-
公开(公告)号：US12109537B1
公开(公告)日：2024-10-08
申请号：US18444479
申请日：2024-02-16
CPC分类号： B01D69/02 , B01D17/04 , B01D61/147 , B01D69/1218 , B01D71/262 , B01D2325/0233 , B01D2325/04 , B01D2325/06 , B01D2325/24 , B01D2325/38
摘要： A bi-layered superhydrophobic membrane includes top and base layers formed from polypropylene. The bi-layered superhydrophobic membrane can have a thickness ranging from about 100 μm to about 1 mm. When subjected to oil-water emulsion separations, the superhydrophobic membrane can achieve an organic solvent flux of 14,000 Lm−2h−1 with a 96% water rejection. The bi-layered superhydrophobic membrane can be effectively used for water filtration, providing both selectivity and permeability, while offering an eco-friendly solution for reuse of polypropylene plastic waste.
-
2.发明授权公开(公告)号：US12030034B1
公开(公告)日：2024-07-09
申请号：US18237504
申请日：2023-08-24
IPC分类号： B01J20/26 , B01J20/28 , B01J20/30 , C02F1/28 , C02F101/32
CPC分类号： B01J20/261 , B01J20/28035 , B01J20/3064 , C02F1/288 , C02F2101/32
摘要： A multi-layered oil sorbent formed from two superposed polyolefin thin films and a polypropylene (PP) fibrous thin sheet sandwiched between the two superposed polyolefin thin films. Each of the two superposed polyolefin thin films include a plurality of pores defined therethrough and a plurality of swellable cavities extending from a surface thereof. In an embodiment, the cavities of each two superposed polyolefin thin films extend from a respective polyolefin film surface toward the PP fibrous thin sheet. The two superposed polyolefin thin films with the PP fibrous thin sheet sandwiched therebetween are sealed together by a zigzag-shaped heat seal. The plurality of cavities on the surface of the multi-layered sorbent can swell when contacted with oil. The cavities coupled with the zigzag-shaped seal maximize the available volume for uptake of oil and organic pollutants from water.
-
3.发明授权公开(公告)号：US11938658B1
公开(公告)日：2024-03-26
申请号：US18119235
申请日：2023-03-08
IPC分类号： B29C49/00 , B29C41/00 , B29C41/08 , B29K105/04 , B29K105/26
CPC分类号： B29C41/085 , B29C41/003 , B29K2105/041 , B29K2105/26
摘要： Freestanding microporous thin films, made using plastic waste, can be used as a hydrophobic coating, filtration membranes, or oil-sorbents. A method for producing the microporous thin film involves dissolving the plastic in an organic solvent to obtain a solution; and applying the solution onto a solid substrate through spin-coating followed by controlled heating, resulting in a freestanding porous thin film. Plastic waste comprises recycled polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), or polystyrene (PS), recovered from a waste plastic material derived from post-consumer and/or industrial waste. The approach of fabricating multi-functional thin films from plastic waste combines an effective way to address multiple environmental issues simultaneously.
-
公开(公告)号：US11958036B1
公开(公告)日：2024-04-16
申请号：US18241387
申请日：2023-09-01
IPC分类号： B01J20/26 , B01J20/28 , B01J20/30 , C02F1/28 , C02F1/40 , C08J5/18 , C08J9/26 , C02F101/32 , C02F103/00
CPC分类号： B01J20/261 , B01J20/28004 , B01J20/28033 , B01J20/3007 , B01J20/3064 , B01J20/3071 , C02F1/285 , C02F1/40 , C08J5/18 , C08J9/26 , C02F2101/32 , C02F2103/007 , C02F2303/16 , C08J2201/0446 , C08J2205/044 , C08J2323/06
摘要： Freestanding porous polyethylene thin film, and a method for preparing a freestanding porous polyethylene thin film. The method includes dissolving polyethylene in an organic solvent to form a solution under reflux conditions; adding a swellable pocket forming agent to the solution and mixing the solution until the swellable pocket forming agent is well-dispersed therein; applying the well-dispersed solution onto a solid substrate through spin coating to form a thin film on the solid substrate; peeling the thin film off the solid substrate; and extracting the swellable pocket forming agent from the peeled thin film by washing the peeled thin film in water, thereby obtaining a freestanding porous polyethylene thin film with swellable pockets, macro-voids, and micropores. The freestanding porous polyethylene thin film can be used as an oil sorbent. The freestanding porous polyethylene thin film has about 500 to about 800 swellable cavities per cm2.
-
公开(公告)号：US11958035B1
公开(公告)日：2024-04-16
申请号：US18236372
申请日：2023-08-21
IPC分类号： B01J20/26 , B01J20/28 , B01J20/30 , C02F101/32
CPC分类号： B01J20/261 , B01J20/28004 , B01J20/28033 , B01J20/3021 , B01J20/3064 , B01J20/3071 , C02F2101/32
摘要： Polypropylene (PP) and polyethylene (PE) blends derived from plastic waste streams and a method to prepare reusable oil sorbents. A method includes separating plastics of group-A from group-B using a float-sink technique, where group-A comprises various PP and PE materials, and group-B comprises polystyrene, polyethylene terephthalate, and polyvinyl chloride; dissolving the group-A plastics in a solvent; adding a cavity forming agent to the solution; applying the solution onto a solid substrate through spin-coating followed by controlled heating; and extracting the cavity forming agent, obtaining a thin film sorbent with swellable cavities for oil sorption. The film contains 400-800 swellable 3D cavities/cm2, each cavity capable of swelling 20-30 times the thickness of the film when contacted with oil. The method improves compatibility of PP-PE blends without using compatibilizers, resulting in high oil uptake capacity due to swellable cavities, and reusability of sorbent with an oil recovery of more than 98%.
-
公开(公告)号：US11883792B1
公开(公告)日：2024-01-30
申请号：US18241612
申请日：2023-09-01
IPC分类号： B01J20/26 , B01J20/28 , B01J20/30 , C02F1/28 , C08J5/18 , C08J9/26 , C09K103/00 , C09K3/32 , C02F103/00 , C02F101/32
CPC分类号： B01J20/261 , B01J20/28004 , B01J20/28033 , B01J20/3007 , B01J20/3064 , B01J20/3071 , C02F1/285 , C08J5/18 , C08J9/26 , C02F2101/32 , C02F2103/007 , C02F2303/16 , C08J2201/0446 , C08J2323/12 , C09K3/32
摘要： Sponge-like porous polypropylene thin film, and a method for preparing a sponge-like porous polypropylene thin film. The method includes dissolving polypropylene in an organic solvent to form a solution under reflux condition; adding a cavity forming agent to the solution and mixing the solution until the cavity forming agent is well-dispersed therein; applying the well-dispersed solution onto the solid substrate through spin coating to form a thin film on the solid substrate; peeling the thin film off the solid substrate; extracting the cavity forming agent from the peeled thin film by washing the peeled thin film in an aqueous or nonaqueous solvent, thereby obtaining a sponge-like porous polypropylene thin film with cavities, macro-voids, and micropores. The sponge-like porous polypropylene thin film is used as an oil sorbent. The sponge-like porous polypropylene thin film has about 400 to about 700 swellable cavities per cm2.
-
公开(公告)号：US12128381B1
公开(公告)日：2024-10-29
申请号：US18618731
申请日：2024-03-27
IPC分类号： B01J20/26 , B01J20/28 , B01J20/30 , C02F101/32
CPC分类号： B01J20/261 , B01J20/28004 , B01J20/28033 , B01J20/3021 , B01J20/3064 , B01J20/3071 , C02F2101/32
摘要： Polypropylene (PP) and polyethylene (PE) blends derived from plastic waste streams and a method to prepare reusable oil sorbents. A method includes separating plastics of group-A from group-B using a float-sink technique, where group-A comprises various PP and PE materials, and group-B comprises polystyrene, polyethylene terephthalate, and polyvinyl chloride; dissolving the group-A plastics in a solvent; adding a cavity forming agent to the solution; applying the solution onto a solid substrate through spin-coating followed by controlled heating; and extracting the cavity forming agent, obtaining a thin film sorbent with swellable cavities for oil sorption. The film contains 400-800 swellable 3D cavities/cm2, each cavity capable of swelling 20-30 times the thickness of the film when contacted with oil. The method improves compatibility of PP-PE blends without using compatibilizers, resulting in high oil uptake capacity due to swellable cavities, and reusability of sorbent with an oil recovery of more than 98%.
-
公开(公告)号：US12005421B1
公开(公告)日：2024-06-11
申请号：US18377888
申请日：2023-10-09
IPC分类号： B01J20/24 , B01J20/28 , B01J20/30 , C02F1/28 , C02F101/30
CPC分类号： B01J20/24 , B01J20/28004 , B01J20/28014 , B01J20/28061 , B01J20/28083 , B01J20/3028 , B01J20/305 , B01J20/3078 , C02F1/286 , C02F2101/308
摘要： A method of preparing an adsorbent can include pyrolyzing sugarcane bagasse to provide a bagasse char, activating the bagasse char, dissolving polyolefin waste in an organic solvent to obtain a solution, dispersing the bagasse char in the solution to provide a mixture, extracting the organic solvent from the mixture to provide a composite, and annealing the composite to provide the adsorbent. The adsorbent can be porous.
-
公开(公告)号：US11896950B1
公开(公告)日：2024-02-13
申请号：US18378297
申请日：2023-10-10
CPC分类号： B01J20/20 , B01J20/261 , B01J20/3078 , B01J20/3085 , C02F1/283 , C08K3/04 , B01J2220/46 , C02F2101/308
摘要： A method of preparing an adsorbent can include pyrolyzing olive stone to provide an olive stone char, activating the olive stone char, dissolving a polymer in an organic solvent to obtain a solution, dispersing the activated olive stone char in the solution to provide a mixture, extracting the solvent from the mixture to provide a composite, and annealing the composite to provide the adsorbent. The adsorbent can be porous.
-
公开(公告)号：US11859065B1
公开(公告)日：2024-01-02
申请号：US18133985
申请日：2023-04-12
CPC分类号： C08J7/042 , C08J11/08 , C09D5/08 , C09D5/1681 , C09D7/20 , C09D123/12 , C08J2323/12
摘要： Polypropylene (PP) superhydrophobic sheets and a fabrication method thereof are provided. Superhydrophobic PP sheets of varying thickness having a base layer and a top layer may be fabricated using recycled or waste PP, where the fabrication process uses 20% of total plastic waste to prepare said sheets having contact angles ranging from 140 to 160 degrees. The polypropylene (PP) superhydrophobic sheets may impart protective water-repellent properties against the elements.
-
-
-
-
-
-
-
-
-
搜索结果
14 条记录 (耗时 0.023 秒)
