WO2022011959A1 - 一种对基于ptfe膜进行纳米深度表面活化的方法 - Google Patents
一种对基于ptfe膜进行纳米深度表面活化的方法 Download PDFInfo
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- WO2022011959A1 WO2022011959A1 PCT/CN2020/136604 CN2020136604W WO2022011959A1 WO 2022011959 A1 WO2022011959 A1 WO 2022011959A1 CN 2020136604 W CN2020136604 W CN 2020136604W WO 2022011959 A1 WO2022011959 A1 WO 2022011959A1
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Definitions
- the invention relates to the technical field of polymer composite materials, in particular to a method for nanometer depth surface activation of a PTFE-based membrane.
- Wind turbines installed in high-altitude, mountainous and low-temperature, freezing areas in China are affected by the climate, and the blades freeze to varying degrees every winter, resulting in abnormal operation of the blades, and the output power of the fan cannot reach the guaranteed power. There are even blade breakage accidents.
- the insufficiency of the technical methods and performances of icing and anti-icing on the blade surface has a direct impact on wind power, which leads to the loss of wind power benefits, and constitutes a shared safety risk in the operation of the unit.
- Solving the problem of wind turbine blade icing is an important issue in the wind power industry worldwide. Domestic and foreign scientific research institutions and the wind power industry have been conducting relevant research on anti-icing technology materials for wind turbine blades.
- Patent JP2003113254 invented a wind power blade coating, which uses polyvinyl fluoride, polyvinylidene fluoride, dry ice, carbon powder, tung oil, polyvinyl formal, polyether Imide, straw powder, preservatives, dispersants and leveling agents are used as raw materials to form a porous super-hydrophobic polyvinylidene fluoride fluoride film coating, in order to achieve good anti-icing performance.
- Patent WO2006058233 discloses a self-cleaning anti-reflection film composed of homogenous double-layer SiO 2 and polytetrafluoroethylene and its preparation method for blade anti-icing.
- Patent US20170028361 discloses a PFSA/PTFE composite membrane for blade anti-icing, which includes: dissolving perfluorosulfonic acid in an aqueous solution of a low-boiling organic alcohol solvent; then adding a high-boiling organic solvent and silica sol to the solution to prepare The resin solution for film-making is formed; the film-forming machine drives the base film-expanded PTFE microporous film to run on the bearing roller of the film-forming machine, and the base film is first immersed in the low-concentration resin solution, and then at 40- After drying at 100°C, the dried base film is continuously immersed in a high-concentration solution, and then dried at 40-100°C.
- Patent EP2767330 discloses a composite material comprising a porous PTFE membrane for blade anti-icing, the porous PTFE membrane comprising an intermediate PTFE membrane having a pore size of from about 2 nanometers to about 20 nanometers, the porous PTFE membrane being interposed and being Bonded between porous fluoropolymer membranes with larger pore sizes.
- Patent CN101821500A invents a method for deicing a blade of a wind turbine, a wind turbine and a method of using the same, the method is used for deicing the blade of the wind turbine after the wind turbine has been shut down for a period of time, by forming an accelerated state in the blade and then The method of creating a deceleration state shakes the ice off the blades, but for large wind turbines, the amplitude of the blade root is small, and this solution is difficult to achieve.
- Patent 201610675902.4 discloses a preparation method and application of a composite film based on PTFE and polyester for anti-icing of wind power blades, including lamination and compounding with adhesive compound, application of interface adhesive, and light-induced pressure with pressure-sensitive adhesive.
- Sensitive adhesive application wherein the adhesive compound consists of 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate, vinyl acetate, urethane, alpha-linolenic acid, benzoyl peroxide , (4) ethoxylated bisphenol A dimethacrylate and the like.
- the photo-initiated pressure sensitive adhesive is composed of poly[butyl acrylate-glycidyl methacrylate-n-butoxymethacrylamide] copolymer, butyl acrylate, (4) ethoxylated bisphenol A dimethacrylate, 4 ,4'-bis(diethylamino)benzophenone, dimethylformamide, etc., to solve the technical problem of non-adhesion that the PTFE-based polyester composite film cannot be directly pasted on the surface of wind turbine blades through adhesives, and improves the Adhesive peel strength, anti-icing for various types of wind turbine blades.
- Patent 201610670830.4 discloses a preparation method and application of a nano-modified PTFE and polyester-based composite film for anti-ice coating of wind turbine blades, including the application of PTFE-modified film, lamination and photocrosslinking adhesive.
- the modifier is composed of antimony-doped tin oxide nanocrystals, nano-titanium dioxide, nano-silicon carbide, organic fluorine water repellent, pentaerythritol tris (3 aziridine) propionate; laminated composite is composed of 3 isocyanate methyl 3 ,5,5 trimethylcyclohexyl isocyanate, vinyl acetate, urethane, alpha linolenic acid, (2) ethoxylated bisphenol A dimethacrylate, trimethylolpropane trimethacrylate, It is composed of benzoyl oxide; the photocrosslinking adhesive is composed of poly[butyl acrylate-glycidyl methacrylate-n-butoxymethacrylamide
- Patent 201610675902.4 discloses a preparation method and application of a composite film based on PTFE and polyester for anti-icing of wind power blades, including lamination and compounding with adhesive compound, application of interface adhesive, and light-induced pressure with pressure-sensitive adhesive. Sensitive adhesive application.
- Patent 201610452541.7 discloses a self-adhesive carbon fiber, steel fiber modified polytetrafluoroethylene material and its preparation method for blade anti-icing, using steel fiber and carbon fiber to improve the tensile strength and friction performance of polytetrafluoroethylene At the same time, the improved melting method is used to sinter fine fillers such as SiO 2 and Al powder to the surface of PTFE at high temperature, which improves the surface sintering state of PTFE and significantly improves the bonding strength.
- Patent 201310018649.1 discloses a preparation method of PTFE self-adhesive flexible film tape for blade anti-icing, which uses polytetrafluoroethylene dispersion resin, adds a certain amount of silicone and solvent oil, and mixes it uniformly at 50 ° C Curing for more than 12h in an oven; pre-pressing the aged powder into a columnar blank; putting it into an extruder to extrude a circular strip with a diameter of 20-25mm, and placing it in warm water for heat preservation, and then passing through The large-roller calender is pressed into a film, and through the processes of degreasing, transverse stretching, longitudinal stretching, transverse stretching, shaping and slitting, etc., a PTFE film tape product with excellent performance for the sealing industry is finally obtained.
- Patent 201720057571.8 discloses a light-controlled heat insulation film for blade anti-icing, which is PET film, titanium dioxide layer, polytetrafluoroethylene film, hot melt adhesive layer, PET base film, anti-scratch layer and Infrared blocking layer.
- Patent 201610990370.3 discloses a double-layer spinning film for blade anti-icing and a preparation method thereof. The upper layer of the anti-icing double-layer spinning film is a super-hydrophobic spinning film sprayed with silica coating, and the lower layer is a super-hydrophobic spinning film sprayed with silica coating. Hydrophilic spinning film of anti-icing fluid.
- Changsha University of Science and Technology Liu Shengxian et al. analyzed the dynamic characteristics of fan blades under different icing conditions, defined the parameters of the blade icing state, simulated and obtained the eigenvalue indicators under the icing state of the blade, and studied a method based on vibration detection.
- Wind turbine blade icing status diagnosis technology Goldwind has developed an electric heating deicing technology solution, which pre-embeds heating elements such as carbon fiber electric heating film or resistance wire in the blade coating, such as carbon fiber, heating resistance, metal heating mesh, conductive heating film or other heating elements, etc.
- Yunda Wind Power has developed a deicing technology of hot gas generated by inputting electric heating into the blade cavity. By arranging hot gas ventilation pipes in the blade cavity, and adding a heating device in the fan hub, the hot gas or other radiation sources are heated. The hot gas forms a circulation in the ventilation pipe, and the heat is transferred to the outer surface of the blade through the blade shell, so that the blade has a certain temperature.
- the PTFE-based material has the performance advantage of low surface tension, after the PTFE-based film is made, it is still unable to resist the adhesion of ice crystals on the fan blade only by relying on its low surface tension non-adhesion performance, and thus cannot achieve the true anti-adhesion performance.
- the effect and purpose of anti-icing on the fan blade surface if the measures to modify PTFE are not taken, the PTFE-based membrane made cannot be directly and firmly bonded on the surface of the fan blade, and the modified PTFE-based membrane has the advantage of low surface tension performance. will be greatly reduced.
- the present invention provides a method for nano-depth surface activation of PTFE-based membrane, which covers the functional surface of PTFE-based nano-functional composite membrane with nano-scale and micro-scale concave-convex geometric ultrastructure morphology.
- the single side of the film to which the adhesive is applied is subjected to surface activation treatment at a speed of 1.5-3 m/min in a vacuum environment and a nitrogen-hydrogen mixed medium atmosphere below 40 °C, so that the sizing surface of the film has a Nanometer-depth activated structure layer;
- the high-toughness cold-bonded adhesive tape is migrated and compounded on the membrane surface with the activated structure layer based on the PTFE nano-functional composite membrane through the mechanical sizing device, so that the characteristic groups of the glue are related to the activated structure of the membrane.
- the layers undergo chemical bonding to form an adhesive film complex;
- the high toughness cold adhesive is prepared as follows: PVA-1788 0.2kg, butyl acrylate 18kg, acrylic acid 0.5kg, vinyl acetate 1.0kg, methyl methacrylate 1.0kg, silicone monomer 1.5kg, TO- 7 0.01kg, 0.01kg of sodium dodecylbenzenesulfonate, 0.05kg of benzoyl peroxide, and 80kg of water were added to the preparation tank, the preparation temperature was 85°C, and the preparation time was 5h. After vacuuming and removing water, the solid content was obtained. It is a 18.7% tape-like pressure-sensitive adhesive tape, which is laminated on a release paper and then rolled on a PVC pipe core.
- the present invention enables nanometer-depth surface activation of the PTFE-based nano-functional composite membrane, so that the surface of the PTFE-based nano-functional composite membrane can produce an active structure layer with a nanometer depth, and the active structure layer can chemically bond with the characteristic groups of the glue. It produces a strong affinity and high-strength bonding performance between the film and the glue, forming a film-adhesive composite, realizing film/adhesive bonding, film/film bonding, and film/paste base bonding.
- the adhesive strength and adhesive peeling force and the durability of the adhesive force are improved at the same time, which solves the technical problem that the PTFE material is not bonded with any material.
- the functional surface of the PTFE nano-functional composite membrane is covered with a PE membrane.
- the aforementioned method for activating a nanometer depth surface based on a PTFE membrane is characterized in that: the PTFE nanofunctional composite membrane with nanoscale and microscale size concave-convex geometric ultrastructure morphology is prepared according to the following steps:
- the prepared PTFE rods are fused and polymerized under the action of hot calendering, the hot calendering temperature is 60-90°C, and the speed is 20-30/min. Machine extruded to obtain a PTFE-based nano-functional composite membrane with micron-scale pores, and rolled into rolls;
- the fibrous structure after the film cracking occurs after the layered exfoliation, resulting in a PTFE-based membrane with a nano-scale and micro-scale nano-scale and micro-scale geometric ultra-structured morphology of micropores.
- the thickness of the PTFE membrane is 100-120um, and the membrane color is milky white;
- the PTFE-based nano-functional composite membrane with micron-scale micro-concave-convex surface structure is micro-polymerized in a degreasing oven by temperature action.
- the temperature in the degreasing oven is 180-200 °C, and the PTFE resin that has not been squeezed out by the hot calender is infiltrated.
- the silicone oil in which the monomer is polymerized is polymerized and consolidated in the PTFE resin through temperature action to obtain a PTFE-based homogenous film. speed for coiling;
- the temperature in the high temperature and high line pressure micro-eutectic cavity is set at 70 to 420 °C.
- the PTFE nano-functional composite membrane Based on the PTFE nano-functional composite membrane, it is pushed forward at a speed of 6 to 8 m/min. The pores become nanoscale and ultra-micron-scale, and the surface line pressure of the PTFE membrane is controlled to 50-80N/m, so that the membrane changes from milky white to transparent color with uniform transparency, maintaining the original nanoscale and micron-based PTFE nano-functional composite membrane.
- the present invention adopts monomer fusion polymerization and micro-polymerization technology to prepare the membrane into a concave-convex geometric ultrastructure with multiple nano-scale and micro-scale dimensions.
- the PTFE-based membrane has functional properties such as ultra-low surface tension, hydrophobicity, non-adhesion, high anti-fouling, anti-hygroscopicity and self-cleaning; using ultra-high temperature and high pressure micro-eutectic technology to enhance the structural strength of the membrane , solves the technical bottleneck that PTFE has a fibrous structure after laminar peeling when the film is cracked at high temperature, and the wear resistance is reduced, the pores become smaller by the effect of temperature, and the transparency of the film and the consistency of transparency are improved.
- the nano-functional composite membrane based on PTFE has an ultra-structured surface morphology, and at the same time, the membrane has high abrasion resistance, wear toughness and impact resistance; the nano-depth surface activation technology is used to make the membrane and the adhesive form chemical bonds. It can enhance the bonding strength and the durability of bonding peeling force and bonding force;
- the present invention specially prepares a high-toughness cold-pasting adhesive with a cold-pasting function, which can be directly cold-pasted and bonded, and the high-toughness cold-adhesive adhesive has high peel strength ,
- the tensile elongation at break and impact strength are relatively large, the hardness and tensile elastic modulus are relatively small, the ultraviolet aging resistance and aging resistance time are long, there is no obvious plastic deformation property, and the thermal expansion and cold contraction stress is less than the elasticity of the glue limit, so that the glue is always in a tough state, with high bonding strength and long-lasting bonding peeling force;
- the PTFE-based nano-functional composite film prepared by the present invention has higher transparency, does not change the original surface color of the sticking blade, has a thickness of 100-200um, a weight of 200-300g/m 2 , a surface roughness of 0.18um, and a Increasing the load on the fan blade can improve the aerodynamic performance of the blade airfoil and improve the operating efficiency of the blade;
- the PTFE nano-functional composite membrane prepared by the present invention can chemically bond with the characteristic group of the adhesive without modifying the PTFE material, so that a strong affinity and adhesion between the glue and the membrane are produced.
- the connection strength expands the selection range of adhesives
- the PTFE-based nano-functional composite film prepared by the present invention has excellent ultraviolet resistance and weather resistance of PTFE material, which is equivalent to the protective coat of the blade, can enhance the surface strength of the blade, play an integral fixing role, and improve the overall bearing capacity of the blade and The ability to resist erosion, eliminate hidden dangers such as blade aging and cracking, and thus improve the service life of fan blades.
- Fig. 1 is the surface of the film before the treatment of the nano-depth active structure layer on the film surface under the scanning electron microscope SEM;
- Figure 2 shows the surface of the membrane after treatment with a nano-depth active structure layer on the membrane surface under the scanning electron microscope SEM.
- This embodiment provides a method for nano-depth surface activation of a PTFE-based membrane.
- the functional surface of a PTFE-based nano-functional composite membrane with nano-scale and micro-scale concave-convex geometric ultra-structure morphology is covered with a PE membrane.
- the single side of the film on which the adhesive is applied is subjected to surface activation treatment at a speed of 3 m/min in a vacuum environment and a nitrogen-hydrogen mixed medium atmosphere below 40 ° C, so that the sizing surface of the film has a nanometer depth.
- the high-toughness cold-bonding adhesive tape is migrated and compounded on the membrane surface with the activated structural layer based on the PTFE nano-functional composite membrane through the mechanical sizing device, so that the characteristic groups of the glue and the activated structural layer of the membrane are chemically bonded Co-action, the formation of a film complex.
- the high toughness cold adhesive is prepared as follows: PVA-1788 0.2kg, butyl acrylate 18kg, acrylic acid 0.5kg, vinyl acetate 1.0kg, methyl methacrylate 1.0kg, silicone monomer 1.5kg, TO- 7 0.01kg, 0.01kg of sodium dodecylbenzenesulfonate, 0.05kg of benzoyl peroxide, and 80kg of water were added to the preparation tank, the preparation temperature was 85°C, and the preparation time was 5h. After vacuuming and removing water, the solid content was obtained. It is a 18.7% tape-like pressure-sensitive adhesive tape, which is laminated on a release paper and then rolled on a PVC pipe core.
- the PTFE-based nano-functional composite membrane with nano-scale and micro-scale concave-convex geometric ultra-structure morphology is prepared according to the following steps:
- Infiltrate PTFE resin with silicone oil that softens PTFE mix vinyl silicone oil and PTFE resin in a mass ratio of 2.5:100, and blend the infiltrated PTFE resin.
- the passing temperature is 60 °C
- the speed is 25 m/min
- the pressure is 8MPa hot pre-pressing and hot pressing to obtain monomer-polymerized PTFE rods of ⁇ 17mm, which have surface lubricity at the same time;
- the prepared PTFE rods are fused and polymerized under the action of hot calendering, the hot calendering temperature is 60°C, and the speed is 25/min.
- a PTFE-based nano-functional composite membrane with micron-scale pores is prepared and rolled into a roll;
- the fibrous structure after the film cracking occurs after the layered exfoliation, resulting in a PTFE-based membrane with a nano-scale and micro-scale nano-scale and micro-scale geometric ultra-structured morphology of micropores.
- the thickness of the PTFE membrane is 100um, and the membrane color is milky white;
- the micro-polymerization of the PTFE-based nano-functional composite membrane with micron-scale micro-concave-convex surface structure was completed in a degreasing oven by temperature action.
- the temperature in the degreasing oven was 200 ° C, and the infiltration was carried out in PTFE resin without being squeezed out by a hot calender.
- the monomer polymerized silicone oil undergoes a polymerization reaction under the action of temperature and is polymerized and consolidated in the PTFE resin to obtain a homogeneous film based on PTFE. ;
- the temperature in the high temperature and high line pressure micro-eutectic cavity is set to 380 °C, and the nano-functional composite membrane based on PTFE is pushed forward at a speed of 6m/min.
- the high temperature in the cavity makes the membrane molecular chain shrink and generate eutectic, and the micropores become nanometers.
- Micron and ultra-micron size control the surface line pressure of PTFE membrane to 60N/m, make the membrane from milky white to transparent color with uniform transparency, density 2.1kg/m 3 , maintain the original nano-scale and Micron-sized concave-convex geometry-like ultrastructural morphologies.
- the PTFE material itself has the property of being able to be directly bonded without any bonding material, and for the PTFE-based nano-functional composite membrane that is used on the fan blade to prevent the blade from freezing in winter, in order to improve its ultra-low surface tension and non-adhesion. It has the characteristics of concave-convex geometric ultrastructure with nano-scale and micro-scale dimensions, and has high wear resistance through ultra-high temperature, ultra-high pressure and strong micro-eutectic. , wear toughness and film structure strength and high transparency, it is more difficult to obtain suitable adhesive for bonding and obtain good bonding performance. Therefore, it is necessary to perform nano-depth surface activation on the sizing surface based on PTFE nano-functional composite membrane.
- the PTFE-based nano-functional composite membrane prepared by the above scheme not only utilizes the lubricating and low surface tension properties of PTFE to achieve the purpose of non-adhesion, but also does not modify PTFE, and the membrane is prepared to have
- the nano- and micro-sized concave-convex geometric ultrastructure surface morphology makes the membrane more ultra-low surface solid tension, better hydrophobicity, higher non-adhesion and high antifouling property, and the membrane surface is self-cleaning at the same time function, which is unmatched by other measures.
- the PTFE-based nano-functional composite membrane obtained by ultra-high temperature and high pressure has high wear resistance, wear toughness and impact resistance, and is more resistant to the friction, impact and lightning of sand, hail, freezing rain, rain erosion and lightning.
- the impact capability of the arc enables it to be used for a long time at a linear speed of 300km/h on the tip of the fan blade without being worn, and at the same time, it has the characteristics of non-combustibility and will not cause combustion due to lightning arcs.
- the present invention conducts nanometer depth surface activation based on PTFE membrane
- the prepared PTFE nanometer functional composite membrane has ultra-low surface tension, anti-adhesion, anti-fouling, hydrophobicity, anti-hygroscopicity, Self-cleaning function; ultra-high wear resistance and wear toughness, with wear resistance, impact resistance, rain erosion resistance; extremely chemical corrosion resistance, corrosion resistance, high and low temperature resistance, aging resistance, chemical resistance, Ultraviolet resistance and fatigue resistance, enhance the surface strength of the fan blade, play an overall fixing role, improve the overall bearing capacity and erosion resistance of the blade, eliminate hidden safety hazards such as blade aging and cracking, enhance the blade's resistance to long-term erosion of foreign objects, and make the blade resistant to long-term erosion.
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Abstract
Description
Claims (5)
- 一种对基于PTFE膜进行纳米深度表面活化的方法,其特征在于:将具有纳米级和微米级尺寸凹凸几何状超微结构形貌的基于PTFE纳米功能复合膜功能面进行覆盖处理后,使施加粘接胶的膜单面在真空环境下且低于40℃的氮氢混合介质氛围中,以1.5~3m/min的速度进行表面活化处理,使膜的施胶面产生具有纳米深度的活化结构层;通过机械施胶装置将高韧性冷粘接胶胶带迁移复合在基于PTFE纳米功能复合膜具有了活化结构层的膜面上,使胶的特性基团与膜的活化结构层发生化学键合作用,形成了胶膜复合体;其中,高韧性冷粘接胶制备如下:将PVA-1788 0.2kg、丙烯酸丁酯18kg、丙烯酸0.5kg、乙酸乙烯酯1.0kg、甲基丙烯酸甲酯1.0kg、有机硅单体1.5kg、TO-7 0.01kg、十二烷基苯磺酸钠0.01kg、过氧化苯甲酰0.05kg、水80kg加入制备罐中,制备温度85℃,制备时间5h,抽真空和除水后,制得固含量为18.7%的胶带状压敏胶带,复合上离型纸后卷取在PVC管芯上。
- 根据权利要求1所述的一种对基于PTFE膜进行纳米深度表面活化的方法,其特征在于:基于PTFE纳米功能复合膜功能面用PE膜进行覆盖处理。
- 根据权利要求1所述的一种对基于PTFE膜进行纳米深度表面活化的方法,其特征在于:具有纳米级和微米级尺寸凹凸几何状超微结构形貌的基于PTFE纳米功能复合膜按如下步骤制备:(1)单体融合聚合与微量聚合制得基于PTFE纳米功能复合膜1)共混、预压、推压制棒用具有软化PTFE作用的硅油浸润PTFE树脂,对浸润后的PTFE树脂进行共混,通过温度为60~90℃,速度为20~30m/min,压力为5~8MPa的热预压、热推压,制得单体聚合PTFE棒料,同时具有表面润滑性;2)热压延融合聚合制膜将制备的PTFE棒料在热压延作用下进行融合聚合,热压延温度60~ 90℃,速度20~30/min,在温度作用下,掺在PTFE树脂中具有单体聚合作用的硅油被热压延机挤出,制得具有微米级孔隙的基于PTFE纳米功能复合膜,卷取成卷;在温度和热压延的拉伸作用下,膜裂后发生层状剥离后的纤维状结构,生成具有微孔隙的纳米级和微米级尺寸的凹凸几何状超微结构形貌的基于PTFE膜,基于PTFE膜的厚度为100~120um,膜颜色呈乳白色;3)微量聚合制成同均质膜将具有微米级微形凹凸表面结构的基于PTFE纳米功能复合膜在除油烘箱内通过温度作用完成微量聚合,除油烘箱内温度180~200℃,未被热压延机挤干净的浸润在PTFE树脂中进行单体聚合的硅油通过温度作用发生聚合反应而聚合固结在PTFE树脂内,制得基于PTFE同均质膜,成卷状的基于PTFE膜在除油烘箱内以6~8m/min的速度进行卷取;(2)高温高线压力微共晶制备基于PTFE纳米功能复合膜高温高线压力微共晶腔体内温度设定为70~420℃,基于PTFE纳米功能复合膜以6~8m/min速度向前推送,利用腔体内高温使膜分子链收缩并产生共晶,微孔隙变成纳米级和超微米级尺寸,控制PTFE膜表面线压力50~80N/m,使膜由乳白色成为透明色且透明度均匀一致,保持了基于PTFE纳米功能复合膜原有的纳米级和微米级尺寸的凹凸几何状超微结构形貌。
- 根据权利要求3所述的一种对基于PTFE膜进行纳米深度表面活化的方法,其特征在于:乙烯基硅油与PTFE树脂按质量比(2~3):100掺入。
- 根据权利要求4所述的一种对基于PTFE膜进行纳米深度表面活化的方法,其特征在于:具有纳米级和微米级尺寸凹凸几何状超微结构形貌的基于PTFE纳米功能复合膜按如下步骤制备:(1)单体融合聚合与微量聚合制得基于PTFE纳米功能复合膜1)共混、预压、推压制棒用具有软化PTFE作用的硅油浸润PTFE树脂,乙烯基硅油与PTFE树脂按质量比2.5:100掺入,对浸润后的PTFE树脂进行共混,通过温度为60℃,速度为25m/min,压力为8MPa的热预压、热推压,制得单体聚合的Ф17mm的PTFE棒料,同时具有表面润滑性;2)热压延融合聚合制膜将制备的PTFE棒料在热压延作用下进行融合聚合,热压延温度60℃,速度25/min,在温度作用下,掺在PTFE树脂中具有单体聚合作用的硅油被热压延机挤出,制得具有微米级孔隙的基于PTFE纳米功能复合膜,卷取成卷;在温度和热压延的拉伸作用下,膜裂后发生层状剥离后的纤维状结构,生成具有微孔隙的纳米级和微米级尺寸的凹凸几何状超微结构形貌的基于PTFE膜,基于PTFE膜的厚度为100um,膜颜色呈乳白色;3)微量聚合制成同均质膜将具有微米级微形凹凸表面结构的基于PTFE纳米功能复合膜在除油烘箱内通过温度作用完成微量聚合,除油烘箱内温度200℃,未被热压延机挤干净的浸润在PTFE树脂中进行单体聚合的硅油通过温度作用发生聚合反应而聚合固结在PTFE树脂内,制得基于PTFE同均质膜,成卷状的基于PTFE膜在除油烘箱内以6m/min的速度进行卷取;(2)高温高线压力微共晶制备基于PTFE纳米功能复合膜高温高线压力微共晶腔体内温度设定为380℃,基于PTFE纳米功能复合膜以6m/min速度向前推送,利用腔体内高温使膜分子链收缩并产生共晶,微孔隙变成纳米级和超微米级尺寸,控制PTFE膜表面线压力50~80N/m,使膜由乳白色成为透明色且透明度均匀一致,密度2.1kg/m 3,保持了基于PTFE纳米功能复合膜原有的纳米级和微米级尺寸的凹凸几何状超微结构形貌。
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ES202290056A ES2957007A1 (es) | 2020-11-05 | 2020-12-15 | Procedimiento para la activacion superficial a profundidad nanometrica de la membrana a base de ptfe |
DE112020005283.4T DE112020005283T5 (de) | 2020-11-05 | 2020-12-15 | Verfahren zur Oberflächenaktivierung in Nanotiefe auf der Basis einer PTFE-Membran |
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JP7426037B2 (ja) | 2024-02-01 |
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GB202208496D0 (en) | 2022-07-27 |
CA3161523C (en) | 2023-08-29 |
CN112500593B (zh) | 2021-07-06 |
DE112020005283T5 (de) | 2022-08-11 |
ES2957007A1 (es) | 2024-01-08 |
CA3161523A1 (en) | 2022-01-20 |
GB2606082A (en) | 2022-10-26 |
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