公开(公告)号：US20200376461A1

公开(公告)日：2020-12-03

申请号：US16668974

申请日：2019-10-30

Applicant: TUSKEGEE UNIVERSITY

Inventor： Vijaya Rangari ,  Boniface Tiimob ,  Vitus Apalangya ,  Shaik Jeelani ,  Temesgen Samuel

IPC: B01J20/02 ,  C02F1/50 ,  B01J20/20 ,  B01J20/04 ,  B01J20/28 ,  B01J20/30 ,  B01J20/32 ,  C02F1/28 ,  B01D39/06 ,  C02F1/00

Abstract: A water filtration system is provided that comprises a combination of two components: silver nanoparticles immobilized on a porous carbon solid matrix and calcium carbonate silver nanoparticles. The silver nanoparticles immobilized on the porous carbon solid matrix are prepared in a one-step wet ball milling process that does not use an environmentally hazardous reducing agent or an organic stabilizer. The calcium carbonate in the calcium carbonate silver nanoparticles is preferably isolated from egg shells. The two filter components can be present in any ratio but an approximate 50:50 ratio is preferred. Also provided is an in situ method of preparing silver nanoparticles on active charcoal. Powdered activated charcoal and silver nitrate are mixed together in a mixture of ethanol and water to form a charcoal-silver nitrate solution which is then subjected to ball milling in the presence of polypropylene glycol to produce silver nanoparticles on active charcoal.

公开(公告)号：US10583417B2

公开(公告)日：2020-03-10

申请号：US15492878

申请日：2017-04-20

Applicant: TUSKEGEE UNIVERSITY

Inventor： Vijaya Rangari ,  Boniface Tiimob ,  Vitus Apalangya ,  Shaik Jeelani ,  Temesgen Samuel

IPC: B01J20/02 ,  B01J20/28 ,  B01J20/30 ,  B01J20/32 ,  C02F1/28 ,  C02F1/50 ,  B01J20/20 ,  B01J20/04 ,  B01D39/06 ,  C02F1/00

Abstract: A water filtration system is provided that comprises a combination of two components: silver nanoparticles immobilized on a porous carbon solid matrix and calcium carbonate silver nanoparticles. The silver nanoparticles immobilized on the porous carbon solid matrix are prepared in a one-step wet ball milling process that does not use an environmentally hazardous reducing agent or an organic stabilizer. The calcium carbonate in the calcium carbonate silver nanoparticles is preferably isolated from egg shells. The two filter components can be present in any ratio but an approximate 50:50 ratio is preferred. Also provided is an in situ method of preparing silver nanoparticles on active charcoal. Powdered activated charcoal and silver nitrate are mixed together in a mixture of ethanol and water to form a charcoal-silver nitrate solution which is then subjected to ball milling in the presence of polypropylene glycol to produce silver nanoparticles on active charcoal.

公开(公告)号：US11613648B1

公开(公告)日：2023-03-28

申请号：US17393315

申请日：2021-08-03

Applicant: TUSKEGEE UNIVERSITY

Inventor： Vijaya Rangari ,  Boniface Tiimob

IPC: C08J3/21 ,  C08J3/14 ,  C08J3/11 ,  C08J3/09 ,  C08L67/02 ,  C08L67/04 ,  C08K5/00 ,  C08K7/00 ,  C08L77/00 ,  C08L89/00 ,  C08J5/18 ,  C08J3/215 ,  B82Y40/00 ,  B82Y30/00

Abstract: A biopolymer blend is provided that comprises a combination of three components: poly (butylene adipate-co-terephthalate) (PBAT); agriculture sourced polylactic acid (PLA); and engineered proteinaceous eggshell nanoparticles. The two polymer components can be present in any ratio but an approximate 70:30 ratio is preferred. The engineered proteinaceous eggshell nanoparticles are preferably about 10-25 nanometers. Also provided are methods of preparing biopolymer film and packaging components. Pelleted poly (butylene adipate-co-terephthalate) and agriculture sourced polylactic acid (PLA) are dissolved in chloroform and mixed together to form a polymer blend, and engineered proteinaceous eggshell nanoparticles are incorporated into the polymer blend, which is then extruded to create a biopolymer film or component.

公开(公告)号：US11325099B2

公开(公告)日：2022-05-10

申请号：US16668974

申请日：2019-10-30

Applicant: TUSKEGEE UNIVERSITY

Inventor： Vijaya Rangari ,  Boniface Tiimob ,  Vitus Apalangya ,  Shaik Jeelani ,  Temesgen Samuel

IPC: B01J20/20 ,  B01J20/02 ,  B01J20/04 ,  B01J20/28 ,  B01J20/30 ,  B01J20/32 ,  B01D39/06 ,  C02F1/50 ,  C02F1/28 ,  C02F1/00

Abstract: A water filtration system is provided that comprises a combination of two components: silver nanoparticles immobilized on a porous carbon solid matrix and calcium carbonate silver nanoparticles. The silver nanoparticles immobilized on the porous carbon solid matrix are prepared in a one-step wet ball milling process that does not use an environmentally hazardous reducing agent or an organic stabilizer. The calcium carbonate in the calcium carbonate silver nanoparticles is preferably isolated from egg shells. The two filter components can be present in any ratio but an approximate 50:50 ratio is preferred. Also provided is an in situ method of preparing silver nanoparticles on active charcoal. Powdered activated charcoal and silver nitrate are mixed together in a mixture of ethanol and water to form a charcoal-silver nitrate solution which is then subjected to ball milling in the presence of polypropylene glycol to produce silver nanoparticles on active charcoal.

公开(公告)号：US11078359B2

公开(公告)日：2021-08-03

申请号：US16040250

申请日：2018-07-19

Applicant: TUSKEGEE UNIVERSITY

Inventor： Vijaya Rangari ,  Boniface Tiimob

IPC: C08L67/02 ,  C08L67/04 ,  C08K5/00 ,  C08K7/00 ,  C08L77/00 ,  C08L89/00 ,  C08J5/18 ,  B82Y40/00 ,  B82Y30/00

Abstract: A biopolymer blend is provided that comprises a combination of three components: poly (butylene adipate-co-terephthalate) (PBAT); agriculture sourced polylactic acid (PLA); and engineered proteinaceous eggshell nanoparticles. The two polymer components can be present in any ratio but an approximate 70:30 ratio is preferred. The engineered proteinaceous eggshell nanoparticles are preferably about 10-25 nanometers. Also provided are methods of preparing biopolymer film and packaging components. Pelleted poly (butylene adipate-co-terephthalate) and agriculture sourced polylactic acid (PLA) are dissolved in chloroform and mixed together to form a polymer blend, and engineered proteinaceous eggshell nanoparticles are incorporated into the polymer blend, which is then extruded to create a biopolymer film or component.

公开(公告)号：US20180305228A1

公开(公告)日：2018-10-25

申请号：US15492878

申请日：2017-04-20

Applicant: TUSKEGEE UNIVERSITY

Inventor： Vijaya Rangari ,  Boniface Tiimob ,  Vitus Apalangya ,  Shaik Jeelani ,  Temesgen Samuel

IPC: C02F1/50 ,  B01J20/20 ,  B01J20/02 ,  B01J20/04 ,  B01J20/28 ,  B01J20/30 ,  B01J20/32 ,  C02F1/28 ,  B01D39/20

Abstract: A water filtration system is provided that comprises a combination of two components: silver nanoparticles immobilized on a porous carbon solid matrix and calcium carbonate silver nanoparticles. The silver nanoparticles immobilized on the porous carbon solid matrix are prepared in a one-step wet ball milling process that does not use an environmentally hazardous reducing agent or an organic stabilizer. The calcium carbonate in the calcium carbonate silver nanoparticles is preferably isolated from egg shells. The two filter components can be present in any ratio but an approximate 50:50 ratio is preferred. Also provided is an in situ method of preparing silver nanoparticles on active charcoal. Powdered activated charcoal and silver nitrate are mixed together in a mixture of ethanol and water to form a charcoal-silver nitrate solution which is then subjected to ball milling in the presence of polypropylene to produce silver nanoparticles on active charcoal.