Browsing by Author "Arnusch, Christopher John"

Now showing 1 - 4 of 4
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    Antibiofilm and antimicrobial functional membrane spacer
    (2021-06-08) Arnusch, Christopher John; Singh, Swatantra Pratap; Sargunaraj, Franklin; Oren, Yoram; Tour, James Mitchell; Li, Yilun; Rice University; B.G. Negev Technologies and Applications Ltd., at Ben-Gurion University; United States Patent and Trademark Office
    Disclosed herein methods for combating biofouling in a liquid, e.g. an aqueous medium by providing a surface coated with at least one laser-induced graphene (LIG) layer in said liquid medium. Particularly disclosed herein method and devices for treating water comprising passing a water stream through a membrane module equipped with at least one spacer coated with at least one layer of LIG, and optionally by applying an electric potential to the at least one LIG layer to achieve a bactericidal effect in the water stream. Specifically, disclosed herein a polymeric mesh suitable for use as a spacer in a membrane module in water treatment application, said mesh being at least partially coated with LIG.
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    Laser-induced graphene filters and methods of making and using same
    (2024-04-16) Tour, James M.; Stanford, Michael G.; Li, John; Chyan, Yieu; Arnusch, Christopher John; Presutti, Steven E.; Rice University; B.G. NEGEV TECHNOLOGIES and APPLICATIONS LTD., at Ben-Gurion University; United States Patent and Trademark Office
    Virus and microbe-killing, self-sterilizing resistive heated air filters and methods of making and using same methods. The air filter is includes laser-induced graphene (LIG), a porous conductive graphene foam formed through photothermal conversion of a polyimide film (or another source or source of polymer or other LIG precursor material) by a laser source. The LIG in the air filter can capture particulates and bacteria. The bacteria cannot proliferate even when submerged in culture medium. Through a periodic Joule-heating mechanism, the filter easily reaches greater than 300° C. This destroys any microorganisms including bacteria, along with molecules that can cause adverse biological reactions and diseases such as viruses, pyrogens, allergens, exotoxins, endotoxins, teichoic acids, mycotoxins, nucleic acids, and prions.
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    Methods of fabricating laser-induced graphene and compositions thereof
    (2021-11-02) Tour, James M.; Chyan, Yieu; Arnusch, Christopher John; Singh, Swatantra Pratap; Li, Yilun; Luong X, Duy; Kittrell, Carter; Ye, Ruquan; Miller, Jordan; Kinstlinger, Ian; Cofer, Savannah; Rice University; Ben-Gurion University; United States Patent and Trademark Office
    Methods that expand the properties of laser-induced graphene (LIG) and the resulting LIG having the expanded properties. Methods of fabricating laser-induced graphene from materials, which range from natural, renewable precursors (such as cloth or paper) to high performance polymers (like Kevlar). With multiple lasing, however, highly conductive PEI-based LIG could be obtained using both multiple pass and defocus methods. The resulting laser-induced graphene can be used, inter alia, in electronic devices, as antifouling surfaces, in water treatment technology, in membranes, and in electronics on paper and food Such methods include fabrication of LIG in controlled atmospheres, such that, for example, superhydrophobic and superhydrophilic LIG surfaces can be obtained. Such methods further include fabricating laser-induced graphene by multiple lasing of carbon precursors. Such methods further include direct 3D printing of graphene materials from carbon precursors. Application of such LIG include oil/water separation, liquid or gas separations using polymer membranes, anti-icing, microsupercapacitors, supercapacitors, water splitting catalysts, sensors, and flexible electronics.
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    Methods of fabricating laser-induced graphene and compositions thereof
    (2024-06-18) Tour, James M.; Chyan, Yieu; Arnusch, Christopher John; Singh, Swatantra Pratap; Li, Yilun; Luong X, Duy; Kittrell, Carter; Ye, Ruquan; Miller, Jordan; Kinstlinger, Ian; Cofer, Savannah; Rice University; B.G. Negev Technologies and Applications Ltd. at Ben-Gurion University; United States Patent and Trademark Office
    Methods that expand the properties of laser-induced graphene (LIG) and the resulting LIG having the expanded properties. Methods of fabricating laser-induced graphene from materials, which range from natural, renewable precursors (such as cloth or paper) to high performance polymers (like Kevlar). With multiple lasing, however, highly conductive PEI-based LIG could be obtained using both multiple pass and defocus methods. The resulting laser-induced graphene can be used, inter alia, in electronic devices, as antifouling surfaces, in water treatment technology, in membranes, and in electronics on paper and food Such methods include fabrication of LIG in controlled atmospheres, such that, for example, superhydrophobic and superhydrophilic LIG surfaces can be obtained. Such methods further include fabricating laser-induced graphene by multiple lasing of carbon precursors. Such methods further include direct 3D printing of graphene materials from carbon precurors. Application of such LIG include oil/water separation, liquid or gas separations using polymer membranes, anti-icing, microsupercapacitors, supercapacitors, water splitting catalysts, sensors, and flexible electronics.