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Super-hydrophobic and super-oleophylic cellulose sponge as well as preparation method and application thereof

A cellulose sponge and super lipophilic technology, which is applied in the field of marine oil spill treatment and functional materials, can solve the problems of acid and alkali resistance, complex process, and fragile substrate, etc., to reduce surface energy, simple preparation method, and not easy to fall off with the effect of wear and tear

Active Publication Date: 2017-06-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, CN104725662A, CN105669985A, CN105669985A, CN105477904A, etc. have all proposed new sponge materials. Although these sponges can all achieve good oil absorption effects, they basically have defects such as complex processes, fragile substrates, and poor acid and alkali resistance.

Method used

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  • Super-hydrophobic and super-oleophylic cellulose sponge as well as preparation method and application thereof
  • Super-hydrophobic and super-oleophylic cellulose sponge as well as preparation method and application thereof
  • Super-hydrophobic and super-oleophylic cellulose sponge as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] A kind of preparation method of superhydrophobic-superoleophilic cellulose sponge provided by another aspect of the embodiment of the present invention comprises:

[0048] Provide porous cellulose sponge;

[0049] Immersing the porous cellulose sponge in a solution containing zinc salt, so that the porous cellulose sponge grows to form a ZnO micro-nano structure, and obtains a ZnO / cellulose sponge;

[0050] The ZnO / cellulose sponge is contained in the silane hydrolyzate solution containing lipophilic and hydrophobic groups, so that -Si(OH) in the silane hydrolyzate 3 At least chemically bond with the hydroxyl groups on the ZnO micro-nanostructures in the ZnO / cellulose sponge, thereby at least grafting lipophilic and hydrophobic groups on the ZnO micro-nanostructures to obtain the superhydrophobic-superoleophilic cellulose sponge.

[0051] In some more preferred embodiments, the preparation method may also include: after processing the porous cellulose sponge into a de...

Embodiment 1

[0104] Example 1: In the superhydrophobic-superoleophilic cellulose sponge provided in this example, the sponge matrix is ​​exactly the same as the sponge selected in Comparative Example 1, and both are three-dimensional porous cellulose sponges with an average pore diameter of 300 μm. However, in this embodiment, ZnO micro-nano structures are grown on the substrate, and hydrophobic chemical groups are grafted. The hydrophobic group is the growth of cellulose sponge with ZnO structure and the hydrophobic compound CH 3 (CH 2 ) 7 Si(OCH 3 ) 3 The hydrolyzate reacts, the -Si(OH) in the hydrolyzate 3 The functional groups and the hydroxyl groups in the cellulose sponge are bonded by chemical bonds and grafted onto the surface of the sponge.

[0105] The preparation method of the superhydrophobic-superoleophilic cellulose sponge of the present embodiment is as follows:

[0106] (1) is exactly the same as step (1) in comparative example 1;

[0107] (2) Add 0.02mol Zn(NO 3 ) ...

Embodiment 2

[0115] Example 2: The superhydrophobic-superoleophilic cellulose sponge used in this example is prepared in the same way as the superhydrophobic-superoleophilic cellulose sponge in Example 1, except that the average pore size of the sponge matrix is ​​500 μm cellulose sponge.

[0116] The above-mentioned superhydrophobic-superoleophilic cellulose sponge is carried out oil-absorbing property test, and test method is exactly the same as the method in comparative example 1, and the results are as follows:

[0117] After 3 minutes, the cellulose sponge was completely submerged in crude oil, and weighed after taking out the cellulose sponge: the oil absorption of the cellulose sponge was 27.5g / g, and the cellulose sponge was subjected to a speed of 2000 rpm After centrifugation for 1 minute, the oil retention rate was measured to be 90.2%.

[0118] Similar to Example 1, compared with the cellulose sponge in Comparative Example 1, the cellulose sponge in this Example 2 has excellen...

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Abstract

The invention discloses a super-hydrophobic and super-oleophylic cellulose sponge. The cellulose sponge comprises a porous cellulose sponge serving as a matrix, wherein a ZnO micro-nano structure is connected on the matrix, and at least an oleophylic and hydrophobic group is grafted on the ZnO micro-nano structure. The invention further discloses a preparation method of the uper-hydrophobic and super-oleophylic cellulose sponge. The super-hydrophobic and super-oleophylic cellulose sponge has excellent oil absorption capacity, is low in price and environment-friendly and pollution-free and can be widely used in fields such as oil spilling treatment, oil-water separation and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a superhydrophobic-superoleophilic cellulose sponge, its preparation method and application, for example, the application in the fields of oil-water separation and marine oil spill treatment. Background technique [0002] In recent years, with the development of offshore oil exploration and development and oil transportation, oil spills and other emergencies and water pollution accidents caused by the discharge of oily waste water and waste liquid have occurred frequently, and the human dust environment has posed a serious threat. At the same time It also caused huge economic losses. [0003] For incidents such as offshore oil spills, traditional treatment methods mainly include natural degradation, physical treatment and chemical treatment, among which the latter two are especially commonly used. The chemical treatment method is to change the physical a...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/40C02F1/28C08J9/40C08L1/02
Inventor 曾志翔徐梦亚王刚王立平薛群基
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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