Abstract: The present invention provides a biomimetic agent for anti-biofouling networks and application thereof. The antibiofouling networks have a mole mass ratio of poly(vinylpyrolidone) to poly(sulfobetaine methacrylate) in a range of 70/30˜42/58 and are derived from a copolymer comprises poly(vinylpyrolidone)-block-poly(sulfobetaine methacrylate), poly(vinylpyrolidone)-random-poly(sulfobetaine methacrylate) and poly(vinylpyrolidone)-alternating-poly(sulfobetaine methacrylate).

Abstract: This invention is about a method for fabricating carbon molecular sieve membrane. The above method comprises a step of deposition, and a step of carbonization to obtain a high performance and high selectivity carbon molecular sieve membrane. According to this invention, an ultra-thin and defects free carbon molecular sieve membrane can be obtained. More preferably, the method for fabricating carbon molecular sieve membrane of this invention is easy operating, economic, and environmental friendly.

Abstract: The present invention discloses a semicrystalline polymer/graphene oxide composite film, comprising: a first semicrystalline-typed polymer, distributed in structural space of the composite film and having a porous structure; and graphene oxide, having a layered structure and distributed in the composite film wherein gas passage exist between adjacent layered structures, the first semicrystalline-typed polymer existing between part of adjacent layered structures forms into a second semicrystalline-typed polymer by further heat treatment after the first semicrystalline-typed polymer and graphene oxide are blended uniformly to be distributed in the composite film so as to fill and seal a portion of the porous structure to block gas from flowing to extend path length(s) of gas passage; wherein graphene oxide existing between the first semicrystalline-typed polymers induces formation of the second semicrystalline-typed polymer.

Abstract: The invention provides a graphene derivative composite membrane and method for fabricating the same. The graphene derivative composite membrane comprises a support membrane made of porous polymer and a plurality of graphene derivative layers disposed on the support membrane wherein the distance between adjacent graphene derivative layers is about 0.3˜1.5 nm and the total thickness of the plurality of graphene derivative layers is more than 100 nm.

Abstract: The present invention provides a biomimetic agent for anti-fouling coating and a method for making the same. The biomimetic agent comprises a block, random, or alternating copolymer having a general formula (1): AUnBUm, where AU represents a repeating unit comprising an anchoring moiety, BU represents a repeating unit comprising a zwitterionic moiety or a pseudo-zwitterionic moiety, m is an integer of 5˜120 and n is an integer of 5˜120.

Abstract: The present invention discloses a silica-like membrane for separating gas, which is modified from poly(dimethylsiloxane) (PDMS) membrane by an atmospheric pressure high temperature plasma torch (APHTPT). Furthermore, the present invention of the separating gas silica-like membrane with an inorganic/organic interface structure which has both the gas flux of the organic membrane and also the gas selectivity of the inorganic membrane.

Abstract: The present invention discloses a method for characterizing a membrane in a wet condition using a positron annihilation spectrometer and a sample holder thereof. Positron annihilation lifetime spectroscopy (PALS) has been know to be an invaluable tool for investigating local free-volume hole properties in various materials. Accompanying with the method and sample holder disclosed by the invention, PAS and PALS can measure the properties of various materials, such as free volume and layer structures both in the dry and wet states.

Abstract: The present invention discloses a method for characterizing a membrane in a wet condition using a positron annihilation spectrometer and a sample holder thereof. Positron annihilation lifetime spectroscopy (PALS) has been know to be an invaluable tool for investigating local free-volume hole properties in various materials. Accompanying with the method and sample holder disclosed by the invention, PAS and PALS can measure the properties of various materials, such as free volume and layer structures both in the dry and wet states.

Abstract: The present invention discloses an adjustable film applicator which comprises an applicator body, a first knife, a second knife, a first fixing apparatus, a second fixing apparatus, a pair of first adjusting screws, and a pair of second adjusting screws. The first and second knife are adjusted to a first and second height by adjusting the first and second adjusting screws, wherein the second height is greater than the first height.

Abstract: The present invention discloses an adjustable film applicator which comprises an applicator body, a first knife, a second knife, a first fixing apparatus, a second fixing apparatus, a pair of first adjusting screws, and a pair of second adjusting screws. The first and second knife are adjusted to a first and second height by adjusting the first and second adjusting screws, wherein the second height is greater than the first height.

Abstract: The present invention discloses discloses a composite PTFE membrane comprising an expanded PTFE membrane as substrate and a sintered porous PTFE membrane on top of it. The porous PTFE membrane on top has porous structure with interconnected channels formed with a sintering process that fuses the PTFE fine powders coated on the ePTFE membrane. Furthermore, the present invention discloses a method for forming the composite PTFE membrane.

Abstract: The present invention provides an asymmetric porous PTFE membrane for a filter having little change over time and conventionally known properties of a porous PTFE molded article such as water permeability resistance, air permeability, sealing properties and electric properties, in which collection efficiency, air permeability and pressure loss are improved. Specifically, the present invention relates to an asymmetric porous PTFE membrane for a filter comprising a dense skin layer and a continuously foamed porous layer, wherein (1) the contact angle of water to the surface of the skin layer is 120 to 140°; and (2) the diffuse reflectance of light is 91 to 94%.

Abstract: The present invention provides an asymmetric porous PTFE membrane for clothing having little change over time and conventionally known properties of a porous PTFE molded article such as water permeability resistance, air permeability, sealing properties and electric properties, in which durability and water vapor permeability are improved by strengthening adhesion strength with fabric. Specifically, the present invention relates to an asymmetric porous PTFE membrane for clothing comprising a dense skin layer and a continuously foamed porous layer, wherein (1) the contact angle of water to the surface of the skin layer is 120 to 140°; and (2) the diffuse reflectance of light of the skin layer is 91 to 94%.

Abstract: The present invention discloses a method for modificating a fluoropolymer. First, a fluoropolymer is provided, and then a hydrogen plasma treatment is performed on the fluoropolymer, so that C—H group is introduced to the surface of the fluoropolymer to form an intermediate. Next, an ozone treatment is performed on the intermediate, wherein the C—H group serves as ozone accessible site to form peroxide, and a first modified fluoropolymer is then formed. Finally, a grafting polymerization is initiated from the peroxide of the first modified fluoropolymer in the presence of a composition comprising at least one functional monomer, so as to form a second modified fluoropolymer. Furthermore, this invention also discloses methods for fabricating metal-clad laminates.

Abstract: The present invention discloses discloses a composite PTFE membrane comprising an expanded PTFE membrane as substrate and a sintered porous PTFE membrane on top of it. The porous PTFE membrane on top has porous structure with interconnected channels formed with a sintering process that fuses the PTFE fine powders coated on the ePTFE membrane. Furthermore, the present invention discloses a method for forming the composite PTFE membrane.

Abstract: A chitosan membrane containing nanosize particles is disclosed in this invention. The chitosan membrane comprises a chitosan membrane and nano-inorganic particles. The nano-inorganic particles are uniformly embedded in the chitosan membrane. This invention also discloses a method for forming a chitosan membrane containing nanosize particles. The method comprises a grinding process, a dissolution process, a dispersion process, a blending process, an impurity removing process, a degassing process, a casting process, and a fixation process.

Abstract: The present invention relates to an asymmetric porous polytetrafluoroethylene membrane comprising a dense skin layer and a continuously foamed porous layer, (1) the dense skin layer having a surface roughness Ra of 20 to 165 nm; (2) the dense skin layer having a contact angle for water of 120 to 135°; (3) the porous layer having a maximum pore diameter of 0.03 to 1.0 ?m; and (4) the membrane having a total porosity of 20 to 70%. The asymmetric porous PTFE membrane has an ability to separate each liquid component from a liquid-liquid homogeneous mixture in addition to known properties such as water permeability resistance, gas permeability, sealing property and electric property, wherein change of these properties over time is small.

Abstract: The present invention provides an asymmetric porous PTFE membrane for clothing having little change over time and conventionally known properties of a porous PTFE molded article such as water permeability resistance, air permeability, sealing properties and electric properties, in which durability and water vapor permeability are improved by strengthening adhesion strength with fabric.

Abstract: The present invention provides an asymmetric porous PTFE membrane for a filter having little change over time and conventionally known properties of a porous PTFE molded article such as water permeability resistance, air permeability, sealing properties and electric properties, in which collection efficiency, air permeability and pressure loss are improved.

Abstract: The present invention relates to an asymmetric porous polytetrafluoroethylene membrane comprising a dense skin layer and a continuously foamed porous layer, (1) the dense skin layer having a surface roughness Ra of 20 to 165 nm; (2) the dense skin layer having a contact angle for water of 120 to 135°; (3) the porous layer having a maximum pore diameter of 0.03 to 1.0 &mgr;m; and (4) the membrane having a total porosity of 20 to 70%. The asymmetric porous PTFE membrane has an ability to separate each liquid component from a liquid-liquid homogeneous mixture in addition to known properties such as water permeability resistance, gas permeability, sealing property and electric property, wherein change of these properties over time is small.