WO2019234207A1

WO2019234207A1 - Lyophobic film and preparation method and application thereof

Info

Publication number: WO2019234207A1
Application number: PCT/EP2019/064904
Authority: WO
Inventors: Weifu DONG; Yun Liu; Ting Li
Original assignee: Sig Technology Ag
Priority date: 2018-06-08
Filing date: 2019-06-06
Publication date: 2019-12-12
Also published as: CN110577687A

Abstract

The invention relates to a lyophobic film material and a preparation method thereof. The composition of the lyophobic film includes: 100 parts of matrix resin, and 10 to 100 parts of water-soluble resin. The preparation method includes: melt-blending the matrix resin and the water-soluble resin, melt processing the blend into a film, and placing it in deionized water to dissolve and etch the water-soluble resin to obtain the lyophobic film material. The lyophobic film material has good non-infiltrating effect forvarious droplets such as water, milk, yogurt, coffee, blood, urine, soy sauce, vinegar or tea, thus has good application prospects in yogurt covers, plastic containers, encapsulating materials, waterproof suits, working clothes, tablecloths, and aprons.

Description

LYOPHOBIC FILM AND PREPARATION METHOD AND APPLICATION

THEREOF

Technical Field

The present invention relates to the field of film materials, and further relates to a lyophobic film and a preparation method and application thereof.

Background Art

A superhydrophobic surface refers to a surface having a contact angle with water of more than 150° and a rolling angle of less than 10°. Superhydrophobic surface has been produced in the long-term evolution of natural organisms. Many plants and animals (such as lotus leaves, rice leaves, cicada's wings and water skipper's legs) surfaces have superhydrophobic and self-cleaning effects, the most typical representative of which is the so-called "lotus effect". The lotus effect is mainly due to a special micro-nano composite structure existing on the surface of the lotus leaf. At the same time, there is waxy substance with a low surface energy on the mastoid of the micro-nano structure ft is precisely because of the existence of this composite structure that it exhibits excellent superhydrophobicity. Through the study of superhydrophobic phenomenon in nature, it is discovered that superhydrophobicity is mainly related to two aspects of properties: surface roughness and surface energy of a material. Therefore, the superhydrophobic surface can generally be prepared by two methods: one is to construct a rough structure on the surface of a low surface energy material; and the other is to modify a low surface energy substance on a rough surface. Wherein, the surface rough structure has a more obvious influence on it.

At present, the field of the research on superhydrophobicity mainly focuses on the study of water infiltration. However, there are many liquids in our life that are closely related to us, such as milk, yogurt, coffee, blood, urine, soy sauce, vinegar or tea, etc. If the surface of the film material can achieve a good non-infiltrating effect for the above liquid at the same time, that is, a lyophobic film material, it will certainly expand the application field of the material, such as a yogurt cover, a plastic container, an encapsulating material, a waterproof suit, a working clothes, a tablecloth, and an apron, etc.

Polyethylene is a non-toxic, tasteless, and odorless general-purpose plastic with excellent properties, good elongation, electrical insulation, chemical stability, processability and low temperature resistance (which can be resistant to -70°C). As one of the five major synthetic resins, it is the most productive and imported product of synthetic resin in China. It is widely used in film products such as agricultural film, packaging film, blown film for liquid packaging; medical appliances, pharmaceutical and food packaging materials, pipes, injection molded products, wire wrapping layers, and the like. Therefore, if the polyethylene film can be imparted with more superior hydrophobic and lyophobic properties, its application field will be greatly expanded.

In addition, polyethylene is a typical low surface energy polymer, which itself has certain lyophobic property, but still does not meet the current needs of use. Therefore, it needs to be modified, but since polyethylene is a relatively inert material and has no reactive reactive groups in its molecular structure, the construction of a rough micro-nano structure on the surface of polyethylene has become the key to making it lyophobic. At present, there are many methods for preparing lyophobic polyethylene films, such as microphase separation, solvent-nonsolvent method, plasma etching, vapor deposition, etc. For example, Xiaoying Lu et al. prepared a superhydrophobic polyethylene film by solvent-nonsolvent method (Macromolecular Rapid Communications, 2010, 25(18): 1606-1610), which mainly controlled the crystallization behavior of LDPE by adjusting the crystallization time and nucleation rate to form a porous micro-nano structure, and the obtained polyethylene hydrophobic material has good hydrophobic property; Wang Jiayu, Li Yupeng et al. obtained a superhydrophobic surface by etching the surface of polyethylene with oxygen plasma to increase its roughness, and then depositing a plasma fluorocarbon polymer film on its surface (Water droplet impacting on superhydrophobic polyethylene surfaces by plasma nanotexturing [D], Dalian University of Technology, 2015); Yuan Zhiqing et al. prepared a nanostructure superhydrophobic surface by depositing a candle soot coating on the surface of a low density polyethylene (LDPE) substrate (Packaging Journal, 2017, 9(2): 25-29); and Chinese patent publication CN101157768 discloses dissolving high density polyethylene in xylene as a solvent, and adding non-solvent ethanol to the solution to prepare a superhydrophobic high density polyethylene film. However, in the practical application process, these methods are complicated in preparation process, high in cost, and difficult to realize industrialization. Therefore, a simple, safe, environmentally friendly, and large-scale industrial production preparation method is urgently needed for the development and application of lyophobic materials. Summary of the Invention

In order to solve the above problems, the present invention proposes a lyophobic film and a preparation method and application thereof.

A first object of the present invention is to provide a lyophobic film having a porous network structure on the surface thereof, a contact angle of the film with water of 120 to 150°, and a contact angle with yogurt of 110 to 140°;

the lyophobic film is obtained by blending raw materials comprising the following components in parts by weight:

100 parts of matrix resin; and

10 to 100 parts, preferably 66 to 100 parts, of water-soluble resin.

Wherein, the matrix resin is preferably at least one of polyethylene, polypropylene, polylactic acid, polyvinyl chloride, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS), polystyrene, polycarbonate, polyamide, polyester, ethylene-vinyl acetate copolymer, polyphenyl ether, phenolic resin, melamine resin, and unsaturated polyester, and more preferably polyethylene.

The water-soluble resin is preferably at least one of ethylene-acrylate copolymer, polyoxyethylene, polyacrylate, salts of polymethylacrylic acid, poly N-vinyl pyrrolidone, polyvinyl alcohol, polyacrylamide, polyacrylic acid, polyethylene glycol, polymaleic anhydride, Arabic gum, soybean glue, bone glue, gelatin, xanthan gum, carboxymethyl starch, and carboxymethyl cellulose, and more preferably ethylene-acrylate copolymer.

The lyophobic film of the present invention may be further added with various additives commonly used in the field such as stabilizers, lubricants, antioxidants, etc., according to processing requirements, and the amounts thereof are all conventionally used, or adjusted according to actual requirements.

The stabilizer may include bisphosphites, phosphate derivatives, calcium-zinc stabilizers, basic lead salts, metal soaps, organotins, organic stabilizers, composite stabilizers, and the like.

The lubricant may include paraffin wax, PE wax, stearates, silicone, ethylene bis stearamide, fatty acid amides, stearic acid, and the like.

The antioxidant may include antioxidant 264, antioxidant 2246, antioxidant 1010, thioesters, phosphites, and the like.

A second object of the present invention is to provide a preparation method of a lyophobic film comprising the steps of:

(1) drying a matrix resin and a water-soluble resin, and then melt-blending to obtain a blend;

(2) melt processing the blend into a film; and (3) placing the film in water to remove the water-soluble resin by etching, and vacuum drying to obtain the lyophobic film.

Preferably,

the melting process described in the step (1) selects a process commonly used in the art, preferably at least one of torque rheometer blending, single screw extrusion, twin screw extrusion, open mill mixing, and internal mixer mixing.

In the step (1), the drying temperature is 60 to 100°C, and the processing temperature is 140 to 300°C.

The melt processing process described in the step (2) is at least one of a film pressing method, a film casting method, a blown film method, a stretched film method, and a biaxially oriented film method.

In the step (2), the melt processing temperature is 140 to 300°C, and the film thickness is 0.005 to 0.5 mm.

In the step (3), the etching temperature is 25 to 100°C, the etching time is 2 to 24 hours; the vacuum drying temperature is 60 to 80°C, and the drying time is 2 to 30 hours.

A third object of the present invention is to apply a lyophobic film to a material or product for preventing liquid infiltration or penetration, the liquid is at least one of water, milk, yogurt, coffee, blood, urine, soy sauce, vinegar or tea, and the product is at least one of a yogurt cover, a plastic container, a encapsulating material, a waterproof suit, a working clothes, a tablecloth, and an apron.

Generally, polyethylene film materials used in daily life are generally produced by two processes, blow molding and casting. The film prepared by the two methods has a smooth surface and has only the limited hydrophobic and lyophobic capacities of polyethylene itself, so changing the roughness of the polyethylene surface is the key to improving its lyophobic property. A preferred ethylene-acrylate copolymer is an ionic polymer which has good compatibility with polyethylene and can be dissolved in water at 100°C. The two polymers are melt blended to form a blend, and then the ethylene-acrylate copolymer is etched in hot water to form a rough networke porous structure on the surface of polyethylene.

The polyethylene film prepared by the present invention has lyophobic property and can be used in a material for preventing infiltration or penetration of liquids such as water, milk, yogurt, coffee, blood, urine, soy sauce, vinegar or tea, etc.

The present invention has the following beneficial effects:

1. the lyophobic film prepared by the melt processing method provided by the present invention has simple operation process, is green and environmentally friendly, does not require any expensive equipment, and is suitable for large-scale industrial application; 2. the raw materials and reagents used in the present invention all comply with the requirements of environmental protection and have no pollution to the environment.

Brief Description of the Drawings

FIG. 1 is a photograph of a static water contact angle of the untreated polyethylene surface in Comparative Example 1.

FIG. 2 is a photograph of a static yogurt contact angle of the untreated polyethylene surface in Comparative Example 1.

FIG. 3 is a scanning electron micrograph of the untreated polyethylene surface in Comparative Example 1.

FIG. 4 is a photograph of a static water contact angle of the lyophobic polyethylene surface prepared in Example 1.

FIG. 5 is a photograph of a static yogurt contact angle of the lyophobic polyethylene surface prepared in Example 1.

FIG. 6 is a scanning electron micrograph of the lyophobic polyethylene surface prepared in Example 1.

FIG. 7 is a photograph of a static water contact angle of the lyophobic polyethylene surface prepared in Example 3.

FIG. 8 is a photograph of a static yogurt contact angle of the lyophobic polyethylene surface prepared in Example 3.

FIG. 9 is a scanning electron micrograph of the lyophobic polyethylene surface prepared in Example 3.

Detailed Description of the Invention

The present invention will be further described in conjunction with specific examples. It is to be understood that these examples are merely illustrative of the present invention and are not intended to limit the scope of application of the present invention. The method is a conventional method unless otherwise specified, and the raw materials used can be obtained from commercially available routes unless otherwise specified.

Comparative Example 1

50 g of polyethylene (Sinopec Shanghai Petrochemical Company Limited@Q281) was weighed and dried in a vacuum oven, and then melt processed, and the obtained polyethylene material was further prepared into a film of 0.5 mm by a calender at 170°C. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

The untreated polyethylene film had a water contact angle of 94.6° (as shown in FIG. 1) and a yogurt contact angle of 83.9° (as shown in FIG. 2). The scanning electron microscope on the film surface is shown in FIG. 3. It can be seen that the untreated film has a smooth surface and a small contact angle.

Example 1

Firstly, 25 g of polyethylene (Sinopec Shanghai Petrochemical Company Limited@Q281) and 25 g of ethylene-acrylate copolymer (Surlyn® 1601-2) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polyethylene and ethylene-acrylate copolymer (Surlyn® 1601-2) were then melt blended at a melt processing temperature of 170°C, then the obtained blend was prepared into a film of 0.5 mm by a calender at 170°C and then the film was etched in deionized water at 100°C for 4 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polyethylene film. The lyophobic polyethylene film had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

The film prepared in this example had a water contact angle of 140.4° (as shown in FIG. 4) and a yogurt contact angle of 138.8° (as shown in FIG. 5). It can be seen from the scanning electron microscope (FIG. 6), the surface of the treated film had a micron-sized porous network structure with obviously increased roughness, thus the lyophobic performance was greatly improved.

Example 2

Firstly, 25 g of polyethylene (Sinopec Shanghai Petrochemical Company Limited@Q281) and 25 g of ethylene-acrylate copolymer (Surlyn® 1605) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polyethylene and ethylene-acrylate copolymer (Surlyn® 1605) were then melt blended at a melt processing temperature of 170°C, then the obtained blend was prepared into a film of 0.5 mm by a calender at 170°C, and then the film was etched in deionized water at 100°C for 24 h, taken out and dried in a vacuum oven at 60°C for 2 h. The resulting film was a porous network lyophobic polyethylene film. The lyophobic polyethylene film had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Example 3

Firstly, 30 g of polyethylene (Sinopec Shanghai Petrochemical Company Limited@Q281) and 20 g of ethylene-acrylate copolymer (Surlyn® 1652) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polyethylene and ethylene-acrylate copolymer (Surlyn® 1652) were then melt blended at a melt processing temperature of 170°C, then the obtained blend was prepared into a film of 0.5 mm by a calender at 170°C, and then the film was etched in deionized water at 100°C for 4 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polyethylene film. The lyophobic polyethylene film had a porous network structure on its surface. The wettability of the fdm surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

The film prepared in this example had a water contact angle of 145.7° (as shown in FIG. 7) and a yogurt contact angle of 139.7° (as shown in FIG. 8). ft can be seen from the scanning electron microscope (FIG. 9), the surface of the treated film had a micron-sized porous network structure with obviously increased roughness, thus the lyophobic performance was greatly improved.

Example 4

Firstly, 30 g of polyethylene (Sinopec Shanghai Petrochemical Company Limited@Q281) and 20 g of ethylene-acrylate copolymer (Surlyn® 8920) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polyethylene and ethylene-acrylate copolymer (Surlyn® 8920) were then melt blended at a melt processing temperature of 170°C, then the obtained blend was prepared into a film of 0.5 mm by a calender at 170°C, and then the film was etched in deionized water at 100°C for 24 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polyethylene film. The lyophobic polyethylene film had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Example 5

Firstly, 25 g of polyethylene (Sinopec Shanghai Petrochemical Company Limited@Q281) and 25 g of ethylene-acrylate copolymer (Surlyn® 1702) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polyethylene and ethylene-acrylate copolymer (Surlyn® 1702) were then melt blended at a melt processing temperature of 170°C, then the obtained blend was prepared into a film of 0.1 mm by a calender at 170°C, and then the film was etched in deionized water at 100°C for 4 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polyethylene film. The lyophobic polyethylene film had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Example 6

Firstly, 25 g of polyethylene (Sinopec Shanghai Petrochemical Company Limited@Q281) and 25 g of ethylene-acrylate copolymer (Surlyn® PC-2000) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polyethylene and ethylene-acrylate copolymer (Surlyn® PC-2000) were then melt blended at a melt processing temperature of 170°C, then the obtained blend was prepared into a film of 0.005 mm by a calender at 170°C, and then the film was etched in deionized water at 100°C for 24 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polyethylene film. The lyophobic polyethylene film had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Example 7

Firstly, 25 g of polypropylene (Sinopec Shanghai Petrochemical Company Limited@M800E) and 25 g of ethylene-acrylate copolymer (Surlyn® 1601-2) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polypropylene and ethylene-acrylate copolymer (Surlyn® 1601-2) were then melt blended at a melt processing temperature of 180°C, then the obtained blend was prepared into a film of 0.005 mm by a calender at 180°C, and then the film was etched in deionized water at 100°C for 24 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polypropylene film. The lyophobic polypropylene fdm had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Example 8

Firstly, 30 g of polypropylene (Sinopec Shanghai Petrochemical Company Limited@M800E) and 20 g of polyoxyethylene (Dow Chemical Company@PE0-90M) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polypropylene and polyoxyethylene were then melt blended at a melt processing temperature of 180°C, then the obtained blend was prepared into a film of 0.5 mm by a calender at 180°C, and then the film was etched in deionized water at 25°C for 24 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting fdm was a porous network lyophobic polypropylene fdm. The lyophobic polypropylene film had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Example 9

Firstly, 25 g of polylactic acid (NatureWorks@4032D) and 25 g of ethylene-acrylate copolymer (Surlyn® PC-2000) were weighed and placed in a vacuum oven, and dried at 60°C, the dried polylactic acid and the ethylene-acrylate copolymer (Surlyn® PC-2000) were then melt blended at a melt processing temperature of 170°C, then the obtained blend was prepared into a film of 0.5 mm by a calender at 170°C, and then the film was etched in deionized water at 100°C for 24 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polylactic acid film. The lyophobic polylactic acid film had a porous network structure on its surface. The wettability of the fdm surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Example 10

Firstly, 30 g of polystyrene (Shanghai SECCO Petrochemical Company Limited @123p) and 20 g of polyoxyethylene (Dow Chemical Company@PE0-90M) were weighed and placed in a vacuum oven, and dried at 60°C, the dried polystyrene and polyoxyethylene were then melt blended at a melt processing temperature of 200°C, then the obtained blend was prepared into a film of 0.5 mm by a calender at 200°C, and then the film was etched in deionized water at 25°C for 24 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polystyrene fdm. The lyophobic polystyrene fdm had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Example 11

Firstly, 45 g of polyethylene (Sinopec Shanghai Petrochemical Company Limited@Q281) and 5 g of ethylene-acrylate copolymer (Surlyn® 1605) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polyethylene and ethylene-acrylate copolymer (Surlyn® 1605) were then melt blended at a melt processing temperature of 170°C, then the obtained blend was prepared into a film of 0.5 mm by a calender at 170°C, and then the film was etched in deionized water at 100°C for 24 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polyethylene film. The lyophobic polyethylene film had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Example 12

Firstly, 40 g of polyethylene (Sinopec Shanghai Petrochemical Company Limited@Q281) and 10 g of ethylene-acrylate copolymer (Surlyn® 1605) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polyethylene and ethylene-acrylate copolymer (Surlyn® 1605) were then melt blended at a melt processing temperature of 170°C, then the obtained blend was prepared into a film of 0.5 mm by a calender at 170°C, and then the film was etched in deionized water at 100°C for 24 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polyethylene film. The lyophobic polyethylene film had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Example 13

Firstly, 35 g of polyethylene (Sinopec Shanghai Petrochemical Company Limited@Q281) and 15 g of ethylene-acrylate copolymer (Surlyn® PC-2000) were weighed and placed in a vacuum oven, and dried at 80°C, the dried polyethylene and ethylene-acrylate copolymer (Surlyn® PC-2000) were then melt blended at a melt processing temperature of 170°C, then the obtained blend was prepared into a film of 0.5 mm by a calender at 170°C, and then the film was etched in deionized water at 100°C for 24 h, taken out and dried under an environment of 60°C in a vacuum oven for 2 h. The resulting film was a porous network lyophobic polyethylene film. The lyophobic polyethylene film had a porous network structure on its surface. The wettability of the film surface was tested by an OCA 20 contact angle tester, and the static water contact angle and yogurt contact angle were tested. The contact angle test results are shown in Table 1.

Table 1 Comparative Example and Examples, and Water Contact Angle and Yogurt Contact Angle

The preparation method of film provided by the present invention is simple, green and environmentally friendly, does not require any expensive equipment, and is suitable for large-scale industrial application.

It should be understood by those skilled in the art that the above description is only specific examples of the present invention, and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. A lyophobic film, characterized in that the lyophobic film is obtained by blending raw materials comprising the following components in parts by weight:

100 parts of matrix resin; and

10 to 100 parts of water-soluble resin;

wherein, the lyophobic film has a porous network structure on the surface thereof, and a contact angle between the film and water of 120 to 150°.

2. The lyophobic film according to claim 1, characterized in that the lyophobic film is obtained by blending raw materials comprising the following components in parts by weight:

100 parts of matrix resin; and

66 to 100 parts of water-soluble resin.

3. The lyophobic film according to claim 1, characterized in that:

the matrix resin is at least one of polyethylene, polypropylene, polylactic acid, polyvinyl chloride, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer, polystyrene, polycarbonate, polyamide, polyester, ethylene-vinyl acetate copolymer, polyphenyl ether, phenolic resin, melamine resin, and unsaturated polyester.

4. The lyophobic film according to claim 1, characterized in that:

the water-soluble resin is at least one of ethylene-acrylate copolymer, polyoxyethylene, polyacrylate, salts of polymethylacrylic acid, poly N-vinyl pyrrolidone, polyvinyl alcohol, polyacrylamide, polyacrylic acid, polyethylene glycol, polymaleic anhydride, Arabic gum, soybean glue, bone glue, gelatin, xanthan gum, carboxymethyl starch, and carboxymethyl cellulose.

5. The lyophobic film according to any one of claims 1 to 4, characterized by being prepared by a method comprising the steps of:

(1) drying the matrix resin and the water-soluble resin and then melt-blending to obtain a blend;

(2) melt processing the blend into a film; and

(3) placing the film in water to remove the water-soluble resin by etching, and vacuum drying to obtain the lyophobic film.

6. A preparation method of the lyophobic film according to any one of claims 1 to 5, characterized by comprising the steps of:

(2) melt processing the blend into a film; and

7. The preparation method of the lyophobic film according to claim 6, characterized in that:

in the step (1), the drying temperature is 60 to 100°C, and the melting temperature is 140 to

300°C.

8. The preparation method of the lyophobic film according to claim 6, characterized in that:

9. The preparation method of the lyophobic film according to claim 6, characterized in that:

10. Use of the lyophobic film according to any one of claims 1 to 5 in a material or product for preventing liquid infiltration or penetration, wherein the liquid is at least one of water, milk, yogurt, coffee, blood, urine, soy sauce, vinegar or tea, and the product is at least one of a yogurt cover, a plastic container, an encapsulating material, a waterproof suit, a working clothes, a tablecloth, and an apron.