公开(公告)号：US10576429B1

公开(公告)日：2020-03-03

申请号：US16387418

申请日：2019-04-17

Applicant: KING SAUD UNIVERSITY

Inventor： Javed Alam ,  Arun Kumar Shukla ,  Ali Kanakhir Aldalbahi ,  Mansour Alhoshan

IPC: B01D67/00 ,  B01D71/34

Abstract: Polyvinyl difluoride (PVDF) membranes prepared from casting solution including the biopolymer kappa-carrageenan (kCg) as an additive demonstrate improved structure and properties. The resulting asymmetrical structure has a thin layer on the upper surface, a porous sublayer with reduced volume of macro void space and increased porosity, and a spongy layer beneath the sublayer. This results in an increased hydrophilic nature, and provides enhanced wetting, membrane porosity, and water permeability—all important properties making these membranes suitable for a wide range of uses.

公开(公告)号：US12145865B1

公开(公告)日：2024-11-19

申请号：US18233089

申请日：2023-08-11

Applicant: KING SAUD UNIVERSITY

Inventor： Javed Alam ,  Mansour Salah Alhoshan ,  Fekri Abdulraqeb Ahmed Ali ,  Arun Kumar Shukla

IPC: C02F1/28 ,  B01J20/02 ,  B01J20/24 ,  B01J20/28 ,  B01J20/30 ,  C02F101/30 ,  C08J3/075 ,  C08J3/24

Abstract: Hydrogel nanobeads include an ionically crosslinked sulfated polysaccharide biopolymer such as a carrageenan. In an embodiment, the hydrogel nanobeads comprise kappa carrageenan (κCg) and a metal ion crosslinking agent. In an embodiment, the metal ion crosslinking agent includes a metal ion selected from the group consisting of Zn2+, Fe2+, Fe3+, and Ti3+. The hydrogel nanobeads can be used for removal of pollutants in wastewater.