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Preparation method of super-hydrophobic particle/chitosan framework composite oil-absorption sponge

A technology of oil-absorbing sponge and chitosan, which is applied in the field of preparation of superhydrophobic oil-absorbing sponge, can solve the problems of low oil absorption rate and secondary pollution, and achieve the effects of low cost, convenient secondary recovery, and controllable experimental parameters

Active Publication Date: 2014-02-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chitosan is a kind of bio-environmental protection material. It has good biodegradability, is convenient for secondary recycling, does not cause secondary pollution, and has good oil absorption performance and recycling performance. It solves the oil absorption rate of existing oil absorption products low and cause secondary pollution, the superhydrophobic oil-absorbing material prepared by this method is expected to become a new direction for the development of oil-absorbing materials in the future

Method used

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  • Preparation method of super-hydrophobic particle/chitosan framework composite oil-absorption sponge
  • Preparation method of super-hydrophobic particle/chitosan framework composite oil-absorption sponge

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specific Embodiment approach 1

[0018] Specific implementation mode one: as figure 1 As shown, the present embodiment prepares chitosan superhydrophobic oil-absorbing sponge according to the following steps:

[0019] Step 1, prepare chitosan sponge by freeze-drying method

[0020] Chitosan powder was dissolved in acetic acid aqueous solution (2 wt %) to prepare a 0.1-10 wt % chitosan solution; the chitosan solution was transferred to an evaporating dish, the filter paper was covered on the upper part of the vessel, and sealed with scotch tape; Then it is placed in the cold steel rod on the top of the freeze dryer, cooled and completely frozen by liquid nitrogen, and the freezing temperature ranges from -5 to -60°C; the three-dimensional network chitosan is formed by freezing into ice crystals with water and drying to remove.

[0021] Step 2. Synthesis of superhydrophobic PMHOS (polymethylhydroxysiloxane)

[0022] Dissolve PMHS (2-100 g) in absolute ethanol (10-1000 mL), then add sodium hydroxide (0...

specific Embodiment approach 2

[0025] Specific embodiment two: present embodiment prepares chitosan superhydrophobic oil-absorbing sponge according to the following steps:

[0026] Step 1, prepare chitosan sponge by freeze-drying method

[0027] Chitosan powder (4g) is dissolved in the aqueous acetic acid solution (2wt%) of 200 milliliters, preparation chitosan solution (2wt%); Chitosan solution is transferred in the evaporating dish, filter paper is covered on vessel top, and with Sealed with scotch tape, then placed in the cold steel rod at the top, cooled and completely frozen by liquid nitrogen, the freezing temperature is -5°C; the three-dimensional network chitosan is formed by freezing into ice crystals with water and drying to remove them to form a three-dimensional network Chitosan backbone.

[0028] Step 2. Synthesis of superhydrophobic PMHOS (polymethylhydroxysiloxane)

[0029] PMHS (4.7 g, 78 mmol MeHSiO) was dissolved in absolute ethanol (70 mL), and then a solution of sodium hydroxid...

specific Embodiment approach 3

[0033] Specific embodiment three: present embodiment prepares chitosan superhydrophobic oil-absorbing sponge according to the following steps:

[0034] Step 1, prepare chitosan sponge by freeze-drying method

[0035] Chitosan powder (4 g) was dissolved in 200 ml of acetic acid aqueous solution (2 wt %) to prepare chitosan solution (2 wt %). Transfer the chitosan solution to an evaporating dish, cover the upper part of the vessel with filter paper, and seal it with scotch tape, then place it in a cold steel rod at the top, cool and completely freeze it with liquid nitrogen, and the freezing temperature is -20 °C. The three-dimensional network chitosan is formed by freezing water into ice crystals and drying to remove the three-dimensional network chitosan skeleton.

[0036] Step 2. Synthesis of superhydrophobic PMHOS (polymethylhydroxysiloxane)

[0037] PMHS (4.7 g, 78 mmol MeHSiO) was dissolved in absolute ethanol (70 mL), then sodium hydroxide (0.008 g, 0.2 mmol in ...

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Abstract

The invention discloses a preparation method of a super-hydrophobic particle / chitosan framework composite oil-absorption sponge and relates to a preparation method of a super-hydrophobic oil-absorption sponge. The preparation method of the super-hydrophobic oil-absorption chitosan sponge comprises the following steps: (1), preparing a chitosan three-dimensional network sponge by adopting a freeze-drying method; (2), synthesizing super-hydrophobic PMHOS (Polymethyl Hydroxyl Siloxane); and (3), assembling the super-hydrophobic PMHOS powder in the step (2) on the surface of three-dimension network shaped / chitosan to obtain the super-hydrophobic chitosan three-dimension network sponge. The chitosan three-dimensional network structure prepared by the preparation method disclosed by the invention is a three-dimensional network shaped sponge with a shape memory function, can be repeatedly compressed and released to have a function of absorbing liquid. The chitosan super-hydrophobic oil-absorption sponge prepared by the preparation method disclosed by the invention has area of 1 cm<2>-80 dm<3>, three-dimensional porous dimension of 0.5 mu m-1cm, and hydrophobic powder particle diameter of 0.1 mu m-50 mu m.

Description

technical field [0001] The invention relates to a preparation method of a superhydrophobic oil-absorbing sponge. Background technique [0002] With the increase of industrial oily wastewater discharge and the frequent occurrence of offshore oil spills, how to efficiently separate oil from water has become one of the current research hotspots. According to statistics, 3,000-5,000kt of oil spills into the sea due to various accidents in the world every year, which not only seriously destroys the ecological balance of the ocean, pollutes the environment, but also causes a great waste of energy. In recent years, studies have found that solid surfaces with both superhydrophobicity and superoleophilicity are an effective way to solve oil-water separation. The development direction of oil-absorbing agents is that the synthetic oil-absorbing speed is fast, the application area is wide, the source of raw materials is abundant, and it is biodegradable, which is not easy to cause seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J9/28C08L5/08
Inventor 刘宇艳张恩爽吕通王永臻刘少柱
Owner HARBIN INST OF TECH
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