Chung Yuan Christian University

Yeu Ming Tai Chemical Industrial Co., Ltd.

Kueir-Rarn Lee

Juin-Yih Lai

Da-Ming Wang

Jung-Tsai Chen

Chien-Chieh Hu

James Huang

William Chou

David Chou

Ruoh-Chyu Ruaan

Tian-Tsair Wu

Shu-Hsien Huang

Ywu-Jang Fu

Wei-Song Hung

Kuo-Lun Tung

Tien-Hsiang Hsueh

Yan-Ching Jean

Yue-Zhe Zhong

Se-Tsung Kao

Yung-Hsin Lee

Chia-Hao Lo

Shingjiang Jessie Lue

Juin-Yig Lai

Pei-Yun Kuo

Quan-Fu An

Yu-Huei Su

Shen-Chuan Lo

Manuel De Guzman

James Yeu Ming Tai Chemical Indus Co Ltd Huang

William Yeu Ming Tai Chemical Indu Co Ltd Chou

David Yeu Ming Tai Chemical Indus Co Ltd Chou

The invention provides a transparent gas barrier composite film and its preparation method. The transparent gas barrier composite film is formed by having polyvinyl alcohol, graphene oxide and a crosslinking agent undergo blending, crosslinking, film casting and isothermal crystallization processes where a weight ratio of graphene oxide to polyvinyl alcohol is 0.1 wt %, graphene oxide induces crystallization of polyvinyl alcohol to form a hybrid structure compose of polyvinyl alcohol crystals, graphene oxide and the crosslinking agent, crystallinity of polyvinyl alcohol is more than 30%, transmittance of the composite film is more than 85%, and the oxygen transmission rate of the composite film is less than 0.005 cc/m/day.

Transparent gas barrier composite film and its preparation method

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.

Method for fabricating a semicrystalline polymer / graphene oxide composite film

Semicrystalline polymer/graphene oxide composite film and method for fabricating the same

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.

Silica-like membrane for separating gas and the method for forming the same

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.

Method for characterizing a membrane in a wet condition by positron annihilation spectrometer and sample holder thereof

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.

Adjustable film applicator

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.

Composite membrane and method for forming the same

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

Asymmetric porous polytetrafluoroethylene membrane for a filter

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&#xb0;; and (2) the diffuse reflectance of light of the skin layer is 91 to 94%.

Asymmetric porous polytetrafluoroethylene membrane for clothing

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.

Chitosan membrane containing nano-inorganic particles and the method for forming the same

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&#xb0;; (3) the porous layer having a maximum pore diameter of 0.03 to 1.0 &#x3bc;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.

Asymmetric porous polytetrafluoroethylene membrane and process for preparing the same

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Chung-Li, Taiwan

Kueir-Rarn Lee