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Super-hydrophobic chitosan oil-absorbing sponge and preparation method thereof

An oil-absorbing sponge, chitosan technology, applied in chemical instruments and methods, other chemical processes and other directions, can solve problems such as shedding, unfavorable oil-absorbing performance, poor adhesion, etc., to reduce resistance, stabilize hydrophobicity and reusability, The effect of good superhydrophobicity

Inactive Publication Date: 2019-03-19
湖北彩砼新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, superhydrophobic particles loaded on the surface of the material will occupy a certain space, which will reduce the pore volume of the chitosan sponge, which is not conducive to the improvement of oil absorption performance; on the other hand, there is only a gap between the coating material or the loaded particles and the substrate Simple physical adsorption, poor adhesion, easy to fall off during the degreasing process, causing secondary pollution, and affecting the repeated use of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of preparation of superhydrophobic chitosan oil-absorbing sponge, concrete steps are:

[0021] (1) Chitosan-based sponge was prepared by vacuum freeze-drying method: 60 mL of chitosan acetic acid solution and sodium octyl succinate sulfonate aqueous solution with a concentration of 2 wt% were prepared respectively, and the above two solutions were mixed according to the mass ratio of 2:1 Proportional mixing and stirring for 45 min, standing overnight, cross-linking with 0.4 wt% epichlorohydrin solution for 2 h, and controlling the cross-linking temperature at 45 °C, transfer the mixed material to a six-hole plate for 12 h, put Vacuum desiccator spare;

[0022] (2) Nano-Fe 3 o 4 , basic catalyst and water were added to the reaction kettle and stirred and mixed. After the temperature rose to 60°C, ethyl orthosilicate was added, and then a silane coupling agent was added, and the prepared solution was separated under an external magnetic field, and the upper layer...

Embodiment 2

[0025] A kind of preparation method of superhydrophobic chitosan oil-absorbing sponge, concrete steps are:

[0026] (1) Chitosan-based sponge with three-dimensional porous structure was prepared by vacuum freeze-drying method: 70 mL of chitosan acetic acid solution and sodium octyl succinate sulfonate aqueous solution with a concentration of 3 wt% were prepared respectively, and the above two solutions were prepared according to Mix and stir for 50 min at a mass ratio of 1:1, let it stand overnight, use a solution of epichlorohydrin with a concentration of 0.5 wt% to crosslink for 2 h, and control the crosslinking temperature at 45 °C, transfer the mixed substance to a six-hole plate for freeze-drying for 10 h, put into a vacuum desiccator for subsequent use;

[0027] (2) Nano-Fe 3 o 4 , basic catalyst and water were added to the reaction kettle and stirred and mixed. After the temperature rose to 80°C, ethyl orthosilicate was added, and then a silane coupling agent was adde...

Embodiment 3

[0030] A kind of preparation method of superhydrophobic chitosan oil-absorbing sponge, concrete steps are:

[0031] (1) Chitosan-based sponges with a three-dimensional porous structure were prepared by vacuum freeze-drying: 65 mL of chitosan acetic acid solution and sodium octyl succinate sulfonate aqueous solution with a concentration of 2.5 wt % were prepared respectively, and the above two solutions Mix and stir for 40 minutes according to the mass ratio of 2:1, let it stand overnight, use epichlorohydrin solution with a concentration of 0.35wt% to crosslink for 1.5 hours, control the crosslinking temperature at 45°C, transfer the mixed substance to a six-hole plate for freeze-drying 11 h, put it in a vacuum desiccator for later use;

[0032] (2) Nano-Fe 3 o 4 , basic catalyst and water were added to the reaction kettle and stirred and mixed. After the temperature rose to 70°C, ethyl orthosilicate was added, and then a silane coupling agent was added, and the prepared sol...

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Abstract

The invention relates to a preparation method for super-hydrophobic chitosan oil-absorbing sponge. The preparation method comprises the following steps: (1) preparing chitosan-based sponge with a three-dimensional porous structure by using a vacuum freeze-drying method; (2) preparing modified Fe3O4 particles, and enabling the modified Fe3O4 particles and nano zinc oxide particles to be loaded in the three-dimensional porous structure of the chitosan-based sponge; and (3) soaking the obtained chitosan-based sponge in octadecanethiol-absolute ethyl alcohol solution, and repeatedly compressing and expanding, after curing, to obtain a product. Compared with existing chitosan-based sponge, the product has excellent hydrophobic oil-absorbing properties, and a high repeated utilization ratio.

Description

technical field [0001] The invention relates to a chitosan sponge, in particular to a superhydrophobic chitosan oil-absorbing sponge and a preparation method thereof. Background technique [0002] With the development of society and economy, people's production activities continue to pollute water resources, seriously threatening the natural environment on which people live. In recent years, oil spills and industrial sewage discharges have increasingly polluted the ocean and water ecological environment. According to statistics, nearly 10 million tons of oil enter the water body through various channels every day in the world, polluting the environment. Therefore, the research and development of effective oil recovery technology and oily wastewater purification materials have aroused people's close attention, and the research of oil-absorbing materials has become the key to solve the problem of oil pollution. The study found that the sponge material with both superhydropho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08J9/28C09K3/32
CPCC08J9/28C08J9/40C08J2201/048C08J2305/08C09K3/32
Inventor 王尚宏吴新年
Owner 湖北彩砼新材料有限公司
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