372 results about "Surface energy" patented technology

The invention relates to the technical field of high polymer material processing, in particular to a blow molding method of a composite toughened film, which comprises the following steps: step 1, preheating matrix resin in preheating equipment; 2, feeding the mixed raw materials into a double-screw extruder for melt blending; 3, feeding the dried composite particles into a hopper of a single-screw blow molding extruder; 4, adjusting the air volume and the air pressure of the cooling system according to the monitoring result; and 5, the formed film pipe is folded into a flat shape through a guide component and led out through a traction roller, the traction speed and the extrusion speed are coordinated to control the traction ratio, corona treatment is conducted on the surface of the thin film to improve the surface energy, then rolling tension is controlled for rolling, and the rolling tension is controlled according to the elasticity and thickness of the thin film to prevent excessive stretching or loosening. The uniform distribution and proper compatibility of the composite toughening component improve the toughness of the film, and maintain the strength and barrier property of the film.

The invention relates to a long-life room-temperature phosphorescent material and a preparation method and application thereof.According to the phosphorescent material, epoxy resin is doped with an epoxy prepolymer containing a fluorine-containing chain segment to serve as a host matrix, F-pi and pi-pi non-covalent synergistic interaction is formed between the host matrix and aromatic fluorescent guest molecules, the energy level difference of the excited state is adjusted, and the phosphorescent material is obtained. Intersystem crossing (ISC) and radiative transition rates are optimized, so that the phosphorescence lifetime and environmental adaptability are improved; a fluorine-containing chain segment introduced into a polymer system can be enriched on the surface of a material to form a needle-shaped structure, so that the surface energy of the material is remarkably reduced, the antifouling property is excellent, and additional functions of lyophobicity, transparency, chemical stability and the like are also realized while ultra-long room-temperature phosphorescence is realized; and cooperative enhancement and multifunctional integration of optical performance and surface performance are realized.

The invention discloses a water-based single-component super-amphiphobic refrigeration coating, a coating and a preparation method of the coating, and relates to the technical field of coatings. 20-35 parts of a second filler; 5-10 parts of a third filler; 20-35 parts of a film-forming substance, 1-9 parts of an auxiliary agent and 3-50 parts of water; the first filler comprises fluorine-containing silane modified fumed silica; the second filler comprises at least one of long-chain silane modified precipitated barium sulfate, long-chain silane modified calcium carbonate and long-chain silane modified hollow glass beads; the third filler comprises an infrared emission filler treated by an organic silicon modifier. By modifying the filler, the purposes of stable dispersion and functional synergy of low-surface-energy substances and high-proportion inorganic nano filler in a water-based system are achieved.

The invention relates to the technical field of intelligent sensing systems, in particular to an algorithm and system for avoiding water surface floating objects and improving monitoring precision based on radar water level monitoring, and the method comprises the following steps: collecting radar echoes, constructing spatial-temporal characteristics based on waveform asymmetry and coherent attenuation gradient, and calculating the spatial-temporal characteristics; according to the method, the central moments of the front edge and the rear edge of the echo are calculated, the waveform asymmetry is quantified, the dynamic stability is analyzed in combination with the attenuation gradient of the multi-time-lag coherence coefficient, the floating object interference is recognized from the double dimensions of the spatial form and the time memorability, and the actual water level is inverted. An effective scattering trailing interval is positioned, nonlinear approximation operation is performed on trailing data in combination with an index physical model, a shielded water surface energy distribution curve is reconstructed, a derivative zero point is solved, distance measurement deviation caused by floating objects is corrected, the real water level height is effectively restored, and the monitoring anti-interference capability and the data accuracy in a complex hydrological environment are improved.

The invention relates to a method for constructing a composite super-hydrophobic coating through double bonding. The preparation method comprises the following steps: taking a clean copper sheet which is not pretreated as a substrate, dipping the copper sheet in a suspension consisting of nanoparticles and sulfydryl-containing siloxane ethanol, taking out, washing, drying, dipping in a perfluoromercaptan ethanol solution, taking out, washing, and drying to obtain the copper-based super-hydrophobic surface coating. The coating prepared by the method has excellent super-hydrophobicity, icing resistance and stability. Different from an existing conventional preparation method, the method has the advantages that pretreatment operation such as abrasive paper polishing, strong acid etching or anodic oxidation does not need to be carried out on a copper sheet, and micro-nano roughening and low-surface-energy self-assembly can be completed on the copper surface only through two-step normal-temperature dipping. The method is simple in preparation process, mild in condition, free of expensive equipment, thin in coating thickness and small in influence on electric conduction and heat conduction of the copper substrate, intrinsic performance of copper can be reserved, the electric conduction / heat conduction characteristic of the copper substrate is considered, and the method has wide application value and prospects.

The invention discloses a high-wear-resistance modified polypropylene material and a preparation process thereof. The material comprises the following components in parts by weight: isotactic polypropylene, a beta nucleating agent, a heterofunctional hexagonal boron nitride nanosheet, an elastomer, an antioxidant system and a surface migration accelerant, one side of the nanosheet is treated by amino silane, and the other side of the nanosheet is treated by fluorine-containing silane. The material is prepared through twin-screw melt blending granulation and injection molding, in the molding process, variable mold temperature is adopted, contact pressure is applied to the surface of a product to promote directional migration and orientation of nanosheets in a cortex area, and then annealing is conducted. The Janus structure and the surface migration accelerant cooperate to realize a fluorine-containing low-surface-energy self-lubricating surface layer with an outward surface; the beta nucleating agent induces beta crystal formation to improve toughness. The scheme has the advantages of simple process and easily available raw materials, and is suitable for polypropylene products with higher wear resistance requirements, such as automotive interiors and household appliance shells.

The invention belongs to the technical field of tempered glass preparation, and particularly relates to impact-resistant self-cleaning tempered glass and a preparation method thereof. Epoxy acrylate, a repairing agent, an oil-phase solvent, a photoinitiator, polyvinyl alcohol and an acrylamide sulfonic acid derivative are adopted as raw materials, a self-repairing microcapsule is obtained through mixing, emulsification and UV polymerization, a hydrophobic modified microcapsule is obtained through modification of aluminum phosphate and a low-surface-energy substance, the hydrophobic modified microcapsule is mixed with water-borne epoxy resin to obtain a coating mixed solution, the coating mixed solution is applied to the surface of glass, and the surface of the glass is coated with the self-repairing microcapsule. And drying and cooling to obtain the toughened glass with the coating. The toughened glass has good impact resistance, self-repairing performance and self-cleaning performance.

The application discloses a composite current collector based on a PP-based film / PET-based film and a production process, which comprises the following steps: S1, base film pretreatment; S2, physical modification treatment; S3, double-layer intermediate transition layer preparation; and S4, metal layer preparation. The physical modification constructs a micro-nano rough structure on the surface of the base film through plasma etching, removes impurities in a weak boundary layer, increases the contact area by 3-5 times, provides a basis for the mechanical occlusion of the transition layer and the metal layer, and introduces a small amount of oxygen-containing polar groups to preliminarily increase the surface energy; and the transition layer is a composite structure of a silane coupling agent and a Cr layer, is combined with the polar groups of the base film through Si-O-C covalent bonds, is connected with the coupling agent and the Cr layer through Cr-N coordination bonds, and is embedded into rough pits through Cr atoms to form a dual action of mechanical anchoring and chemical bridging, so that the peeling strength of the metal layer and the base film is greatly increased through the cooperation of the two, and the mechanical requirement of long-term cycling of a lithium battery is met.

The invention discloses high-dispersion polyhedral nano silver powder as well as a preparation method and application thereof, and belongs to the technical field of preparation of electronic materials and nano powder. The problems that an existing polyhedral nano silver powder preparation method is difficult in morphology control and poor in dispersity, uses toxic reagents and the like are solved. According to the method, the growth process of the nano-silver crystal faces in a triethylene glycol system is regulated and controlled by means of high adsorption capacity and coordination of high-valence metal ions, the high-valence metal ions are selectively adsorbed on different crystal faces of silver, the surface energy and the growth rate of each crystal face are changed, and therefore control over the polyhedral morphology of the nano-silver powder is achieved. Besides, due to the fact that different high-valence metal ions are different in radius, charge number and adsorption capacity, the different high-valence metal ions have different regulation and control effects on the silver crystal face, and then controllable preparation of the polyhedral nano silver powder is achieved by selecting the different high-valence metal ions.

The invention belongs to the field of new materials, and particularly relates to a super-hydrophobic composite coating with mechanical firmness, self-cleaning property and high wear resistance, a method and application thereof. According to the preparation method, epoxy resin (E51) is adopted as a binder, quartz sand, modified F-TiO nano particles and SiO nano particles are combined, and the quartz sand / F-TiO / SiO coated EP super-hydrophobic composite coating of a double-layer structure is prepared through a simple and convenient blade coating-spraying process. According to the coating, through multi-scale hierarchical structure design and low surface energy modification, a static water contact angle of 151 degrees and 1t are achieved; the rolling angle of 5 degrees shows excellent self-cleaning performance on liquid and solid pollutants. A mechanical stability test shows that in a Taber abrasion test, the coating still keeps good hydrophobicity after being abraded for 3000 cycles under the load of 250 g and abraded for 600 cycles under the load of 750 g; after 500 times of adhesive tape stripping experiments, the static water contact angle is still greater than 120 degrees, the rolling angle is as low as 5 degrees, and excellent wear resistance and substrate adhesion are shown.

The invention relates to the technical field of model construction, in particular to a displacement fluid and shale rock imbibition law numerical simulation method and system. According to the method, by quantitatively analyzing the linear correlation degree of granularity and experimental capillary constant distribution and the disturbance degree of local feature points, regularization parameters of a regression algorithm are dynamically adjusted, and on the basis of accurately-calibrated capillary constants, a contact angle is determined by combining permeability characteristic data of probe liquid, so that the permeability of the probe liquid is determined. According to the method, shale surface free energy is obtained through surface energy component theoretical model decoupling, the interface action state of displacement fluid, shale and crude oil is reflected through a three-phase contact angle determined through a three-phase equilibrium relation, and the adhesion work needed by shale oil stripping is obtained. According to the method, the high-precision fitting model of the granularity and the capillary constant is established, and the surface energy component theory is combined, so that more accurate calculation of the shale oil stripping adhesion work is realized, and a reliable numerical simulation basis is provided for improving the shale oil recovery ratio.

The invention discloses a high-adhesion composite aluminum film and a preparation method thereof, and belongs to the technical field of composite thin films, and the high-adhesion composite aluminum film comprises a substrate layer, a barium titanate coating formed on at least one surface layer of the substrate layer, and a metal aluminum layer formed on the surface of the barium titanate coating. By adopting the barium titanate coating, the surface energy is higher, the wettability of the deposited aluminum layer on the surface of the barium titanate coating is better, the uniform and compact coating tightly combined with the substrate can be obtained, the barium titanate nanoparticles form a microscopic coarse structure on the surface of the substrate, and the deposited aluminum layer is embedded into or wraps the structure; the mechanical binding force between the aluminum film and the substrate is remarkably increased through the physical anchoring effect.

The present application relates to the technical field of micro-nano functional materials, and particularly relates to a high-efficiency light-heat conversion and wear-resistant super-hydrophobic coating, a preparation method thereof and an application thereof in ice prevention and removal, the preparation method adopts ammonium persulfate as an oxidant to initiate polymerization of pyrrole on the surface of halloysite nanotubes to generate polypyrrole, so as to obtain a halloysite nanotube composite material wrapped by polypyrrole. The super-hydrophobic coating is obtained by mixing the composite material with low-surface-energy polydimethylsiloxane, and the coating layer formed by the super-hydrophobic coating has the characteristics of high roughness and low surface energy, and thus has excellent hydrophobic performance. The coating layer also has good light-heat effect, flexibility, elasticity, mechanical performance, high-temperature resistance and durability. In addition, by adding hydrophobic nano-SiO2, the super-hydrophobic performance of the coating layer is further improved, and the hardness and wear resistance of the coating layer are also enhanced. Finally, the coating layer has excellent light absorption capacity and light-heat conversion efficiency, and realizes the performance of efficient protection and ice layer removal in the application of ice prevention and removal.

The invention discloses an iodine working medium storage tank with a bionic anti-adhesion inner wall, belongs to the technical field of spaceflight electric propulsion, and solves the problems that in the prior art, a smooth inner wall provides the maximum contact area for a corrosion medium, adhesion and accumulation of corrosion products cannot be actively prevented, and the protection dimension is single. The iodine working medium storage tank comprises a storage tank body, a bionic micro-nano composite structure and a corrosion-resistant functional coating, according to the invention, the bionic micro-nano composite structure formed by the micron-scale bulge array and the nano-scale texture is sequentially arranged on the inner surface of the metal matrix, and then the corrosion-resistant functional coating is deposited, so that the corrosion resistance is improved from physical and chemical two dimensions; according to the bionic micro-nano composite structure, the contact between a corrosion medium and the inner wall is changed into point contact under the bionic micro-nano structure from surface contact of a traditional smooth surface, the real contact area between the corrosion medium and the inner wall of the metal matrix is effectively reduced, meanwhile, the surface energy is remarkably reduced, and the inner wall has the excellent lyophobic characteristic.

The application discloses a graphene super-hydrophobic corrosion-resistant composite coating and a preparation method and application thereof, and comprises the following steps: S1, graphene material and hydrochloric acid dopamine are dissolved in water, and ultrasonic treatment is carried out in a weak alkali environment; S2, fluorosilane is dissolved in ethanol and then added to the solution after ultrasonic treatment in S1, continuous stirring is carried out at a first temperature, then the temperature is increased to a second temperature, continuous stirring is carried out, then cooling, filtering and drying are carried out to obtain a composite filler; S3, the composite filler obtained in S2 is ultrasonically dispersed in a solvent, PDMS and a curing agent are added and stirred, and a coating is obtained after ultrasonic treatment; and S4, the coating prepared in S3 is coated on the surface of a metal substrate, curing is carried out, and a graphene super-hydrophobic corrosion-resistant composite coating is obtained. The composite coating prepared by the application can inhibit the "corrosion promotion activity" of graphene, has excellent corrosion inhibition performance, and can achieve super-hydrophobicity by cross-linking with PDMS having low surface energy, and simultaneously has excellent self-cleaning performance.

The invention provides a preparation method and a preparation device of a nano-film. The preparation method of the nano-film comprises the following steps: preparing a coating solution; a scraper is provided and comprises a scraper base body and a silk screen at least wrapping the surface of the blade portion of the scraper base body, the mesh number of the silk screen is larger than or equal to 100, and the surface energy of the scraper base body and the surface energy of the silk screen are both larger than the surface tension of the coating solution; a to-be-coated substrate is provided, and the silk screen on the surface of the blade part is controlled to make contact with the to-be-coated substrate; in the coating direction, the included angle between the scraper and the substrate to be coated is larger than 0 degree and smaller than 180 degrees; continuously dropwise adding the coating solution to the silk screen, controlling the scraper and the to-be-coated substrate to move relatively along the coating direction, and obtaining a liquid film on the surface of the to-be-coated substrate; and curing the liquid film to form the nano film. According to the method, the vertical liquid film is utilized, the lifting speed of the scraper and / or the substrate to be coated and the viscosity and surface tension of the coating solution are adjusted, and the thickness of the liquid film is accurately controlled to be 500 nm or below.

The invention relates to an ultraviolet analyzer for detecting sports diet finished products, which is characterized in that a lower liquid level table and an upper liquid level table are arranged on a base unit, and a to-be-detected fluid sample forms a liquid bridge between the lower liquid level table and the upper liquid level table; the surface energy anchoring structure is used for forcibly limiting a solid-liquid contact line of a to-be-detected fluid sample in a preset optical path light passing area; the liquid bridge impedance feedback loop is used for forming a closed loop through a liquid bridge in the liquid bridge stretching process so as to monitor the equivalent complex impedance value of the liquid bridge in real time; in the process that the driving unit drives the lifting detection head to stretch the liquid bridge, the stretching speed of the driving unit is adjusted in real time according to the complex impedance change rate fed back by the impedance analysis module; and the optical fiber spectrum detection unit is triggered to carry out spectrum acquisition at a plurality of different stretching heights when the liquid bridge maintains a continuous state. According to the invention, high-precision detection can be realized without physical dilution, and continuous spectrum data under a group of optical program columns can be obtained through single sample loading.

The present application belongs to the technical field of self-repairing coating, and relates to a preparation method of a green photo-thermal super-hydrophobic self-repairing coating. The preparation method specifically comprises the following steps: step 1, polydopamine coating carbon black; step 2, carbon black silane modification; step 3, hybrid wall microcapsule preparation; step 4, silanized carbon black branch connection microcapsule; and step 5, mixed spraying. The present application synthesizes non-fluorinated low-surface-energy particles, adopts non-fluorinated super-hydrophobic carbon black branch connection modification microcapsule to prepare a photo-thermal super-hydrophobic self-repairing coating, the use of the non-fluorinated coating reduces cost and protects the environment; and the nano-composite coating is composed of nano-particle fillers and an organic polymer resin coating. In the coating, the branch connection carbon black endows the coating with excellent photo-thermal conversion capability to realize the deicing function, at the same time, the rupture of the microcapsule realizes the release of the dehydrated castor oil core material, and realizes the self-repairing of the damaged area of the coating, and the hydrophobic modification layer of the carbon black and the hybrid structure of the microcapsule together guarantee the super-hydrophobicity and durability of the coating.

The invention provides application of droplet merging induced bounce and a solid surface energy measuring system and method, and belongs to the technical field of surface science and precision measurement. Firstly, the invention provides an application of a droplet combination induced bounce phenomenon in solid surface energy measurement. Secondly, the invention provides a measuring system which comprises a liquid drop distribution unit, a merging induction unit, a high-speed image acquisition unit and a data processing and analyzing unit. Finally, a measuring method is provided, two liquid drops with similar sizes are prepared on the surface of a solid, and the liquid drops are induced to be combined and bounce; relevant parameters are extracted, and a Young's equation contact angle of the smooth surface is obtained based on an energy conservation model and a Cassie-Baxter model; and the total surface energy of the super-hydrophobic solid is obtained by simultaneously solving dispersion and polar components of the surface of the super-hydrophobic solid by using data of at least two liquids. According to the method, the surface energy is measured by using liquid drops and bounce, and the defect of low-surface-energy material measurement by a traditional contact angle method is overcome.

The invention discloses an electric arc indication composition suitable for an insulator silicone rubber surface and a preparation method thereof, and belongs to the technical field of functional materials of electrical equipment. The composition comprises the following components in percentage by mass: 0.1-20% of main functional particles, 5-50% of a film-forming material, 60-80% of a solvent and 0-20% of an auxiliary agent, wherein the main functional particles are colored particles coated with Co3 (PO4) 2.8 H2O and ester materials or a combination of the Co3 (PO4) 2.8 H2O and the ester materials; according to the electric arc indicating composition, through the swelling effect of the solvent on the silicon rubber substrate and the synergistic reaction of all the components, the adhesive force and durability of the electric arc indicating composition on the low-surface-energy silicon rubber of the insulator are remarkably improved, and when an electric arc occurs on the surface of the insulator, generated local high temperature triggers the thermochromic combined material to generate irreversible color change; therefore, the position of arc generation can be recorded and indicated visually and permanently.

The invention discloses a preparation method of a durability self-reinforced transparent super-hydrophobic coating based on steel slag. The method comprises the following steps: firstly, co-dispersing steel slag micro powder and a one-dimensional / two-dimensional nano material (such as hydroxylated multi-walled carbon nanotubes, cellulose nanofibers and the like) in an alcohol solvent to form a suspension, and carrying out spraying and high-temperature heat treatment to construct a micro-nano rough porous substrate; then, a solution obtained after hydrolytic condensation of perfluoroalkyl silane is sprayed to the surface of a substrate, and hydrophobic modification is achieved after drying and curing. The coating with the micro-nano hierarchical structure is successfully prepared through the synergistic effect of the micro-nano structure of the steel slag and the low-surface-energy substance in combination with the optimized spraying and heat treatment process. The static water contact angle of the coating is gt; the angle is 150 degrees, and the sliding angle is 1t; the visible light transmittance is gt at 10 degrees; and moreover, the coating shows excellent mechanical wear resistance, environmental stability, self-cleaning property and anti-icing function. The method is simple in process and low in cost, realizes high value-added utilization of the industrial waste steel slag, and has wide application prospects in the fields of building glass, traffic equipment, solar panels and the like.

Compositions (e.g., coatings) containing fingerprint-inhibiting materials, as well as related articles, methods, and kits, are generally described. In some embodiments, a coating comprises a fingerprint-inhibiting material configured to reduce, inhibit, and / or prevent fingerprint adhesion on a surface to which the coating is applied. In some embodiments, the fingerprint-inhibiting properties of a coating (e.g., an anti-fingerprint coating) may be provided by a silane compound containing a polysiloxane that reduces the surface energy of the surface to which the coating is applied and makes the coating hydrophobic and / or oleophobic. According to some embodiments, in addition to providing fingerprint resistance, the coating may be chemically inert, mechanically robust, optically clear, and / or slippery.

The invention relates to an edge sealing adhesive tape for a photovoltaic module and the photovoltaic module packaged by the edge sealing adhesive tape. The photovoltaic module is provided with a front cover plate and a rear cover plate which are oppositely arranged, the edge sealing adhesive tape comprises a water blocking layer and an oxygen blocking layer tightly bonded with the water blocking layer, and the bonding strength between the water blocking layer and the front cover plate and the bonding strength between the water blocking layer and the rear cover plate are larger than 40 N / cm; the oxygen barrier layer comprises a core layer and auxiliary layers symmetrically adhered to the two sides of the core layer; the bonding strength between the surface of one side, deviating from the oxygen-resistant layer, of the water-resistant layer and the front cover plate and the rear cover plate is greater than 40N / cm; the surface energy of the surface of the side, away from the water-blocking layer, of the oxygen-blocking layer is smaller than 36 mN / m. Thus, the edge sealing adhesive tape forms three-dimensional protection on the photovoltaic module, water vapor and oxygen are prevented from entering the photovoltaic module, and the life cycle of the photovoltaic module adopting the edge sealing adhesive tape is prolonged.

The invention relates to a two-component epoxy low-surface-energy primer-topcoat paint which is composed of an agent A and an agent B. The agent A comprises the following components in parts by weight: 150 parts of epoxy resin; 50 to 100 parts of a low surface energy filler; 50-100 parts by volume of a filler; 10 to 20 parts of pigment; 1 to 5 parts of a polymethyl alkyl siloxane defoaming agent; 3-10 parts of a low surface energy auxiliary agent; 30-60 parts of an organic solvent; the agent B is an amine epoxy curing agent; when in use, the mixing weight ratio of the agent A to the agent B is 200: (10-20); in conclusion, the two-component epoxy low-surface-energy primer-topcoat paint provided by the invention can solve the problem that the adhesive force of a traditional coating is reduced due to enrichment of low-surface-energy components on a surface layer through epoxy resin compounding, gradient distribution design of the low-surface-energy components and synergistic filling of multi-stage fillers; the double functions of corrosion prevention and low surface energy can be achieved through single-pass coating, and the coating is suitable for high-altitude, offshore and other complex working conditions.

To produce an optical arrangement (10) comprising a first optical component (12) having a first surface (18) and a second optical component (14) having a second surface (20) integrally connected to the first surface (18) except for at least one gap region (16) having at least one gap between the first and second surfaces (18, 20), the first optical component (12) is provided, the first surface (18) of the first optical component (12) is surface treated in one or more predefined regions (22, 22a) of the first surface (18) to change a surface energy of the first surface (18) in said one or more predefined regions (22, 22a), the second optical component (14) is provided with the second surface (20) integrally connected to the first surface (18) of the first optical component (12) by means of direct contact or through a continuous layer of adhesive (24), and a pre-defined time is waited for creating the at least one gap region (16) having at least one gap between the first and second surfaces (18, 20) by delamination of a material of the second optical component (14) or the adhesive (24) from the first surface (18) in said one or more predefined regions (22, 22a)

The invention relates to a preparation method of a photocuring silicon-based release agent and a PET release liner, and belongs to the technical field of release liners.The preparation method comprises the steps that a prepolymer containing acrylate double bonds, modified carbon nanotubes containing double bonds, siloxane containing fluorine groups and a compound initiator are mixed and coated on the PET release liner for ultraviolet curing, and the photocuring silicon-based release agent is obtained. Amino silicon oil in the prepolymer can provide low surface energy, a long-chain structure of the amino silicon oil can form a uniform lubricating layer on the surface of the release film, the surface energy of the PET release film is reduced through cooperation of the amino silicon oil and fluorine-containing siloxane, efficient regulation and control of the surface energy are achieved from the molecular level, the intermolecular adsorption force with an adhered object is reduced, and the modified carbon nanotubes are added into a cross-linked network, so that the adhesion between the modified carbon nanotubes and the adhered object is reduced. The heat resistance of the PET release film can be further improved, meanwhile, the hydrophobic property of the PET release film can be enhanced by the fluorine chain segment and the silicone oil chain segment, the fluctuation of the release force of the PET release film in a high-temperature and high-humidity environment is reduced, and the use reliability of the PET release film is ensured.

A method for selectively filling, with a filling liquid, a first cavity from among a plurality of cavities, each cavity opening out at a front face of a substrate. The method includes a processing step for altering the surface energy of the first internal surface of the first cavity or the surface energy of the second internal surfaces of the other cavities, such that the first surface has a first surface energy and the second surfaces have a second surface energy, and a step including a sequence for spreading the filling liquid, the first energy and the second energy being adjusted such that the first and the second surfaces exert an attracting effect and a repelling effect, respectively, on the liquid.

The present invention provides a method for manufacturing a package substrate, the method for manufacturing a package substrate according to an embodiment of the present invention comprising: a preparation step of preparing a spare substrate including a core layer in which a cavity portion is formed, the cavity portion including an element portion mounting space and a cavity inner surface surrounding the element portion mounting space; a surface treatment step of improving the surface energy of at least one part of the inner side surface of the cavity; an element part mounting step of mounting an element part on the cavity part after the surface treatment step; and an encapsulation layer formation step of forming an encapsulation layer surrounding at least a part of the surface of the element part using an encapsulation layer preparation composition. In this case, defects that may occur in the process of forming the encapsulation layer and the insulating layer in the package substrate can be effectively suppressed.