US 11,964,220 B2
Hydrophilic/oleophobic sponge, preparation method and use thereof
Fu'an He, Maoming (CN); Wenxu He, Maoming (CN); Bo Lin, Maoming (CN); Dehao Li, Maoming (CN); Zengtian Li, Maoming (CN); and Wanyi Chen, Maoming (CN)
Assigned to Guangdong University of Petrochemical Technology, Maoming (CN)
Appl. No. 17/044,225
Filed by Guangdong University of Petrochemical Technology, Guangdong (CN)
PCT Filed Jun. 18, 2019, PCT No. PCT/CN2019/091613
§ 371(c)(1), (2) Date Sep. 30, 2020,
PCT Pub. No. WO2020/211186, PCT Pub. Date Oct. 22, 2020.
Claims priority of application No. 201910303861.X (CN), filed on Apr. 16, 2019.
Prior Publication US 2021/0346823 A1, Nov. 11, 2021
Int. Cl. B01D 17/02 (2006.01); C08J 9/42 (2006.01)
CPC B01D 17/0202 (2013.01) [C08J 9/42 (2013.01); C08J 2361/28 (2013.01); C08J 2375/04 (2013.01); C08J 2405/08 (2013.01); C08J 2429/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A preparation method of a hydrophilic/oleophobic sponge, comprising the following steps:
mixing a nanoparticle suspension with a modifier solution to obtain a modified solution, wherein the nanoparticle suspension comprises a silica-encapsulated Fe3O4 nanoparticle suspension and/or a nano-silica ethanol suspension, and the modifier solution is a mixture of chitosan-acetic acid aqueous solution and polyvinyl alcohol (PVA) aqueous solution; and
soaking a sponge in the modified solution, mixing and crosslinking with glutaraldehyde aqueous solution to obtain the hydrophilic/oleophobic sponge:
wherein a mass ratio of modifiers in the modifier solution to glutaraldehyde in the glutaraldehyde aqueous solution is (2.7-1.5):(0.020-0.10).