LU500708B1 - Method for treating leaves with tio2 nano-film - Google Patents

Abstract

The present disclosure discloses a method for treating leaves with a TiO2 nano-film, including growing a foliage plant, collecting leaves, and treating the leaves by anti-drying, flat pressing and moisturizing, ironing and pressing for shaping, correcting the shape, stretching veins and coating the leaves. The method provided in the present disclosure is simple in treatment. The treated leaves allow easy mixing and dispersion of various pigments thereon, thereby effectively guaranteeing uniform painting with high degree of staining and high transparency, and can be preserved for a long time. The base material for painting is not prone to yellowing and dulling, is capable of effectively maintaining whiteness, tone and gloss, and has good chalking resistance. Moreover, the treated leaves are not prone to gnawing by insects, and suitable for placement at home with the function of purifying air.

Description

METHOD FOR TREATING LEAVES WITH TIO; NANO-FILM LU500708

TECHNICAL FIELD The present disclosure relates to the field of material processing, and in particular, to a method for treating leaves with a TiO2 nano-film.

BACKGROUND Leaf paintings are made with leaves as carriers. Unfortunately, because the leaves cannot be easily stained and have low transparency, existing leaf paintings usually have the disadvantages of difficult painting, difficult mixing and dispersion of various pigments on leaves, non-uniform painting, low degree of staining and low transparency. Moreover, for leaf paintings preserved for a long time, the base materials used for painting are prone to yellowing and dulling, cannot maintain whiteness, tone and gloss, and are poor in chalking resistance.

SUMMARY In view of the above problems, an embodiment of the present disclosure provides a method for treating leaves with a TiO, nano-film that allows for uniform painting, high degree of staining and high transparency and can maintain the whiteness, tone and gloss of leaf paintings. An embodiment of the present disclosure provides a method for treating leaves with a TiO2 nano-film, including the following steps: S1, growing a foliage plant for painting in a place near a mountain and by a river, which is sheltered from wind with less sunlight; S2, collecting thin, board, natural and complete leaves with a graceful color and rich texture; S3, covering the leaves with anti-drying paper for later use and controlling a moisture content of the leaves to a range of 60-80%; S4, performing continuous flat pressing on the leaves until the leaves are flat, subjecting the flat leaves to aeration drying until the moisture content is 20-30%, and keeping the moisture content in the range of 20-30% by using a humectant sodium carboxymethylcellulose or glycerol; S5, ironing and pressing the leaves for shaping, where the moisture content of the shaped leaves is 15-20%; and the ironing and pressing are conducted at 150°C to 170°C for 2 seconds under a pressure of 39.2 N/cm?; S6, correcting the shape according to a leaf shape needed by a leaf painting; S7, stretching protruding veins on the leaves; and 1

S8, coating the leaves with a TiOz nano-film, thereby obtaining leaves for LU500708 painting.

Further, in step S8, the TiO, nano-film may be obtained by the following steps: S8.1, grinding and grading TiO;, and treating coarse TiO, particles into fine TiO» particles having properties of a pigment; $8.2, performing surface treatment on the fine TiO; particles obtained in step S8.1; and S8.3, subjecting the surface-treated TiO: to ultra-fine pulverization by using an airflow pulverizer, thereby obtaining the TiO» nano-film for coating on leaves.

Further, in step S8.2, the surface treatment may include the following specific steps: treating the fine TiO: particles into an aqueous TiO suspension and adding an inorganic compound for coating the TiO»; and adding an inorganic treating agent to the TiO, coated with the inorganic compound.

Further, the inorganic compound may be an aluminum, silicon or titanium inorganic compound.

Further, the leaves may be Japanese banana leaves.

Compared with the prior art, the present disclosure has the following advantages: the method provided in the present disclosure is simple in treatment. The treated leaves allow easy mixing and dispersion of various pigments thereon, thereby effectively guaranteeing uniform painting with high degree of staining and high transparency, and can be preserved for a long time. The base material for painting is not prone to yellowing and dulling, is capable of effectively maintaining whiteness, tone and gloss, and has good chalking resistance. Moreover, the treated leaves are not prone to gnawing by insects, and suitable for placement at home with the function of purifying air.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart of a method for treating leaves with a TiO2 nano-film according to an embodiment of the present disclosure; and FIG. 2 is a flowchart of step S8 in FIG. 1.

DETAILED DESCRIPTION OF THE EMBODIMENTS To make the objective, technical solution and advantages of the present disclosure clearer, embodiments of the present disclosure will be further described in detail in conjunction with the accompanying drawings.

Referring to FIG. 1 and FIG. 2, an embodiment of the present disclosure provides a method for treating leaves with a TiO, nano-film, including the following 2 steps: LU500708 S1, grow a foliage plant for painting in a place near a mountain and by a river, which is sheltered from wind with less sunlight; S2, collect thin, board, natural and complete leaves with a graceful color and rich texture. Preferably, the leaves are Japanese banana leaves.

S3, cover the leaves with anti-drying paper for later use and control a moisture content of the leaves to a range of 60-80%; S4, perform continuous flat pressing on the leaves until the leaves are flat, subject the flat leaves to aeration drying until the moisture content is 20-30%, and keep the moisture content in the range of 20-30% by using a humectant sodium carboxymethylcellulose or glycerol; S5, iron and press the leaves for shaping, where the moisture content of the shaped leaves is 15-20%; and the ironing and pressing are conducted at 150°C to 170°C for 2 seconds under a pressure of 39.2 N/cm?; S6, correct the shape according to a leaf shape needed by a leaf painting; S7, stretch protruding veins on the leaves; and S8, coat the leaves with a TiO, nano-film. TiO is a wide-band n-type semiconductor, has excellent physical and chemical properties such as non-toxicity, high chemical properties and thermal stability, and light sensitivity, and is known as one of the most attractive inorganic materials. The TiO; nano-film is low in toxicity, good in thermal stability, low in price, and able to directly destroy cell walls, cell membranes or components in cells under the action of light. It has strong antiomicrobial activity and can be used as a good antibacterial material. It can prolong the mold-proof duration and reduce the generation of volatile organic compounds (VOCs). Anti-corrosion and mold-proof effects can be achieved.

Moreover, the TiO, nano-film also has the function of purifying air. Photocatalysis of SO» by TiO» under ultraviolet light is studied by using a quartz photocatalytic reactor, and the results show that the presence of O; plays a very important role in photocatalysis of SO» by the TiO, nano-film under ultraviolet light and demonstrate the mechanism that the primary product from the photocatalytic oxidation of SO- reacts with water to produce H>SO.. Furthermore, experimental results show that TiO, prepared at 750°C and the adsorption efficiency of TiO: is improved with increasing illumination time. It is also demonstrated that adsorption of formaldehyde on TiOz is chemical adsorption and the TiO, adsorbed with formaldehyde cannot be recycled after being heated. Therefore, it indicates that the TiO. nano-film has the functions of purifying air and resisting ultraviolet light.

The TiO. nano-film is obtained by the following steps: 3

S8.1, grind and grade TiO», and treat coarse TiO» particles into fine TiO- LU500708 particles having properties of a pigment; S8.2, perform surface treatment on the fine TiO. particles obtained in step S8.1. The surface treatment includes the following specific steps: treat the fine TiO.

particles into an aqueous TiO, suspension and add an inorganic compound for coating the TiO, to improve the weather fastness of TiO,, with the inorganic compound being preferably an aluminum, silicon or titanium inorganic compound; and add an inorganic treating agent to the TiO» coated with the inorganic compound to improve the wettability and dispersibility of the TiOa.

S8.3, subject the surface-treated TiO. to ultra-fine pulverization by using an airflow pulverizer, thereby obtaining the TiO» nano-film for coating on leaves. The leaves are coated with the TiO, nano-film, thereby obtaining the leaves for painting. The method provided in the present disclosure is simple in treatment. The treated leaves allow easy mixing and dispersion of various pigments thereon, thereby effectively guaranteeing uniform painting with high degree of staining and high transparency, and can be preserved for a long time. The base material for painting is not prone to yellowing and dulling, is capable of effectively maintaining whiteness, tone and gloss, and has good chalking resistance. Moreover, the treated leaves are not prone to gnawing by insects, and suitable for placement at home with the function of purifying air. The embodiments in the present disclosure and the features in the embodiments may be combined with one another without conflict. The foregoing are merely descriptions of preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure. 4

Claims (5)

CLAIMS LU500708

1. A method for treating leaves with a TiO. nano-film, comprising the following steps: S1: growing a foliage plant for painting in a place near a mountain and by a river, which is sheltered from wind with less sunlight; S2: collecting thin, board, natural and complete leaves with a graceful color and rich texture; S3: covering the leaves with anti-drying paper for later use and controlling a moisture content of the leaves to a range of 60-80%; S4: performing continuous flat pressing on the leaves until the leaves are flat, subjecting the flat leaves to aeration drying until the moisture content is 20- 30%, and keeping the moisture content in the range of 20-30% by using a humectant sodium carboxymethylcellulose or glycerol; S5: ironing and pressing the leaves for shaping, wherein the moisture content of the shaped leaves is 15-20%; and the ironing and pressing are conducted at 150°C to 170°C for 2 seconds under a pressure of 39.2 N/cm?; S6: correcting the shape according to a leaf shape needed by a leaf painting; S7: stretching protruding veins on the leaves; and S8: coating the leaves with a TiO, nano-film, thereby obtaining leaves for painting.

2. The method according to claim 1, wherein in step S8, the TiO; nano-film is obtained by the following steps: S8.1: grinding and grading TiOz, and treating coarse TiO: particles into fine TiO» particles having properties of a pigment; $8.2: performing surface treatment on the fine TiO: particles obtained in step S8.1; and S8.3: subjecting the surface-treated TiO. to ultra-fine pulverization by using an airflow pulverizer, thereby obtaining the nano-sized TiO. particles for coating on leaves.

3. The method according to claim 2, wherein in step S8.2, the surface treatment comprises the following specific steps: treating the fine TiO; particles into an aqueous TiO; suspension and adding an inorganic compound for coating the TiOz; and adding an inorganic treating agent to the TiO. coated with the 5 inorganic compound. LU500708

4. The method according to claim 3, wherein the inorganic compound is an aluminum, silicon or titanium inorganic compound.

5. The method according to claim 1, wherein the leaves are Japanese banana leaves. 6