Preparation method of sodium alginate/cattail/graphene oxide composite aerogel

A graphene composite and composite airgel technology, which is applied in chemical instruments and methods, alkali metal compounds, water/sludge/sewage treatment, etc., can solve the problems of low mechanical strength and poor mechanical properties of biomass airgel , to achieve the effect of excellent mechanical properties, superior mechanical properties and low cost
CN108654579AActive Publication Date: 2018-10-16JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU UNIV
Publication Date
2018-10-16

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Abstract

The invention relates to a preparation method of a sodium alginate / cattail / graphene oxide composite aerogel, and belongs to the technical field of preparation of biomass-based functional materials. The preparation method comprises the following specific steps: mixing sodium alginate powder and cattail fiber, adding the mixture into graphene oxide dispersion, and carrying out stirring to obtain a uniform mixed solution; carrying out freeze-drying by a two-way freeze casting method to obtain an un-crosslinked composite aerogel, immersing the composite aerogel in an ethanol / water mixed solution containing CaCl2, and then carrying out freeze-drying for a second time to obtain a calcium ion crosslinked sodium alginate / cattail / graphene oxide composite aerogel. According to the preparation methodprovided by the invention, a simple, efficient, economical and environment-friendly synthesis method is adopted to obtain a three-dimensional parallel laminated structure, parallel sheets are connected with one another by honeycomb holes, and the three-dimensional parallel laminated structure has an excellent underwater super-oleophobic property; and after the composite aerogel and a filter instrument are assembled, insoluble oil and water-soluble dyes can be synchronously removed, and the composite aerogel has a good application value and a wide market prospect.
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Description

technical field

[0001] The invention relates to a preparation method of a sodium alginate / typha / graphene oxide composite airgel, which belongs to the technical field of preparation of biomass-based functional materials. Background technique

[0002] Due to the increasing discharge of water-soluble organic pollutants such as oily sewage and dyes year by year, a variety of organic pollutants coexist in wastewater. How to simultaneously remove these organic pollutants in water has become the focus of attention worldwide. The rapid and efficient separation of oil-water mixture and the removal of water-soluble organic pollutants are of great practical significance not only for the governance and protection of the ecological environment, but also for the recycling of renewable resources. However, the traditional removal methods of organic pollutants, such as by burning, mechanical treatment, adding dispersant, biological treatment and so on. Some have low removal efficiency, some...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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