Super-amphiphobic nano cellulose aerogel and preparation method and application thereof
A nano-cellulose and airgel technology, applied in the field of airgel, can solve the problems of super-hydrophobic surface oil pollution, etc., and achieve the effect of improving the strength of airgel and improving application performance
Pending Publication Date: 2019-09-20
NANJING FORESTRY UNIV
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Problems solved by technology
However, superhydrophobic surfaces may still be contaminated by low surface energy oils in practical use.
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[0028] Below in conjunction with accompanying drawing of description, the present invention will be further described.
[0029] The invention provides a preparation method of super-amphiphobic nano-cellulose airgel with a cross-linked structure, using nano-cellulose as a raw material, citric acid or maleic anhydride as a cross-linking agent, and sodium hypophosphite as a catalyst to prepare cross-linked type nano-cellulose airgel; and then using trichloro-(1H,1H,2H,2H-heptadecafluorodecyl)silane as a low surface energy modification agent, the super amphiphobic nanometer was prepared by chemical vapor deposition modification Cellulose airgel.
[0030] The preparation method is specifically, comprising the following steps:
[0031] 1) Weighing a set amount of nanocellulose, adding deionized water to stir and disperse evenly to prepare a set concentration of nanocellulose suspension;
[0032] 2) Take cross-linking agent and catalyst respectively, add in nanocellulose suspension...
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Abstract
The invention discloses a preparation method of super-amphiphobic nano cellulose aerogel with a cross-linked structure. The preparation method comprises the following steps: with nanocellulose as a raw material, citric acid or maleic anhydride as a cross-linking agent and sodium hypophosphite as a catalyst, the cross-linked nanocellulose aerogel is prepared, wherein the porous structure and surface roughness of the aerogel can be changed by controlling the cross-linking degree; the super-amphiphobic nano cellulose aerogel is prepared by taking trichloro-1-(1H,1H,2H,2H-heptadecafluorodecyl) silane as a low-surface-energy modifying reagent and then chemical vapor deposition modification is carried out. According to the super-amphiphobic nano-cellulose aerogel based on the cross-linking structure, the strength of the nano-cellulose aerogel is improved while the nano-cellulose aerogel is endowed with super-amphiphobic performance, and the practical application performance can be greatly improved.
Description
technical field [0001] The invention relates to a composite airgel based on a crosslinked structure, in particular to a superamphiphobic nano-cellulose aerogel with a crosslinked structure and its preparation method and application, belonging to the technical field of airgel. Background technique [0002] Nanocellulose aerogels combine the advantages of nanocellulose and aerogels, and are considered to be the third generation of emerging aerogels after inorganic aerogels and synthetic polymer aerogels. Due to its strong hydrophilicity, nanocellulose is easy to absorb moisture in the air, resulting in the collapse of the airgel structure, which limits its application range. In order to meet the requirements of practical applications, it is necessary to modify the nanocellulose airgel to be lyophobic. Hydrophobic modification of nanocellulose airgel has become a current research hotspot (Mulyadi A, Zhang Z, Deng Y. ACS applied materials & interfaces, 2016, 8(4): 2732-2740; Zh...
Claims
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IPC IPC(8): C08J9/36C08J9/28C08J3/24C08L1/02
CPCC08J9/36C08J9/28C08J3/24C08J2301/02C08J2201/0484
Inventor 吴伟兵张晴左克曼戴红旗
Owner NANJING FORESTRY UNIV