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Hyperelastic composite aerogel for efficient oil-water separation and preparation method of superelastic composite aerogel
The invention discloses superelastic composite aerogel for efficient oil-water separation and a preparation method of the superelastic composite aerogel. The preparation method comprises the following steps: carrying out delignification and mechanical hemicellulose removal treatment on waste wood blocks to obtain biomass cellulose, then adding polyvinyl alcohol, graphene powder and a cross-linking agent, carrying out violent stirring and ultrasonic dispersion, and carrying out repeated freezing and unfreezing processes to obtain polyvinyl alcohol/cellulose/graphene hydrogel; after impurities are removed, the polyvinyl alcohol/cellulose/graphene aerogel is obtained through a freeze drying process. And carrying out surface modification by using a fluorine-containing surfactant to obtain the polyvinyl alcohol/cellulose/graphene aerogel with hydrophilic and oleophobic characteristics. The polyvinyl alcohol/cellulose/graphene aerogel prepared by the invention has the characteristics of light weight, high porosity, high water flux, underwater hyperelasticity and oil repellency, can obviously improve the oil-water separation efficiency and the stability of the separation process, and shows huge potential to cope with marine oil stains.
本发明公开了一种高效油水分离的超弹性复合气凝胶及其制备方法。本发明将废弃的木块进行脱木质素，机械脱半纤维素处理得到生物质纤维素，然后加入聚乙烯醇，石墨烯粉末和交联剂，经过剧烈搅拌和超声分散后，经过反复冷冻解冻工艺得到聚乙烯醇/纤维素/石墨烯水凝胶，去除杂质后通过冷冻干燥工艺得到聚乙烯醇/纤维素/石墨烯气凝胶。利用含氟表面活性剂进行表面改性得到具有亲水疏油特性的聚乙烯醇/纤维素/石墨烯气凝胶。本发明制备的聚乙烯醇/纤维素/石墨烯气凝胶具有轻质，高孔隙率，高水通量，水下超弹性，和拒油特性，能显著提高油水分离效率和分离过程的稳定性，显示出应对海洋油污的巨大潜力。
Hyperelastic composite aerogel for efficient oil-water separation and preparation method of superelastic composite aerogel
The invention discloses superelastic composite aerogel for efficient oil-water separation and a preparation method of the superelastic composite aerogel. The preparation method comprises the following steps: carrying out delignification and mechanical hemicellulose removal treatment on waste wood blocks to obtain biomass cellulose, then adding polyvinyl alcohol, graphene powder and a cross-linking agent, carrying out violent stirring and ultrasonic dispersion, and carrying out repeated freezing and unfreezing processes to obtain polyvinyl alcohol/cellulose/graphene hydrogel; after impurities are removed, the polyvinyl alcohol/cellulose/graphene aerogel is obtained through a freeze drying process. And carrying out surface modification by using a fluorine-containing surfactant to obtain the polyvinyl alcohol/cellulose/graphene aerogel with hydrophilic and oleophobic characteristics. The polyvinyl alcohol/cellulose/graphene aerogel prepared by the invention has the characteristics of light weight, high porosity, high water flux, underwater hyperelasticity and oil repellency, can obviously improve the oil-water separation efficiency and the stability of the separation process, and shows huge potential to cope with marine oil stains.
本发明公开了一种高效油水分离的超弹性复合气凝胶及其制备方法。本发明将废弃的木块进行脱木质素，机械脱半纤维素处理得到生物质纤维素，然后加入聚乙烯醇，石墨烯粉末和交联剂，经过剧烈搅拌和超声分散后，经过反复冷冻解冻工艺得到聚乙烯醇/纤维素/石墨烯水凝胶，去除杂质后通过冷冻干燥工艺得到聚乙烯醇/纤维素/石墨烯气凝胶。利用含氟表面活性剂进行表面改性得到具有亲水疏油特性的聚乙烯醇/纤维素/石墨烯气凝胶。本发明制备的聚乙烯醇/纤维素/石墨烯气凝胶具有轻质，高孔隙率，高水通量，水下超弹性，和拒油特性，能显著提高油水分离效率和分离过程的稳定性，显示出应对海洋油污的巨大潜力。
Hyperelastic composite aerogel for efficient oil-water separation and preparation method of superelastic composite aerogel
一种高效油水分离的超弹性复合气凝胶及其制备方法
TANG SHAOCHUN (author) / CHEN YU (author)
2023-08-18
Patent
Electronic Resource
Chinese
IPC:
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
B01D
SEPARATION
,
Trennen
/
C02F
Behandlung von Wasser, Schmutzwasser, Abwasser oder von Abwasserschlamm
,
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
/
C08J
Verarbeitung
,
WORKING-UP
/
C08K
Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe
,
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
/
C08L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
,
Massen auf Basis makromolekularer Verbindungen
/
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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