Wood fiber-based composite sponge and preparation method thereof

A technology of composite sponge and wood fiber, applied in the field of wood fiber-based composite sponge and its preparation, can solve the problem of not excavating the potential value of wood at a deeper level, and achieve enhanced photocatalytic activity, high adsorption efficiency and high use value. Effect

Inactive Publication Date: 2021-04-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the development and utilization of wood is processed on a macro scale, but these do not dig deeper into the potential value of wood

Method used

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  • Wood fiber-based composite sponge and preparation method thereof
  • Wood fiber-based composite sponge and preparation method thereof
  • Wood fiber-based composite sponge and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Clean a certain volume of wood with deionized water, and use ultrasonic treatment to remove impurities for later use; dissolve sodium sulfite and sodium hydroxide with a mass ratio of 1:1 in 50ml of deionized water, and place the cleaned wood in the solution Heat in a water bath at 60°C for 1 hour to remove most of the lignin, and clean the surface residue with deionized water after the wood is taken out;

[0044](2) Add the cleaned wood to hydrogen peroxide and sodium chlorite with a mass ratio of 1:2 into 200ml of deionized water, add acetic acid dropwise to adjust the pH of the solution to 4, heat in a water bath at 60°C, and heat for 2 hours. Magnetically stirred at 1000 rpm, washed with deionized water until neutrally filtered, and finally freeze-dried for 48 hours.

[0045] (3) The obtained wood-derived fibers were added to deionized water, and bismuth nitrate pentahydrate and deionized water at a mass ratio of 1:100 were added, and then the mixed solution was...

Embodiment 2

[0048] (1) Wash a certain volume of wood with deionized water, and use it to remove impurities after ultrasonic treatment; dissolve sodium sulfite and sodium hydroxide with a mass ratio of 1:2 in 100ml of deionized water, and place the cleaned wood in the solution Heat in a water bath at 70°C for 2 hours to remove most of the lignin, and clean the surface residue with deionized water after the wood is taken out;

[0049] (2) Add the cleaned wood to hydrogen peroxide and sodium chlorite with a mass ratio of 1:2 into 200ml of deionized water, add acetic acid dropwise to adjust the pH of the solution to 4, heat in a water bath at 70°C, and heat for 4 hours. Magnetically stirred at 1500 rpm, washed with deionized water until neutrally filtered, and finally freeze-dried for 48 hours.

[0050] (3) The obtained wood-derived fibers were added to deionized water, and bismuth nitrate pentahydrate and deionized water at a mass ratio of 1:75 were added, and then the mixed solution was mag...

Embodiment 3

[0053] (1) Wash a certain volume of wood with deionized water, and use ultrasonic treatment to remove impurities for later use; dissolve sodium sulfite and sodium hydroxide with a mass ratio of 1:3 in 150ml of deionized water, and place the cleaned wood in the solution Heat in a water bath at 80°C for 3 hours to remove most of the lignin, and clean the surface residue with deionized water after the wood is taken out;

[0054] (2) Add the cleaned wood to hydrogen peroxide and sodium chlorite with a mass ratio of 1:3 into 300ml deionized water, add acetic acid dropwise to adjust the pH of the solution to 4, heat in a water bath at 80°C for 5 hours, Stir magnetically at 2000 rpm, wash with deionized water until neutral filtration, and finally freeze-dry for 48 hours.

[0055] (3) The obtained wood-derived fibers were added to deionized water, and bismuth nitrate pentahydrate and deionized water at a mass ratio of 1:25 were added, and then the mixed solution was magnetically stirr...

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Abstract

According to wood fiber-based composite sponge and a preparation method thereof, wood is used as a raw material, lignin is removed through sodium hydroxide and sodium sulfite, white wood fibers are prepared by combining methods of sodium chlorite, hydrogen peroxide oxidation and the like, the wood fibers are dissolved in deionized water, bismuth nitrate pentahydrate is added, a potassium bromide solution is dispersed into the solution, and then freeze-drying is performed to obtain fiber sponge; and the composite sponge shows super hydrophilicity and underwater super lipophobicity, selectively separates layered oil/water mixtures, can also be used for separating oil-in-water emulsion and adsorbing water-soluble organic pollutants at the same time, and is high in separation efficiency and adsorption efficiency. The regenerated composite sponge still has excellent reusability and efficient emulsion separation and dye adsorption performance.

Description

technical field [0001] The invention belongs to the technical field of material preparation, relates to the field of green fiber materials and environment-friendly materials, in particular to a wood fiber-based composite sponge and a preparation method thereof. Background technique [0002] Water is an essential resource and plays an important role in human life. However, with the rapid development of global industrialization, serious water pollution has caused great threats to human beings and the environment. Treating wastewater with complex pollutants, especially emulsified oils and organic dyes, is urgent and challenging. The tricky thing is that emulsified oil / water mixtures with complex components are more difficult to solve, because the surfactant has amphiphilicity between water and oil molecules, resulting in multi-molecular interactions. On the other hand, organic dyes such as rhodamine B (RhB) and methyl orange (MO) are resistant to aerobic digestion and stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J31/26C02F1/28C02F1/30C02F101/30
CPCB01J31/26B01J35/004B01J20/24B01J20/0259B01J20/0288B01J20/28028C02F1/288C02F1/30C02F2101/30C02F2101/308C02F2305/10
Inventor 杨进宋浩杰宋飞贾晓华李永王思哲
Owner SHAANXI UNIV OF SCI & TECH
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