Title:
HIGH-THROUGHPUT SUPER-HYDROPHOBIC WOOD, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/284228
Kind Code:
A1
Abstract:
The present invention relates to the field of super-hydrophobic materials, and relates in particular to a preparation method for high-throughput super-hydrophobic wood, which comprises the following steps: first, placing wood in a mixed solution of sodium hydroxide and sodium sulfite at 80-100°C for 6-12 h so as to partially remove hemicellulose and lignin; then, placing the mixed solution in a hydrogen peroxide solution at 80-100°C to heat for 0.5-2.5 h so as to further remove lignin; freezing the wood and freeze-drying same for 4-10 h, then soaking the wood in 2-20 wt% polydimethylsiloxane solution, removing same, and curing at 60-100°C for 3-6 h to obtain high-throughput super-hydrophobic wood. The contact angle of water droplets on a surface of the super-hydrophobic wood prepared in the present invention can reach 156°, and the super-hydrophobic wood has a vertical arrangement and a porous structure having large pore sizes, which allows high-throughput oil-water separation to be quickly carried out under the drive of gravity, wherein the separation throughput can reach 7165 L·m-2·h -1. Relative to conventional oil-water separating materials, said wood has the features of having excellent performance, being easy to prepare, being natural and renewable, and having low application energy consumption and the like.
Inventors:
WU WENJIAN (CN)
CHEN ZHUOHAN (CN)
SU XIAOJING (CN)
LI KUNQUAN (CN)
CHEN ZHUOHAN (CN)
SU XIAOJING (CN)
LI KUNQUAN (CN)
Application Number:
PCT/CN2021/135176
Publication Date:
January 19, 2023
Filing Date:
December 16, 2021
Export Citation:
Assignee:
UNIV DONGGUAN TECHNOLOGY (CN)
International Classes:
B01D17/022; B01J20/28; B01J20/30; C02F1/28
Foreign References:
| CN113499760A | 2021-10-15 | |||
| CN110497492A | 2019-11-26 | |||
| CN109608683A | 2019-04-12 | |||
| CN101148820A | 2008-03-26 |
Other References:
SHI ZENG-QIAN,FU FENG,WANG SI-QUN,HE SHENG,YANG RUI: "Hydrophobic Property of Chinese Fir Treated with Different Chemicals", CHINA WOOD INDUSTRY, vol. 26, no. 4, 5 July 2012 (2012-07-05), pages 16 - 20, XP093023937, ISSN: 1001-8654, DOI: 10.19455/j.mcgy.2012.04.005
Attorney, Agent or Firm:
SHENZHEN CCIPM PATENT AGENCY PARTNERSHIP (CN)
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