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Preparation method of super-hydrophobic, super-oleophylic and ultralight sponge

A super-oleophilic and super-hydrophobic technology, which is applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problems of poor oil absorption stability of hydrophobic melamine sponge, increased preparation and use costs, and reduced oil absorption performance.

Active Publication Date: 2015-02-04
中科瑞丽分离科技无锡有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

As reported by Nguyen et al. (Energy Environ. Sci., 2012, 5, 7908-7912), graphene and polydimethylsiloxane (PDMS) nanocomposites were coated on the melamine sponge skeleton by impregnation. , to obtain a hydrophobic melamine sponge, the material can absorb 100 times the weight of the organic solvent itself; but the hydrophobic melamine sponge obtained by this method has poor oil absorption stability, and the oil absorption performance is significantly reduced after recycling; in addition , the modification of the material involves the preparation of graphene and the dispersion in the polymer, which greatly increases the cost of material preparation and use
Recently, Ruan et al. also reported (Angew. Chem. Int. Ed., 2014, 53, 5556~5560) that polydopamine and perfluorododecanethiol were used to modify melamine sponge to obtain superhydrophobic and superlipophilic melamine sponge, but this method involves multi-step chemical reactions such as the polymerization of dopamine on the surface of melamine sponge and the grafting of perfluorododecanethiol on polydopamine. The process is cumbersome and the cost of chemical modification reagents used is relatively high. , so that this method is subject to certain limitations in practical applications

Method used

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  • Preparation method of super-hydrophobic, super-oleophylic and ultralight sponge
  • Preparation method of super-hydrophobic, super-oleophylic and ultralight sponge
  • Preparation method of super-hydrophobic, super-oleophylic and ultralight sponge

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Embodiment 1

[0019] a. Preparation of binary siloxane hydrolysis system: the hydrolysis system of binary siloxane contains difunctional alkoxysilane as dimethyldimethoxysilane and tetrafunctional alkoxysilane as tetramethoxysilane , methanol-water system with pH=10; the mass of dimethyldimethoxysilane and tetramethoxysilane accounts for 1.5% of the mass of the hydrolysis system, and the mass of dimethyldimethoxysilane accounts for 0.5% of the mass of the hydrolysis system %, the quality of tetramethoxysilane accounts for 1% of the hydrolysis system; the quality of methanol-water accounts for 98.5% of the hydrolysis system, wherein methanol accounts for 88.5% of the hydrolysis system quality, and water accounts for 10% of the hydrolysis system quality; Sodium hydroxide adjusts the pH of the hydrolysis system to 10; hydrolyze the prepared binary siloxane system at a temperature of 50°C for 6 hours to obtain a binary siloxane hydrolysis system for use; among them, sodium hydroxide can be repla...

Embodiment 2

[0023] a. Preparation of binary siloxane hydrolysis system: the hydrolysis system of binary siloxane is diethyldiethoxysilane containing difunctional alkoxysilane and tetraethoxysilane containing tetrafunctional alkoxysilane And pH = 8 ethanol-water system; the quality of diethyldiethoxysilane and tetraethoxysilane accounted for 9% of the hydrolysis system quality, wherein the quality of diethyldiethoxysilane accounted for 3% of the hydrolysis system %, the quality of tetraethoxysilane accounts for 6% of the hydrolysis system; the quality of ethanol-water accounts for 91% of the hydrolysis system, wherein ethanol accounts for 71% of the hydrolysis system quality, and water accounts for 20% of the hydrolysis system quality; Ethylenediamine adjusts the pH of the hydrolysis system to 8, and hydrolyzes the prepared binary siloxane system at a temperature of 60°C for 2 hours to obtain a binary siloxane hydrolysis system for use; among them, ethylenediamine can be replaced by ethylam...

Embodiment 3

[0027]a. Preparation of binary siloxane hydrolysis system: the hydrolysis system of binary siloxane contains trifunctional alkoxysilane as methyltriethoxysilane and tetrafunctional alkoxysilane as tetrapropoxysilane and Ethanol-water system with pH=3; the quality of methyltriethoxysilane and tetrapropoxysilane accounts for 0.6% of the mass of the hydrolysis system, wherein the quality of methyltriethoxysilane accounts for 0.2% of the hydrolysis system, four The quality of propoxysilane accounts for 0.4% of the hydrolysis system; the quality of ethanol-water accounts for 99.4% of the hydrolysis system, wherein ethanol accounts for 94.4% of the hydrolysis system quality, and water accounts for 5% of the hydrolysis system quality; pH=3; hydrolyze the prepared binary siloxane system at a temperature of 40°C for 12 hours to obtain a binary siloxane hydrolysis system for use; among them, methyltriethoxysilane can be replaced by methyltrimethoxy Silane, hydrochloric acid can be repla...

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Abstract

The invention relates to a preparation method of super-hydrophobic, super-oleophylic and ultralight sponge. The preparation method comprises two steps of performing functionalized processing on melamine sponge by using an impregnation method and performing a curing reaction after processing. The melamine sponge used by the invention has a large quantity of active functional groups such as hydroxyl groups and amino groups on the surface, the content of the hydrophobic active functional groups on the surface of the sponge is remarkably reduced after the active groups are chemically functionalized, which causes a result that the surface energy of the material is reduced, thus the sponge is endowed with super-hydrophobic and super-oleophylic effects, and a contact angle between the sponge and water exceeds 150 degrees; and the modified melamine sponge belongs to an ultralight material due to density. The method disclosed by the invention has the advantages that raw materials are low in price and easy to available, the process is simple and easy to operate, the large-scale preparation is easily realized, and the like. The sponge prepared according to the preparation method has the advantages of low density, excellent compression resistance, high oil absorbing speed, high oil absorbing rate, high oil and water separation selectivity and the like, is a novel and efficient ultralight-density oil and water separating material, and has a wide application prospect in the fields such as organic chemical reagent treatment, oil-containing wastewater treatment, and leaking crude oil recovery.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental functional materials, and in particular relates to a preparation method of a superhydrophobic, superoleophilic and ultralight sponge. Background technique [0002] Various oil products (petroleum and its products, edible oil, etc.) bring convenience to people's daily life, but also bring huge safety and health risks. For example: the oily sewage produced in the process of crude oil mining, processing, transportation, etc. will cause the environmental medium to lack oxygen and lead to ecological disasters; waste edible oils and fats (commonly known as gutter oil) will be discharged together with domestic sewage, which will have a negative impact on the urban sewage treatment system , and the effective separation and recycling of the above-mentioned waste from water has become the key to its high-value utilization. The design, preparation and application of high-efficiency oil-...

Claims

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Application Information

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IPC IPC(8): B01D17/022
CPCB01D17/0202
Inventor 马鹏程穆磊陈军腾杨苏东
Owner 中科瑞丽分离科技无锡有限公司
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