Surface modification method of hose and application thereof

Abstract

The invention discloses a surface modification method of a hose, which comprises the following steps of: spraying fibers on the surface of the hose, and modifying the surface by using a modifying solution containing a modifier to form a modified layer, so that the mechanical strength, stain resistance and anti-blocking performance of the hose can be effectively improved.

Description

Technical Field

[0001] The invention relates to a surface modification method of a hose and application thereof. Background Art

[0002] Hoses are commonly used and important engineering materials in industrial water treatment (including industrial sewage drainage). Most of these products are soft pipes made of chemical fiber reinforced modified plastics. These hoses have many advantages such as a short construction period and the convenience of later changes to pipelines and positions.

[0003] Taking the application of aeration hoses commonly used in industrial water treatment as an example, they are generally installed at the bottom of the aeration tank. The aeration hoses swell during aeration during operation, and are naturally flattened by the hydrostatic pressure when not aerated, thus avoiding sludge backflow and blockage to a certain extent.

[0004] However, compared with conventional hard pipes, the hose is limited by its own material and will face the challenge of durability in long-term use, and the hose body itself will inevitably produce pollution. For example, when placed in the aeration tank of the activated sludge process, the aeration hose will be repeatedly used and flattened, and it is generally not taken out during the shutdown. Therefore, in the long-term use process, the aeration hose is affected by the action of microorganisms and the scouring and infiltration of water, and the fine sludge will penetrate into the material skeleton, causing unflushed blockage. For example, in the oily water body in the chemical industry, the aeration hose is easily blocked by sludge or adhesive substances, affecting the aeration effect. Summary of the invention

[0005] 1. Problem to be solved

[0006] Based on the problems of pollution and clogging in the use of hoses in industrial water treatment, the present invention provides a surface modification method for hoses, which improves their application effect (durability, anti-fouling and anti-clogging performance) in the application process of industrial water treatment.

[0007] 2. Technical solution

[0008] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0009] According to the purpose of the present invention, the first aspect of the present invention provides a method for surface modification of a hose, comprising the following steps:

[0010] S1. Spray the fiber onto the surface of the hose;

[0011] S2. Modifying the surface treated by S1. using a modifying liquid;

[0012] S3. Drying the surface treated in S2.;

[0013] Wherein, the steps S2. to S3. can be repeated N times, where N is an integer ≥1; preferably, N is an integer of 2 to 5.

[0014] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, the modification liquid comprises component one, component two, and component three;

[0015] The first component is any one or two of polydimethylsiloxane and hexadecyltrimethoxysilane,

[0016] The second component is nano silicon dioxide.

[0017] The component three is any one or two or more of sodium carboxylated cellulose, sodium alginate and carboxylated chitosan.

[0018] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, the mass ratio of component one, component two and component three is (0.004-0.006): (35-45): (0.8-1.2);

[0019] The concentration of component three is 4-6 mg / L.

[0020] In the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S1., the diameter of the fiber can be any value taken from any of the following numerical ranges: 10-30 μm, 10-25 μm, 10-20 μm, 10-15 μm, 15-30 μm, 15-25 μm, 15-20 μm, 20-30 μm, 20-25 μm.

[0021] Preferably, the fiber has a diameter of 15 to 25 microns.

[0022] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S1., the fiber includes any one or two or more of polypropylene fiber, polyurethane fiber, polylactic acid fiber, and polyamide fiber;

[0023] Preferably the fibres comprise polypropylene fibres.

[0024] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, the S1. comprises:

[0025] S1.1. heating the surface;

[0026] S1.2. Spray the fiber onto the surface of the hose;

[0027] S1.3. Apply pressure to the surface treated in S1.2. to perform pressure treatment.

[0028] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S1.1., the heating temperature can be any value taken from any of the following numerical ranges: 45-70°C, 45-65°C, 45-60°C, 45-55°C, 45-50°C, 45-70°C, 50-65°C, 50-60°C, 50-55°C, 55-70°C, 55-65°C, 55-60°C, 60-70°C, 60-65°C; preferably, the heating temperature is 50-55°C;

[0029] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S1.2., the spraying amount of the fiber can be any value taken from any of the following numerical ranges: 10 to 55 g / m 2 10~50g / m 2 10~45g / m 2 10~40g / m 2 10~35g / m 2 10~30g / m 2 10~25g / m 2 10~20g / m 2 10~15g / m 2 15~55g / m 2 15~50g / m 2 15~45g / m 2 15~40g / m 2 15~35g / m 2 15~30g / m 2 15~25g / m 2 15~20g / m 2 10~55g / m 2 20~55g / m 2 20~50g / m 2 20~45g / m 2 20~40g / m 2 20~35g / m 2 20~30g / m 2 20~25g / m 2 25~55g / m 2 25~50g / m 2 25~45g / m 2 25~40g / m 2 25~35g / m 2 25~30g / m 2 30~55g / m 2 , 30~50g / m2 30~45g / m 2 30~40g / m 2 30~35g / m 2 35~55g / m 2 , 35~50g / m 2 35~45g / m 2 , 35~40g / m 2 40~55g / m 2 40~50g / m 2 40~45g / m 2 45~55g / m 2 50~50g / m 2 45~55g / m 2 The fiber spraying amount is preferably 10-25g / m 2 .

[0030] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S1.2., the spraying thickness E of the fiber can be any value taken from any one of the following numerical ranges: 0.1-0.7mm, 0.1-0.5mm, 0.1-0.3mm, 0.2-0.7mm, 0.2-0.5mm, 0.2-0.3mm, 0.3-0.7mm, 0.3-0.5mm, 0.5-0.7mm; preferably, the spraying thickness E of the fiber is 0.2-0.5mm.

[0031] In the method for modifying the surface of a hose according to any embodiment of the first aspect of the present invention, in S1.2., when the fiber spraying is performed, the surface is in a stretched state.

[0032] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S1.3., during the pressurized treatment, the heating temperature of the surface can be any value taken from any of the following numerical ranges: 45-70°C, 45-65°C, 45-60°C, 45-55°C, 45-50°C, 45-70°C, 50-65°C, 50-60°C, 50-55°C, 55-70°C, 55-65°C, 55-60°C, 60-70°C, 60-65°C; the preferred temperature is 50-55°C;

[0033] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S1.3., during the pressurization treatment, the pressure can be any value within any of the following numerical ranges: 0.5-2Mpa, 0.5-1.5Mpa, 0.5-1Mpa, 1-2Mpa, 1-1.5Mpa, 1.5-2Mpa.

[0034] According to the surface modification method for a hose of any embodiment of the first aspect of the present invention, in S1.3., the pressurizing treatment is performed by rolling.

[0035] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S1.3., during the pressurization treatment, the pressurization thickness H1 is set to:

[0036] H1=H0+E-Δ(Formula 1)

[0037] in,

[0038] H0 hose wall thickness, specifically refers to the hose wall thickness before fiber deposition in S1.;

[0039] E is the deposited thickness of the fiber;

[0040] Δ is the adjustment amount, and its value ranges from 0.1 to 1 mm.

[0041] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S1.3., the time of the pressurization treatment can be any value within any of the following numerical ranges: 45-60s, 45-55s, 45-50s, 50-60s, 50-55s, 55-60s.

[0042] In the method for modifying the surface of a hose according to any one of the embodiments of the first aspect of the present invention, in S1.3., the surface is in a stretched state during the pressurization treatment.

[0043] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, the S2. comprises:

[0044] S2.1. contacting the modified liquid with the surface;

[0045] S2.2. Apply pressure to the surface to perform a pressure treatment.

[0046] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S2.1., during the contacting, the temperature of the modifying liquid can be maintained at any value within any of the following numerical ranges: 45-70°C, 45-65°C, 45-60°C, 45-55°C, 45-50°C, 45-70°C, 50-65°C, 50-60°C, 50-55°C, 55-70°C, 55-65°C, 55-60°C, 60-70°C, 60-65°C; preferably, the temperature of the modifying liquid is maintained at 50-55°C.

[0047] In the method for modifying the surface of a hose according to any embodiment of the first aspect of the present invention, in S2.1., the surface is in a stretched state when the contact is made.

[0048] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S2.2., during the pressurization treatment, the pressure can be any value within any of the following numerical ranges: 0.5-2Mpa, 0.5-1.5Mpa, 0.5-1Mpa, 1-2Mpa, 1-1.5Mpa, 1.5-2Mpa.

[0049] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S2.2., during the pressurization treatment, the pressurization thickness H3 is set to:

[0050] H3=H2-Δ (Formula 2)

[0051] in,

[0052] H2 is the wall thickness of the hose after the S1 treatment is completed;

[0053] Δ is the adjustment amount, and its value ranges from 0.1 to 1 mm.

[0054] The "S1. Wall thickness of the hose after treatment" mentioned here includes "wall thickness of the original hose" and "thickness of the fiber layer after deposition and pressurization treatment on the surface of the original hose"; in one case, H2 can be considered to be equal to H1 in S1.; another case that needs to be considered is that "S1. Wall thickness of the hose after treatment" may have undergone a slight change before performing step S2.2., and H2 at this time may be greater than H1 or less than H1. At this time, H2 is equal to the value obtained by the current measurement. The above two cases should be understood as the value range of H2 in the present invention.

[0055] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S2.2., during the pressurized treatment, the heating temperature of the surface can be any value within any of the following numerical ranges: 45-70°C, 45-65°C, 45-60°C, 45-55°C, 45-50°C, 45-70°C, 50-65°C, 50-60°C, 50-55°C, 55-70°C, 55-65°C, 55-60°C, 60-70°C, 60-65°C; the preferred temperature is 50-55°C.

[0056] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S2.2., the time of the pressurization treatment can be any value within any of the following numerical ranges: 45-60s, 45-55s, 45-50s, 50-60s, 50-55s, 55-60s.

[0057] In the method for surface modification of a hose according to any embodiment of the first aspect of the present invention, in S2.2., the pressurizing treatment is performed by rolling.

[0058] In the method for modifying the surface of a hose according to any one of the embodiments of the first aspect of the present invention, in S2.2., the surface is in a stretched state during the pressurization treatment.

[0059] According to the surface modification method of the hose of any embodiment of the first aspect of the present invention, in S3., the temperature of the drying treatment does not exceed 85°C;

[0060] Preferably, the drying temperature does not exceed 70°C;

[0061] More preferably, the drying temperature is 50-55°C.

[0062] According to the purpose of the present invention, in a first aspect, the present invention provides a surface-modified hose, wherein the surface of the hose has a protective layer, and the protective layer includes fibers and a modifier.

[0063] According to any embodiment of the hose of the first aspect of the present invention, the protective layer comprises a fiber layer covering the surface of the hose, and a modifier layer negatively covering the surface of the fiber layer.

[0064] According to the hose of any embodiment of the first aspect of the present invention, the modifier comprises component one, component two, and component three;

[0065] The first component is any one or two of polydimethylsiloxane and hexadecyltrimethoxysilane,

[0066] The second component is nano silicon dioxide.

[0067] The component three is any one or two or more of sodium carboxylated cellulose, sodium alginate, and carboxylated chitosan; preferably, the component three includes sodium carboxylated cellulose.

[0068] According to any embodiment of the first aspect of the present invention, the fiber comprises any one or two or more of polypropylene fiber, polyurethane fiber, polylactic acid fiber, and polyamide fiber;

[0069] Preferably the fibres comprise polypropylene fibres.

[0070] The third aspect of the present invention provides a hose obtained by the surface modification method provided in any embodiment of the first aspect of the present invention, and / or a surface-modified hose provided in any embodiment of the second aspect of the present invention, and the hose is used for industrial water treatment, such as as an aeration hose.

[0071] Beneficial Effects

[0072] (1) The hose provided by the present invention has a protective layer on its surface, and the protective layer includes fibers and a modifier, which can effectively improve the mechanical strength and anti-fouling and anti-clogging properties of the hose.

[0073] (2) The protective layer on the surface of the hose provided by the present invention specifically includes a fiber layer covering the surface of the hose and a modifier layer negatively covering the surface of the fiber layer.

[0074] The fiber layer covering the surface of the hose can, on the one hand, enhance the mechanical strength of the hose, and on the other hand, ensure the adhesion effect of the modifier and achieve effective fixation of the modifier;

[0075] The modifier layer covering the surface of the fiber layer can effectively play the protective role of the modifier on the hose.

[0076] (3) The surface modification method of the hose provided by the present invention first sprays the fiber onto the surface of the hose, and then uses a modifying liquid containing a modifier to modify the surface to form a modified layer, which can effectively improve the mechanical strength and anti-fouling and anti-blocking performance of the hose;

[0077] The deposition of fibers can, on the one hand, enhance the mechanical strength of the hose, and on the other hand, ensure the adhesion of the modifier and achieve effective fixation of the modifier.

[0078] The modifier can be effectively and stably fixed on the surface of the hose through the fiber, effectively playing a protective role of the modifier on the hose.

[0079] (4) The surface modification method of the hose provided by the present invention comprises spraying the fiber onto the surface of the hose and then subjecting the surface to pressure treatment, which can effectively exert the effect of the fiber on improving the mechanical strength of the hose and ensure the modification effect of the modifier;

[0080] However, the magnitude of the pressure treatment should be moderate;

[0081] If the pressure intensity of the pressurized treatment is too small, the fiber cannot effectively enhance the mechanical strength. The specific reasons are as follows:

[0082] (a) The fiber layer is easily damaged: After spraying, there are certain gaps between the fibers, and the fibers are not tightly connected to each other. The fibers need to be compacted to form a stable fiber layer. If the pressure strength is too low, the gaps between the fibers still exist, and the fibers inside the fiber layer are not firmly overlapped, so a stable fiber layer cannot be formed and the fiber layer is easily damaged.

[0083] (b) The fiber layer is easy to fall off: The connection between the fiber layer and the hose needs to be strengthened by pressure treatment. If the pressure strength is too small, the connection between the fibers and the hose is not firm, which will cause the fiber layer to be damaged and fall off.

[0084] (c) The fiber layer cannot play a role in improving the mechanical strength: When the connection between the fiber layer and the hose is not firm, the fiber layer cannot effectively share the stress and cannot play a role in enhancing the mechanical strength.

[0085] (d) The adhesion effect of the modifier cannot be guaranteed: the pressure is too small, resulting in a relatively loose fiber layer. The fiber layer serves as the base for the modifier coating, which will cause a large change in the amount of loaded modifier and the ratio of each component.

[0086] If the pressure intensity of the pressurized treatment is too high, the surface roughness of the treated fiber layer will be reduced, affecting the adhesion effect of the modifier and the stability of the modifier after adhesion. In addition, excessive pressure will reduce the specific surface area of ​​the fiber layer, resulting in a decrease in the amount of modifier attached to the fiber layer, affecting the anti-fouling and anti-blocking performance of the hose.

[0087] (5) The surface modification method of the hose provided by the present invention determines a suitable spraying amount to ensure that a "fiber layer" is formed on the surface as much as possible, and the "fiber layer" can effectively cover the surface of the hose;

[0088] If the spraying amount per unit area is too high, the thickness of the fiber layer will increase. If the fiber layer is too thick, the density between the fibers will change, affecting the strength of the fiber layer itself.

[0089] If the spraying amount per unit area is too low, a continuous and uniform fiber layer will not be formed on the hose surface, affecting the mechanical strength of the fiber layer; or the fiber layer will be too thin, resulting in a reduced amount of modifier attached to the fiber layer, affecting the hose's anti-fouling and anti-clogging performance.

[0090] (6) The surface modification method of the hose provided by the present invention requires that the surface of the treated hose be in a certain stretched state, preferably in a relatively stretched state (the stretching means that the surface area of ​​the hose is enlarged to a certain extent) before fiber precipitation is performed on the surface of the hose, so that the "fibers" can form a comprehensive and effective covering effect on the surface of the hose.

[0091] (7) The surface modification method of the hose provided by the present invention is to heat the surface of the hose at a certain temperature (45-70°C) before fiber precipitation on the surface of the hose. The purpose is to improve the flexibility and ductility of the hose based on the principle of "thermal expansion" and generate a small surface area; not only can the "fiber" form a comprehensive and effective covering effect on the surface of the hose; but also it is beneficial to the coating effect of the fiber on the surface of the hose.

[0092] (8) The surface modification method of the hose provided by the present invention, when using the modifying liquid for modification, needs to first heat the surface of the hose at a certain temperature (45-70°C), the purpose of which is to increase the surface area of ​​the hose to a certain extent based on the principle of "thermal expansion"; not only can the "modifier" form a comprehensive and effective covering effect on the surface of the fiber layer; but also it is beneficial to the coating effect of the modifier on the surface of the fiber layer, and during the coating process, it is beneficial to the connection / reaction at the interface;

[0093] Too high a temperature will cause the strength of the hose to change, and will also affect the uniformity and stability of the modifier coating;

[0094] If the temperature is too low, it is not conducive to maintaining the state of the modifier, and the material may flocculate and settle, which is also not conducive to the connection / reaction rate at the interface.

[0095] (9) The surface modification method of the hose provided by the present invention, after the modification agent is applied, the surface is subjected to pressure treatment, which can effectively improve the adhesion stability of the modification agent on the hose surface;

[0096] Improve the stability of the formed "modifier layer";

[0097] If the pressure intensity of the pressurized treatment is too low, it will cause:

[0098] (a) The modified coating after treatment is loose and cannot form a continuous and tight protective layer. It is easily disturbed and damaged, and then fails.

[0099] (b) The treated modifier coating cannot fully contact and adsorb with the fiber layer.

[0100] If the pressure intensity of the pressure treatment is too high, the treated (a) modifier will be excessively squeezed and diffused, the amount of modifier adsorbed per unit area of ​​the fiber layer will be reduced, and the modifier layer will not be continuous and tight enough to fully play its role.

[0101] (10) The surface modification method of the hose provided by the present invention can repeatedly cycle the process of "contact"-"pressurization"-"drying" during the process of modifying the hose surface with a modifier, and finally form multiple layers of "modifier coating" on the hose surface, effectively and durably keeping the modifier on the surface of the hose.

[0102] (11) The surface modification method of the hose provided by the present invention uses a modifier including component three of a hydrophilic material to modify the hose, which can effectively adjust the viscosity of the modifier liquid and improve the coating effect of the modifier on the hose surface;

[0103] By controlling the content of hydrophobic and hydrophilic materials, an alternating, complex, multi-layered structure can be formed. The hydrophobic and hydrophilic materials work together to prevent the adhesion of organic matter and inhibit the scaling and crystallization of salt and particulate matter, thereby enhancing the anti-fouling and anti-blocking effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0104] Figure 1 A picture of the blue carbon wastewater used in Example 10;

[0105] Figure 2 Schematic diagram of ventilation test;

[0106] In the figure: 1. Pressure gauge; 2. Aeration pipe; 3. Air pump; 4. Flow meter; 5. Sewage. DETAILED DESCRIPTION

[0107] The present disclosure may be more easily understood by reference to the following description in conjunction with the accompanying drawings and examples, all of which constitute a part of the present disclosure. It should be understood that the present disclosure is not limited to the specific products, methods, conditions or parameters described and / or shown herein. Further, the terms used herein are only used for the purpose of describing specific embodiments by way of example and are not intended to be limiting unless otherwise stated.

[0108] It should also be understood that, for the sake of clarity, certain features of the present disclosure may be described herein in the context of separate embodiments, but may also be provided in combination with each other in a single embodiment. That is, unless clearly incompatible or specifically not included, each separate embodiment is considered to be combinable with any other embodiment, and the combination is considered to represent another different embodiment. Conversely, for the sake of simplicity, the various features of the present disclosure described in the context of a single embodiment may also be provided individually or in any sub-combination. Finally, although a particular embodiment may be described as part of a series of steps or part of a more general structure, each step or substructure itself may also be considered to be an independent embodiment.

[0109] Unless otherwise indicated, it should be understood that each individual element in a list and each combination of individual elements in the list will be interpreted as a different embodiment. For example, a list of embodiments represented as "A, B, or C" should be interpreted to include embodiments "A", "B", "C", "A or B", "A or C", "B or C", or "A, B, or C".

[0110] In the present disclosure, the singular forms of the articles "a", "an", and "the" also include the corresponding plural references, and a reference to a specific value includes at least that specific value unless the context clearly indicates otherwise. Thus, for example, a reference to "a substance" is a reference to at least one of that substance and equivalents thereof.

[0111] The terms including ordinal numbers such as "first" and "second" can be used to explain various components or fluids, but these components and fluids are not limited by these terms. Therefore, without departing from the teachings of the present disclosure, these terms are only used to distinguish the component / fluid from another component / fluid.

[0112] When items are described by using conjunction terms such as “… and / or…”, the description should be understood to include any one of the associated listed items and all combinations of one or more thereof; for example, A and / or B should be interpreted as an embodiment including “A” but not including “B”, an embodiment including “B” but not including “A”, and an embodiment including “A” and “B”.

[0113] In general, the use of the term "about" indicates an approximate value that may vary depending on the desired properties obtained by the disclosed subject matter, and will be interpreted in a context-dependent manner based on function. Therefore, one of ordinary skill in the art will be able to interpret a certain degree of difference on a case-by-case basis. In some cases, the number of significant figures used when expressing a particular value can be a representative technique for determining the difference allowed by the term "about". In other cases, a gradient in a range of values ​​can be used to determine the range of differences allowed by the term "about". Further, all ranges in this disclosure are inclusive and combinable, and reference to the values ​​stated in the range includes each value within the range.

[0114] Throughout the specification of this application document, when a certain part is described as “including” a certain constituent element, unless otherwise clearly described to the contrary, it does not mean that other constituent elements are excluded but that other constituent elements may also be included.

[0115] Throughout the specification of the present invention, when a certain step is recorded as being "above" or "before" other steps, it not only includes the case where a certain step has a direct time series relationship with other steps, but also includes the same rights as the case where a certain step has an indirect time series relationship where the time series of the order of two steps is changed, such as a mixing step after each step.

[0116] Throughout the specification of the present invention, when it is recorded as "according to any embodiment of the ... aspect of the ... object of the present invention...", unless otherwise clearly stated to the contrary, it does not mean that the constituent elements of the described scheme that appear before and after it are excluded, but that other constituent elements may also be included.

[0117] 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 the invention belongs; the terms used herein and / or include any and all combinations of one or more of the associated listed items.

[0118] In order to demonstrate the technical solutions and advantages of the present invention, the technical solutions in the embodiments of the present invention will be fully described below.

[0119] In the following embodiments:

[0120] 1. Selected hose:

[0121] (1) The pipe diameter is equal to 50 mm.

[0122] (2) Tube wall thickness: 2 mm.

[0123] (3) The material is polyurethane (100%), the overall material is uniform, and there is no inner lining or outer layer made of other materials.

[0124] (4) The hose is in good condition without holes or slits.

[0125] 2. Selected fiber: polypropylene fiber, the fiber diameter is 20 microns.

[0126] 3. Modified liquid used:

[0127] (1) The ingredients are polydimethylsiloxane (PDMS), nanosilicon dioxide (SiO2, particle size 10nm), and sodium carboxycellulose (CMC);

[0128] (2) The solvent is ethanol and water, specifically a 5% ethanol aqueous solution; the ethanol is analytical grade, and the water is ultrapure water.

[0129] (3) Add CMC powder to the solvent to a mass concentration of 5 mg / L. Stir for 5 min and ultrasonicate for 15 min to fully dissolve it. Leave it for 24 hours to remove bubbles.

[0130] (4) adding PDMS to a mass concentration of 4 wt %, stirring for 10 min, and ultrasonically treating for 30 min to obtain a PDMS emulsion.

[0131] (5) Add SiO2 to a mass concentration of 1 g / L, stir for 20 min, and perform ultrasonic treatment for 60 min to ensure uniform dispersion.

[0132] (6) Heat the solution while stirring until the solution temperature reaches 50-55°C and set aside.

[0133] Example 1

[0134] Surface modification of hose:

[0135] S1. Using melt-blowing operation, polypropylene fibers are deposited onto the surface of the hose;

[0136] The polypropylene fiber melt-blown operation:

[0137] (1) The thickness of the polypropylene fiber formed by meltblowing is between 0.2-0.3 mm, and the thickness is relatively uniform everywhere.

[0138] (2) The amount of polypropylene fiber sprayed is 10g / m 2 The spraying amount is more uniform everywhere.

[0139] (3) The meltblowing outlet temperature is 190°C.

[0140] (4) Before melt-blowing, the hose is preheated to 50-55°C.

[0141] (5) During meltblowing, the hose is placed on the support and is in an expanded state rather than a flattened state.

[0142] (6) After melt-blowing, the hose is rolled. The rolling thickness is set to:

[0143] H1=H0+E-Δ

[0144] Among them, H1 is the set rolling thickness after meltblowing; H0 is the hose wall thickness; E is the designed meltblown polypropylene layer thickness; Δ is the rolling adjustment amount, which is 0.8mm and is determined by a small production test.

[0145] (7) During the rolling process, the hose is placed on the support and is in an expanded state rather than a flattened state.

[0146] (8) During the rolling process, the temperature of the hose is between 50-55°C.

[0147] (9) The rolling process is performed for 60 seconds per meter of the hose.

[0148] (10) After the rolling process, the base spraying step is completed.

[0149] S2. Modifying the surface using a modifying liquid;

[0150] (1) Preheat the hose to 50-55°C.

[0151] (2) Immerse the hose completely in the modification liquid, so that its outer surface is in full contact with the hose, and the inner surface does not need to be in contact with the modification liquid. The residence time is 3 minutes. During this period, the modification liquid is continuously stirred.

[0152] (3) During immersion, the hose is placed on the support and is in an expanded state rather than a flattened state.

[0153] (4) Take the hose out of the modified liquid and then roll it. The rolling thickness is set to:

[0154] H3=H2-Δ

[0155] Where H3 is the set rolling thickness after immersion; H1 is equal to H1 in the above formula 1; Δ is the rolling adjustment amount, which is 1mm and is determined by a small production test.

[0156] (5) During the rolling process, the hose is placed on the support and is in an expanded state rather than a flattened state.

[0157] (6) After rolling, dry the hose at 70°C for 120 minutes.

[0158] (7) During the drying process, the hose is placed on the support and is in an expanded state rather than a flattened state.

[0159] (8) After drying, soak again. Do this three times in the order of soaking, rolling, and drying.

[0160] (9) Hose surface modification is completed.

[0161] Example 2-1

[0162] This embodiment is basically the same as Embodiment 1, the only difference being that in the “step 1”, the cotton and linen are deposited on the surface of the hose.

[0163] Example 2-2

[0164] This embodiment is basically the same as Embodiment 1, and the only difference is that in the "step 1", a colloid viscous base hydrogel is used instead of fiber.

[0165] Example 3-1

[0166] This embodiment is basically the same as Embodiment 1, except that: in the process of "S1. Depositing polypropylene fibers onto the surface of the hose by melt-blowing operation;", no rolling operation is performed.

[0167] Example 3-2

[0168] This embodiment is basically the same as the embodiment 1, except that: in step (6) of the process "S1. Depositing polypropylene fibers onto the surface of the hose by melt-blowing operation;" after melt-blowing, the hose is rolled. In the rolling thickness setting, the rolling adjustment amount Δ is set to 1.5 mm, which is beyond the range of 0.1 to 1 mm.

[0169] Example 4

[0170] This embodiment is basically the same as Embodiment 1, except that: in the process of "S2. modifying the surface using a modifying liquid;", no rolling operation is performed.

[0171] Example 5

[0172] This embodiment is basically the same as Embodiment 1, except that: in the process of "S1. Depositing polypropylene fibers onto the surface of the hose by melt-blowing operation;", no rolling operation is performed.

[0173] At the same time, in the process of "S2. modifying the surface using a modifying liquid;", no rolling operation is performed.

[0174] Example 6

[0175] This embodiment is basically the same as Embodiment 1, except that: the step (2) in the process of "S2. modifying the surface using a modifying liquid" is: completely immersing the hose in the modifying liquid so that its outer surface is in full contact with the hose and its inner surface is not in contact with the modifying liquid, and the residence time is 20 minutes, during which the modifying liquid is continuously stirred.

[0176] At the same time, in step (8), the surface modification of the hose is completed after the soaking, rolling and drying are carried out once.

[0177] Example 7

[0178] This embodiment is basically the same as Embodiment 1, except that: the step (4) in the process of "S1. Depositing polypropylene fibers onto the surface of the hose by melt-blowing operation" is: before melt-blowing, there is no need to preheat the hose.

[0179] Example 8

[0180] This embodiment is basically the same as the embodiment 1, except that: the step (1) in the process of "S2. modifying the surface with a modifying liquid" is also eliminated, i.e., there is no need to preheat the hose before contacting with the modifying liquid.

[0181] Example 9

[0182] This embodiment is basically the same as Embodiment 1, except that: the step (4) in the process of "S1. Depositing polypropylene fibers onto the surface of the hose by melt-blowing operation" is: before melt-blowing, there is no need to preheat the hose.

[0183] At the same time, step (1) in the process of "S2. modifying the surface using a modifying liquid;" is also eliminated, that is, there is no need to preheat the hose before contacting with the modifying liquid.

[0184] Example 10

[0185] In this embodiment, the hose obtained by surface modification in embodiments 1 to 9 is used as an aeration tube. According to the required specifications and models, holes or slits are punched or opened in the hose to form an aeration tube, and the hose performance is tested.

[0186] 1. Strength performance verification:

[0187] Tensile test: Refer to GB / T528-2009 for the determination of tensile strength, and use a WDM-10M tensile testing machine for the test. Use a punching machine and a dumbbell-shaped cutter to cut the pipe into a dumbbell shape. The pipe is cut into two pieces of specimens and a single piece is taken. Use a thickness gauge to measure the thickness of the middle and both ends of the dumbbell-shaped specimen, and take the average value to set the thickness value of the tensile testing machine. Clamp the specimen symmetrically on the upper and lower clamps of the tensile testing machine and set the gauge length. The moving speed of the clamp is 500mm / min for tensile testing. Rating the strength of the pipeline according to the test strength:

[0188] Grade 1: low strength, tensile strength range: 10-15MPa;

[0189] Grade 2: Medium strength, tensile strength range: 16-20MPa;

[0190] Grade 3: medium to high strength, tensile strength range: 21-25MPa;

[0191] Grade 4: high strength, tensile strength range: 26-30MPa;

[0192] Grade 5: Extremely high strength, tensile strength range: 31-35MPa.

[0193] 2. Verification of anti-fouling performance:

[0194] Static test: Place the sample in a certain semi-coal wastewater to evaluate the surface pollution. Semi-coal wastewater is a kind of industrial wastewater with complex components and great harm. Because it contains oil, non-degradable organic matter and a large amount of inorganic salts, it is very serious for the aeration pipe to be blocked. The use of semi-coal wastewater can test the anti-fouling performance of the pipe in an extremely unfavorable environment. The water quality is shown in Table 1 and Figure 1 shown.

[0195] Table 1 Water quality indicators

[0196] Serial number Project Name index 1 Oil (mg / L) 200 2 Total phenols (mg / L) 9000 3 Volatile phenol (mg / L) 5500 4 Total nitrogen (mg / L) 4000 5 Ammonia nitrogen (mg / L) 3000 6 CODcr(mg / L) 20000 8 SS(mg / L) 100 9 Dissolved solids (mg / L) 2000 10 pH 9.1～9.8 11 Chroma 400 times

[0197] In the experiment, a 1m long pipe sample was completely immersed in the semi-coal wastewater, and then taken out after 24 hours of immersion to observe the surface condition of the sample. The pollution degree was rated according to the observation results:

[0198] Level 1: No visible contamination, Description: There is no obvious visible stain or discoloration on the hose surface.

[0199] Level 2: Slightly soiled, Description: The hose surface has slight stains or discoloration, but it has no noticeable effect on the overall appearance.

[0200] Level 3: Moderate contamination, Description: There is obvious staining or discoloration on the hose surface, which may cause local color change or fading.

[0201] Level 4: Severe contamination, Description: There is significant contamination on the hose surface, and there may be large areas of color changes, spots or attachments.

[0202] Level 5: Very serious pollution, description: The hose surface is seriously polluted, there may be serious attachments, deterioration or damage.

[0203] 3. Anti-blocking performance verification:

[0204] Ventilation test: Figure 2 As shown, a 2m sample was completely immersed in the sewage as described in Table 1, with a depth of 1.5m. 3 / h flow rate of air for 24h. Record the change of ventilation pressure. The same pollution resistance test of semi-coal wastewater can test the anti-blocking performance of the hose used as aeration pipe in extremely adverse environment.

[0205] The anti-blocking performance of the sample is evaluated based on the ratio of the pressure difference at the beginning and end of ventilation to the pressure value at the initial ventilation, as shown in Formula 3.

[0206]

[0207] Where P t P0 is the pressure at the end of ventilation, and P0 is the pressure at the initial ventilation. The anti-blocking performance of the sample is rated based on this ratio.

[0208] Level 1: The ventilation pressure difference is less than 20%. Description: During the ventilation process of the hose, the ventilation pressure changes very little, achieving a good anti-blocking effect.

[0209] Level 2: The ventilation pressure difference is between 20% and 40%. Description: During the ventilation process of the hose, the ventilation pressure changes little, showing better anti-blocking performance.

[0210] Level 3: The ventilation pressure difference is between 40% and 60%. Description: During the ventilation process of the hose, the ventilation pressure changes moderately and the anti-blocking performance is general.

[0211] Level 4: The ventilation pressure difference is between 60% and 90%. Description: During the ventilation process of the hose, the ventilation pressure changes greatly and there is a certain risk of blockage.

[0212] Level 5: The ventilation pressure difference is greater than 90%. Description: During the ventilation process of the hose, the ventilation pressure changes significantly and rapidly, and it is seriously blocked.

[0213] Table 2 Strength, pollution resistance and anti-blocking performance are as follows

[0214]

[0215] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for surface modification of a hose, characterized in that: The following steps are involved: S1. Spray the fiber onto the surface of the hose; S2. Modifying the surface treated by S1. using a modifying liquid; S3. Drying the surface treated in S2.; The modified liquid comprises component one, component two and component three; The first component is any one or two of polydimethylsiloxane and hexadecyltrimethoxysilane, The second component is nano silicon dioxide. The component three is any one or two or more of sodium carboxylated cellulose, sodium alginate, and carboxylated chitosan; the mass ratio of the component one, the component two, and the component three is (0.004-0.006): (35-45): (0.8-1.2); and the concentration of the component three is 4-6 mg / L.

2. The method for surface modification of a hose according to claim 1, characterized in that: The S1. includes: S1.

1. heating the surface; S1.

2. Spray the fiber onto the surface of the hose; S1.

3. Apply pressure to the surface treated in S1.

2.

3. The method for surface modification of a hose according to claim 2, characterized in that: In S1.1., the heating temperature is 45 to 70° C.; and / or, In S1.3., during the pressure treatment, the heating temperature of the surface is 45 to 70°C.

4. The method for surface modification of a hose according to claim 2, characterized in that: In S1., the spraying amount of the fiber is 10 to 55 g / m 2 and / or, In S1., the spraying thickness E of the fiber is 0.1 to 0.7 mm.

5. The method for surface modification of a hose according to any one of claims 2 to 4, characterized in that: In S1., during the pressurization treatment, the pressure is 0.5-2 MPa; and / or, In S1., during the pressurization treatment, the pressurization thickness H1 is set to: H1=H0+E-Δ(Formula 1) in, H0 hose wall thickness; E is the deposited thickness of the fiber; Δ is the adjustment amount, and its value ranges from 0.1 to 1 mm.

6. The method for surface modification of a hose according to any one of claims 1 to 5, characterized in that: The S2 includes: S2.

1. contacting the modified liquid with the surface; S2.

2. Apply pressure to the surface to perform a pressure treatment.

7. The method for surface modification of a hose according to claim 6, characterized in that: In S2.1., the temperature of the modified liquid is maintained at 45 to 70° C. during contact; In S2.2., during the pressure treatment, the heating temperature of the surface is 45 to 70°C.

8. The method for surface modification of a hose according to claim 6, characterized in that: In S2., during the pressurization treatment, the pressure is 0.5-2 MPa; and / or, and / or, In S2., during the pressurization treatment, the pressurization thickness H3 is set to: H3=H2-Δ (Formula 2) Wherein, H2 is the wall thickness of the hose after the S1. treatment is completed; Δ is the adjustment amount, and its value ranges from 0.1 to 1 mm.

9. The method for surface modification of a hose according to any one of claims 1 to 8, characterized in that: In S1., when the fiber is sprayed, the surface is in a stretched state; and / or, In S1., when the pressure treatment is performed, the surface is in a stretched state; and / or, In S2., when contact is made, the surface is in an extended state; and / or, In the above S2., when the pressure treatment is performed, the surface is in a stretched state.

10. Use of the hose according to any one of claims 1 to 9, characterized in that: Apply it to industrial water treatment.

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