CN215981237U - Oxygen-resistant pipe with super-hydrophobic function - Google Patents
Oxygen-resistant pipe with super-hydrophobic function Download PDFInfo
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Abstract
The utility model relates to an oxygen-resistant pipe with a super-hydrophobic function, which is characterized by having a five-layer structure, wherein the pipe sequentially comprises an anti-scale inner layer, a transition layer, a hot melt adhesive layer, an oxygen-resistant layer and a super-hydrophobic outer layer from inside to outside. The utility model has the advantages that: by introducing the anti-scaling inner layer, the super-hydrophobic anti-scaling function of the water pipeline can be provided; by introducing the transition layer, the harm of the delamination of the anti-scaling inner layer and the hot melt adhesive layer can be effectively solved; by introducing the oxygen barrier layer, oxygen permeation can be inhibited, bacterial breeding in the pipeline can be inhibited, and oxidation corrosion of the metal insert in the pipeline system can be prevented; by introducing the super-hydrophobic outer layer, the possibility of dewing and frosting on the surface of the pipe can be reduced to a certain degree. The utility model discloses a can be applied to building pipeline preparation, especially walk life feed pipe and air conditioner pipeline, the radiation furred ceiling pipeline that the top was laid.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of pipes, in particular to an oxygen-resistant pipe with a super-hydrophobic function.
[ background of the utility model ]
With the progress and development of society, more and more plastic water conveying pipelines replace heavy metal pipelines. However, in the civil or industrial water pipe, scale is generated on the inner surface of the pipe when the pipe is used for a long time, oxygen in the atmosphere permeates into the pipe system through the pipe wall, the metal inserts and other parts connected with the plastic pipe are easily induced to generate oxidation corrosion to generate iron rust, and the permeation of the oxygen can also cause the breeding of microorganisms to generate bacterial fouling. These all can cause harmful effects to the quality of water of carrying, influence human health, and the surface dirt can make intraductal flow area reduce along with the increase of pipeline live time, block the pipeline even, not only influence the water delivery capacity of system, still greatly increased pipeline water delivery energy consumption.
When the traditional buried pipe laying occurs pipeline water leakage, the traditional buried pipe laying is not easy to find and has great maintenance difficulty, and neighborhood disputes are easy to cause. Therefore, in recent years, pipeline roofing has become increasingly popular. In addition, the development of novel refrigerating and heating systems such as a central air conditioner, a radiation ceiling and the like can also use pipeline products on the top of the ceiling. But after the pipeline was walked on one's head, when indoor humidity was higher, when the raceway had great difference in temperature with the external world, the easy dewfall of pipeline surface appears leaking even, can destroy the furred ceiling structure when serious, causes big loss. After the surface of the pipe is subjected to super-hydrophobic treatment, the surface energy is obviously reduced, and the condensation time and the condensation amount can be slowed down to a certain extent. After the common super-hydrophobic surface is condensed, the contact angle can be obviously reduced, so that the super-hydrophobic surface loses effectiveness, and therefore, the phenomenon of dewing still occurs when the super-hydrophobic surface is in a high-temperature and high-humidity environment for a long time. However, the problem of condensation can be further alleviated by appropriate surface roughness treatment and the structure of the nano-microstructure. Because the nano-microstructure is narrow enough, condensed liquid drops can not invade into the gap of the microstructure, and the durability of the super-hydrophobicity of the surface can be maintained.
Therefore, if the inner wall and the outer layer of the pipe can be subjected to nano microstructure and proper surface roughness treatment, the long-acting super-hydrophobic purpose can be realized, and the oxygen permeation is inhibited through the oxygen barrier layer, so that the problems of scaling of the inner wall and dewing of the outer layer of the pipe can be fundamentally solved.
[ Utility model ] content
The utility model aims to overcome the defects of the prior art and provide an oxygen barrier pipe with a super-hydrophobic function.
The utility model is realized by the following technical scheme:
an oxygen barrier pipe with a super-hydrophobic function is characterized by having a five-layer structure, and sequentially comprising an anti-scale inner layer, a transition layer, a hot melt adhesive layer, an oxygen barrier layer and a super-hydrophobic outer layer from inside to outside; a transition layer and a hot melt adhesive layer are arranged between the anti-scaling inner layer and the oxygen-resisting layer; arranging a super-hydrophobic outer layer on the oxygen barrier layer;
the scale control inlayer, the transition layer, hot melt adhesive layer, hinder oxygen layer and super hydrophobic outer thickness ratio and be 1: 4: 1: 2: 1.
and a single-screw extruder is adopted to extrude the four-layer composite pipe by four-layer coextrusion, and then the super-hydrophobic outer layer is coated.
The materials of the anti-scaling inner layer and the transition layer comprise polyolefin resin, a super-hydrophobic agent and a processing aid; in addition, the material of the transition layer also comprises a coloring agent.
In the materials of the anti-scaling inner layer and the transition layer, polyolefin resin is one or a mixture of PP-R, PE-RT, PE and PB; the super-hydrophobic agent is polyolefin modified material containing fluorine or silicon group, and fluorine-containing organic silicon modified nano SiO2One or more of particles and polysiloxane; the processing aid is one or a mixture of an antioxidant, a lubricant and a compatilizer;
wherein, the anti-scale inner layer can provide the super-hydrophobic anti-scale function for the water pipeline; the transition layer can effectively solve the harm of the layering of the anti-scaling inner layer and the hot melt adhesive layer.
The hot melt adhesive layer is made of a conventional hot melt adhesive for polyolefin;
the fourth layer is an oxygen barrier layer, the oxygen barrier layer is made of EVOH (ethylene-vinyl alcohol copolymer), and the mass fraction of polyvinyl alcohol in the EVOH is 60-85%;
the fifth layer is a super-hydrophobic outer layer.
The EVOH has two functions, namely, inhibition of oxygen permeation and guarantee of the sanitation monitoring of the pipe; and secondly, abundant hydroxyl groups are provided, and the hydroxyl groups can be chemically bonded with the super-hydrophobic outer layer material, so that the bonding strength of the super-hydrophobic outer layer is ensured.
The fifth layer of super-hydrophobic outer layer passes through PVA/gas phase nano SiO2Hybrid solution application to increase surface roughnessAnd reducing the surface energy by a fluorine-containing organic silicon coupling agent to form a nano super-hydrophobic surface. The super-hydrophobic outer layer can not only improve the problem that the oxygen barrier performance of EVOH is reduced due to moisture absorption, but also reduce the possibility of dewing on the surface of the pipe.
The preparation method of the fifth layer super-hydrophobic outer layer of the pipe comprises the following steps: firstly, the pipe is passed through PVA/gas phase nano SiO2The coating equipment of the hybrid solution is dried by a drying oven, then passes through a fluorine-containing organic silicon coupling agent-ethanol-water mixed solution soaking device, and finally is dried to obtain the coating equipment.
Compared with the prior art, the utility model has the following positive effects:
1. through the introduction of the anti-scale inner layer and the transition layer, the super-hydrophobic anti-scale function of the inner wall of the water pipeline is improved, and the introduction of the transition layer can effectively solve the problem of the layering of the anti-scale inner layer and the hot melt adhesive layer.
2. The EVOH hinders the oxygen layer is introduced, on the one hand can restrain oxygen infiltration, restraines the inside bacterial growing of pipe-line system, has certain sanitary effect, can also prevent after hindering the oxygen that metal inserts and other parts that link to each other with the plastic tubing from taking place the oxidation corrosion.
3. The super-hydrophobic outer layer is combined with surface roughness treatment and low surface energy modification, so that the problem that the oxygen resistance performance of the EVOH oxygen barrier layer rich in hydroxyl is reduced due to moisture absorption can be solved, and the problem of dewing on the outer surface of the pipeline can be solved to the greatest extent.
4. The product has reasonable structure, simple preparation process and operation, and can realize industrial production.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of an oxygen barrier tube with a superhydrophobic function according to the present application:
the labels in the figures are: 1 antiscale inner layer, 2 transition layers, 3 hot melt adhesive layers, 4 oxygen-resistant layers and 5 super-hydrophobic outer layers.
[ detailed description ] embodiments
The following provides a specific embodiment of the oxygen barrier tube material with the super-hydrophobic function.
Example 1
An oxygen-resistant pipe with a super-hydrophobic function is shown in figure 1, wherein an inner layer 1 of the pipe is an anti-scale inner layer, a second layer 2 of the pipe is a transition layer, a third layer 3 of the pipe is a hot melt adhesive layer, a fourth layer 4 of the pipe is an EVOH oxygen-resistant layer, and a fifth layer 5 of the pipe is a super-hydrophobic outer layer.
The base resin of the anti-scaling inner layer and the transition layer of the pipe is PP-R;
the super-hydrophobic agent of the anti-scale inner layer and the transition layer of the pipe is fluorine-containing organic silicon modified nano SiO2Particles, in particular to nano SiO modified by tridecafluorooctyltriethoxysilane coupling agent with a contact angle of 135 degrees2Particles having a particle size of 45 nm;
the processing aids of the anti-scaling inner layer and the transition layer of the pipe are antioxidant and lubricant, and the mass ratio of the antioxidant to the lubricant is 1: 1, wherein the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168, and the lubricant is a PPA auxiliary agent.
The third layer of hot melt adhesive layer of the pipe is made of maleic anhydride grafted polypropylene.
The fourth oxygen barrier layer of the pipe is made of EVOH, the EVOH is a copolymer of polyvinyl alcohol and ethylene, and the mass fraction of the polyvinyl alcohol in the EVOH is 76%;
the fifth layer of the super-hydrophobic outer layer of the pipe is prepared by adopting a two-step process, specifically, the surface with a rough micro-nano structure is prepared by adopting a sol-gel method, and the surface has low surface energy and super-hydrophobic characteristics by adopting a surface modification method.
The specific preparation method of the pipe comprises the following steps:
(1) preparing an anti-scaling inner layer and a transition layer material by adopting a double-screw extruder respectively, wherein each layer comprises the following components in parts by weight: the anti-scaling inner layer comprises 90 parts of PP-R resin, 8 parts of super-hydrophobic agent and 2 parts of processing aid; the transition layer comprises 94.5 parts of PP-R resin, 3 parts of coloring agent, 2 parts of super-hydrophobic agent and 0.5 part of processing aid.
(2) And a single-screw extruder is adopted to extrude the four-layer composite pipe by four-layer coextrusion.
(3) After the pipe is cooled on line, the pipe is cooled by PVA/gas phase nano SiO2The coating thickness of the coating equipment of the hybrid solution is 0.2-0.6 mu m, and then the coating equipment is dried by a drying oven. Wherein, PVA/gas phase nano SiO2The mass ratio of the hybridization solution is as follows:
PVA: gas phase nano SiO2: water 6: 2.5: 100.
(3) the pipe passes through a fluorine-containing organic silicon coupling agent-ethanol-water mixed solution soaking device, wherein the fluorine-containing organic silicon coupling agent is tridecafluorooctyltriethoxysilane, and the mass ratio of the tridecafluorooctyltriethoxysilane to the ethanol to the water is 1: 94: and 5, forming a final super-hydrophobic protective film by drying.
Example 2
An oxygen-resistant pipe with a super-hydrophobic function is shown in figure 1, wherein an inner layer of the pipe is an anti-scale inner layer, a second layer is a transition layer, a third layer is a hot melt adhesive layer, a fourth layer is an EVOH oxygen-resistant layer, and a fifth layer is a super-hydrophobic outer layer.
The base resin of the anti-scaling inner layer and the transition layer of the pipe is PE-RT;
the super-hydrophobic agent of the anti-scale inner layer and the transition layer of the pipe is fluorine-containing organic silicon modified nano SiO2Particles, in particular to heptadecafluorodecyltrimethoxysilane coupling agent modified nano SiO with a contact angle of 137 DEG2Particles having a particle size of 40 nm;
the processing aids of the anti-scaling inner layer and the transition layer of the pipe are antioxidant and lubricant, and the mass ratio of the antioxidant to the lubricant is 1: 1, wherein the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168, and the lubricant is a PPA auxiliary agent.
The third layer of hot melt adhesive layer of the pipe is made of maleic anhydride grafted high-density polyethylene.
The fourth oxygen barrier layer of the pipe is made of EVOH, the EVOH is a copolymer of polyvinyl alcohol and ethylene, and the mass fraction of the polyvinyl alcohol in the EVOH is 76%;
the fifth layer of the super-hydrophobic outer layer of the pipe is prepared by adopting a two-step process, specifically, the surface with a rough micro-nano structure is prepared by adopting a sol-gel method, and the surface has low surface energy and super-hydrophobic characteristics by adopting a surface modification method.
The specific preparation method of the pipe comprises the following steps:
(1) preparing an anti-scaling inner layer and a transition layer material by adopting a double-screw extruder respectively, wherein each layer comprises the following components in parts by weight: the anti-scaling inner layer comprises 90 parts of PE-RT resin, 8 parts of super-hydrophobic agent and 2 parts of processing aid; the transition layer comprises 94.5 parts of PE-RT resin, 3 parts of coloring agent, 2 parts of super-hydrophobic agent and 0.5 part of processing aid.
(2) And a single-screw extruder is adopted to extrude the four-layer composite pipe by four-layer coextrusion.
(3) After the pipe is cooled on line, the pipe is cooled by PVA/gas phase nano SiO2The coating thickness of the coating equipment of the hybrid solution is 0.2-0.6 mu m, and then the coating equipment is dried by a drying oven. Wherein, PVA/gas phase nano SiO2The mass ratio of the hybridization solution is as follows:
PVA: gas phase nano SiO2: water 6: 2.5: 100.
(3) the pipe passes through a fluorine-containing organic silicon coupling agent-ethanol-water mixed solution soaking device, wherein the fluorine-containing organic silicon coupling agent is heptadecafluorodecyltrimethoxysilane, and the mass ratio of the heptadecafluorodecyltrimethoxysilane to the ethanol to the water is 1: 94: and 5, forming a final super-hydrophobic protective film by drying.
Example 3
An oxygen-resistant pipe with a super-hydrophobic function is shown in figure 1, wherein an inner layer of the pipe is an anti-scale inner layer, a second layer is a transition layer, a third layer is a hot melt adhesive layer, a fourth layer is an EVOH oxygen-resistant layer, and a fifth layer is a super-hydrophobic outer layer.
The base resin of the inner scale-proof layer and the transition layer of the pipe is PB;
the super-hydrophobic agent of the anti-scale inner layer of the pipe is heptadecafluorodecyltrimethoxysilane coupling agent modified nano SiO2The particle and the PB modified material containing silicon groups, the processing aid is a lubricant, and the lubricant is a PPA aid. Wherein, the modified nano SiO2The particle size of (A) is 40 nm; the preparation method of the PB modified material containing the silicon groups comprises the steps of melting, blending and granulating high molecular weight polysiloxane and PB in an extruder, wherein the mass fraction of the polysiloxane is 30%.
The super-hydrophobic agent of the second transition layer of the pipe is a PB modified material containing silicon groups, the processing aid is a lubricant, and the lubricant is a PPA aid.
The fourth oxygen barrier layer of the pipe is made of EVOH, the EVOH is a copolymer of polyvinyl alcohol and ethylene, and the mass fraction of the polyvinyl alcohol in the EVOH is 76%;
the fifth layer of the super-hydrophobic outer layer of the pipe is prepared by adopting a two-step process, specifically, the surface with a rough micro-nano structure is prepared by adopting a sol-gel method, and the surface has low surface energy and super-hydrophobic characteristics by adopting a surface modification method.
The specific preparation method of the pipe comprises the following steps:
(1) preparing an anti-scaling inner layer and a transition layer material by adopting a double-screw extruder respectively, wherein each layer comprises the following components in parts by weight: the scale prevention inner layer comprises 94 parts of PB resin, 5 parts of super-hydrophobic agent and 1 part of processing aid; the transition layer comprises 95 parts of PB resin, 3 parts of a coloring agent, 1.5 parts of a super-hydrophobic agent and 0.5 part of a processing aid.
(2) And a single-screw extruder is adopted to extrude the four-layer composite pipe by four-layer coextrusion.
(3) After the pipe is cooled on line, the pipe is cooled by PVA/gas phase nano SiO2The coating thickness of the coating equipment of the hybrid solution is 0.2-0.6 mu m, and then the coating equipment is dried by a drying oven. Wherein, PVA/gas phase nano SiO2The mass ratio of the hybridization solution is as follows:
PVA: gas phase nano SiO2: water 6: 2.5: 100.
(3) the pipe passes through a fluorine-containing organic silicon coupling agent-ethanol-water mixed solution soaking device, wherein the fluorine-containing organic silicon coupling agent is hexadecyl trimethoxy silane, and the mass ratio of the hexadecyl trimethoxy silane to the ethanol to the water is 1: 94: and 5, forming a final super-hydrophobic protective film by drying.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the concept of the present invention, and these modifications and decorations should also be regarded as being within the protection scope of the present invention.
Claims (1)
1. An oxygen barrier pipe with a super-hydrophobic function is characterized by having a five-layer structure, and sequentially comprising an anti-scale inner layer, a transition layer, a hot melt adhesive layer, an oxygen barrier layer and a super-hydrophobic outer layer from inside to outside; a transition layer and a hot melt adhesive layer are arranged between the anti-scaling inner layer and the oxygen-resisting layer; coating a super-hydrophobic outer layer on the oxygen barrier layer;
the scale control inlayer, the transition layer, hot melt adhesive layer, hinder oxygen layer and super hydrophobic outer thickness ratio and be 1: 4: 1: 2: 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121445247.6U CN215981237U (en) | 2021-06-28 | 2021-06-28 | Oxygen-resistant pipe with super-hydrophobic function |
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| CN202121445247.6U CN215981237U (en) | 2021-06-28 | 2021-06-28 | Oxygen-resistant pipe with super-hydrophobic function |
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