Method for preparing multi-layer oil absorption material by use of vacuum spraying method

Abstract

The invention relates to a method for preparing a multi-layer oil absorption material by use of a vacuum spraying method. The method mainly includes the following steps: dissolving a plurality of oil absorption substances with different oil absorption rates in solvents respectively; and coating different oil absorption substance solutions onto a carrier layer by the vacuum spraying method according to the sequence that the oil absorption rates of the solutions decrease progressively, thus obtaining the oil absorption material containing multiple oil absorption layers with oil absorption rates decreasing progressively outwards from the carrier layer, wherein the mass percentage of remained oil is 92%-99%. According to the invention, the adopted vacuum spraying method combines a vacuum condition and a liquid phase technology fully, and integrates the advantages of a chemical technology, and can be used for preparing the nanometer material with light weight, large area, uniform and controllable thickness and a controllable inner nanostructure. The method is simple in operation. According to the technical scheme of the prepared oil absorption material, the oil remaining capacity of oil absorption materials can be greatly improved, and thus the prepared oil absorption material has good application prospect.

Description

technical field [0001] The invention relates to the fields of material science and environmental protection, in particular to a method for preparing a multilayer oil-absorbing material by using a vacuum spraying method. Background technique [0002] The pollution caused by oily waste water, waste liquid, and offshore oil spills has damaged the living conditions of the earth's organisms. The oil film pollution will cause serious damage to aquatic organisms. The oil film prevents oxygen from entering the water body, making the water body anoxic, and the oil is Washing up on the beach can also have a serious impact on the surrounding creatures. This just forces the mankind to urgently need to develop a large amount of excellent oil-absorbing materials. At present, most of the used oil-absorbing materials only contain a single layer of oil-absorbing material, and the absorbed oil is easily squeezed out, which makes the oil-retaining ability of these oil-absorbing materials poor...

AI Technical Summary

Problems solved by technology

Inorganic oil-absorbing substances include zeolite, diatomaceous earth, perlite, graphite, vermiculite, clay, and silica, which have a low adsorption capacity for non-polar organic substances; organic synthetic substances include polymeric materials polypropylene and polyurethane foam, due to their It has lipophilicity and hydrophobicity. Compared with other types of materials, it has better adsorption performance, easy to prepare and reuse, so it is a common material to deal with oil pollution. Its main disadvantage is that it is not biodegradable or the degradation rate is very fast. Slow; organic natural oil-absorbing substances include wheat straw, corn cob, wood fiber, cotton fiber, kenaf, bark and peat bog, etc., most of which have higher oil absorption rate than organic synthetic resin. However, its disadvantages are Poor buoyancy properties, absorbing oil as well as water

[0004] At present, there are many methods for preparing oil-absorbing materials, but most of the methods are difficult to prepare oil-absorbing materials with good quality, large area, no pollution, multi-layer structure and strong oil retention ability.