a predetermined shape, drying it, and then heating and firing.

Specifically, the mixture containing the shell is injected into a mold to be molded into a predetermined shape, and the molded mixture is dried at a temperature of about 20° C. to about 60° C. for about 6 hours to about 72 hours, and then about 700 It can be used as an interior material by heating and calcining in a temperature range of ℃ to about 1,500 ℃.

In one embodiment, the composition prepared by the above-described method may be supplied through packaging and inspection, and in order to impart a unique color to the composition during the supply, the step of applying a pigment composition, etc. may be additionally included. However, it is not limited thereto.

Hereinafter, the configuration of the present invention and its effects will be described in more detail through specific examples and comparative examples. However, these examples are for explaining the present invention in more detail, and the scope of the present invention is not limited to these examples.

[Example 1]

First, the shells were prepared and washed three or more times, and then dried using hot air. The dried shells were pulverized to have a size of 150 mesh using a ball mill including steel balls having a diameter of 10 nm. The pulverized shell powder was mixed and stirred together with each component in a mixer at a speed of 2,000 rpm for about 60 minutes, as shown in Table 1 below, to obtain a paste-like mixture. The obtained mixture was named the composition of Example 1.

[Example 2 and Example 3]

Prepared in the same manner as in Example 1, except that the shell is immersed in an aqueous solution containing 80% by weight of purified water, 15% by weight of organic acid (citric acid), and 5% by weight of garlic powder for about 25 days to proceed with pretreatment did According to the components in Table 1 below, each of the prepared paste mixtures was named compositions of Examples 2 and 3, respectively.

[Comparative example]

It was prepared in the same manner as in Example 1, but a composition was prepared using the components shown in Table 1 below, and this was named as a comparative example.

Mixture components (wt%) Example 1 Example 2 Example 3 comparative example Purified water 40.00 38.00 37.50 60.00 shell powder 25.00 25.00 25.00 20.00 gypsum powder 25.00 25.00 23.50 20.00 binder 10.00 7.50 7.50 - lotus root extract - 2.50 2.50 - nylon 66 monofilament yarn - 2.00 2.25 - sodium silicate - - 1.25 - Lemon Eucalyptus Ethanol Extract - - 0.50 - Sum 100.00 100.00 100.00 100.00

[Experimental Example 1: Measurement of mechanical properties]

The mechanical properties of the compositions prepared in Examples 1 to 3 and Comparative Examples were measured. As for the measurement method, each composition prepared in Examples and Comparative Examples was put into a mold and molded, and then dried at room temperature at 25° C. for 48 hours. Next, the dried composition was heat-fired in a temperature range of 900° C. to obtain a composition for interior materials, and the flexural strength, compressive strength, tensile strength, and adhesion strength for each composition target surface were measured in KS F 4042-02 standard. measured accordingly. The measurement results are shown in Table 2 below.

division flexural strength
(N/mm ² ) compressive strength
(N/mm ² ) tensile strength
(N/mm ² ) adhesion strength
(MPa) Example 1 18.6 48.0 11.4 2.7 Example 2 21.3 52.9 13.7 3.0 Example 3 24.6 61.4 16.2 3.6 comparative example 10.2 28.6 9.0 2.1

As shown in Table 2, the composition prepared by the method according to the present invention exhibited significantly improved values in terms of flexural strength, compressive strength, tensile strength, and adhesion strength performance compared to Comparative Examples.

[Experimental Example 2: Measurement of elastic modulus]

The elastic modulus of the compositions prepared in Examples 1 to 3 and Comparative Examples were measured. As for the measurement method, each composition prepared in Examples and Comparative Examples was put into a mold and molded, and then dried at room temperature at 25° C. for 48 hours. Next, a composition for interior materials was obtained by heating and calcining the dried composition in a temperature range of 900° C., and the elastic modulus for each composition target surface was measured and shown in Table 3 below.

Item Example 1 Example 2 Example 3 comparative example Modulus of elasticity (MPa) 1.97×10 ⁵ 2.03×10 ⁵ 2.63×10 ⁵ 1.01×10 ⁵

As shown in Table 3, in the case of the composition prepared by the method according to the present invention, it could be confirmed that showed a higher modulus of elasticity compared to the comparative example.

[Experimental Example 3: Measurement of water resistance and chemical resistance]

The water resistance and chemical resistance of the compositions prepared in Examples 1 to 3 and Comparative Examples were measured, respectively. As for the measurement method, each composition prepared in Examples and Comparative Examples was put into a mold and molded, and then dried at room temperature at 25° C. for 48 hours. Next, the dried composition was heat-fired in a temperature range of 900° C. to obtain a composition for interior materials.

For each composition for interior materials, first, in the case of water resistance, a cylindrical water tank was installed on the composition target surface to check whether moisture permeated every month for 6 months, and in the case of chemical resistance, each composition target surface The brine having a salinity of 35‰ was treated for 1 hour every day, and it was checked whether the surface layer of the composition was damaged for 60 days in units of 1 day. The measurement results are shown in Table 4 below.

division Water resistance measurement result (months) Salt water chemical resistance
Measurement result (days) Example 1 1.5 31 Example 2 3 40 Example 3 - - comparative example One 7

As shown in Table 4, in the case of the composition prepared by the method according to the present invention, it was confirmed that, unlike the comparative example, high water resistance and chemical resistance were exhibited.

In this specification, only a few examples among the various embodiments performed by the present inventors are described, but the technical spirit of the present invention is not limited or limited thereto, and it is of course that it may be modified and variously implemented by those skilled in the art.

Claims (3)

Pre-treating by immersing the shells in an aqueous solution containing 80% by weight of purified water, 15% by weight of citric acid, and 5% by weight of garlic powder for 1 to 30 days by preparing the shell;
washing and drying the pretreated shells;
pulverizing the washed and dried shells to prepare shell powder; and
10 to 60% by weight of the shell powder, 10 to 50% by weight of purified water, 10 to 40% by weight of gypsum powder, 0.1 to 10% by weight of binder, 0.1 to 5% by weight of lotus root extract, and 0.1 to 3% by weight of nylon 66 monofilament yarn mixing and stirring to form a paste-type mixture;
including,
The nylon 66 monofilament yarn is characterized in that the nylon 66 monofilament yarn having a fineness of 0.1 to 1 denier is cut to a length of 0.5 to 2 cm,
A method for preparing a composition comprising shell powder. delete delete

Images