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Cellulose-based porous composite material and preparation method and purpose thereof

A composite material and cellulose technology, applied in chemical instruments and methods, other chemical processes, water treatment of special compounds, etc., to achieve good adsorption performance and photocatalytic activity, short production cycle, and high specific surface area

Inactive Publication Date: 2016-12-07
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN201310650189.4 discloses a preparation method of cellulose foam material, but the use of a single component material makes it more or less deficient in physical and chemical properties

Method used

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  • Cellulose-based porous composite material and preparation method and purpose thereof
  • Cellulose-based porous composite material and preparation method and purpose thereof
  • Cellulose-based porous composite material and preparation method and purpose thereof

Examples

Experimental program
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Embodiment 1

[0025] 8.34g of wood pulp (molecular weight 1.0×10 5 ) into 200 g of a solution precooled to -12.0° C. and containing 7 wt % NaOH and 12 wt % urea, stirred rapidly for 5 min, and defoamed by a high-speed centrifuge to obtain a cellulose solution with a concentration of 4 wt %. Add 2wt% sodium lauryl sulfate and 25wt% TiO 2 Powder, stirred at 5000rad / min for 10min, then poured the mixed solution into a beaker, kept it in an oven at 60°C for 8 hours, then soaked and washed it with deionized water, and freeze-dried the resulting cellulose-based porous composite material marked as 4%Cellu-2%Surf-25%TiO 2 . The wet compressive strength and dry compressive strength of the composite material are above 0.26MPa and 2.43MPa respectively, which has good mechanical properties and a high specific surface area (94m 2 / g). figure 1 The scanning electron microscope (SEM) image in shows that the material contains a large number of micro- and nano-scale voids, high porosity (greater than 85...

Embodiment 2

[0027] 8.34g of wood pulp (molecular weight 1.0×10 5 ) into 200 g of a solution precooled to -12.0° C. and containing 7 wt % NaOH and 12 wt % urea, stirred rapidly for 5 min, and defoamed by a high-speed centrifuge to obtain a cellulose solution with a concentration of 4 wt %. Add 2wt% sodium lauryl sulfate and 25wt% activated carbon powder (specific surface area 1000m 2 / g), stirred at 5000rad / min for 10min, then poured the mixed solution into a beaker, kept it in an oven at 60°C for 8 hours, then soaked and washed it with deionized water, and freeze-dried the obtained cellulose-based porous composite material to mark For 4% Cellu-2% Surf-25% AC. The wet compressive strength and dry compressive strength of the composite material are above 0.30MPa and 2.57MPa respectively, which has good mechanical properties and a high specific surface area (353m 2 / g). figure 2The scanning electron microscope (SEM) picture in shows that the material contains a large number of micro- and ...

Embodiment 3

[0029] 8.34g of wood pulp (molecular weight 1.0×10 5 ) into 200 g of a solution precooled to -12.0° C. and containing 7 wt % NaOH and 12 wt % urea, stirred rapidly for 5 min, and defoamed by a high-speed centrifuge to obtain a cellulose solution with a concentration of 4 wt %. Add 2wt% sodium lauryl sulfate and 25wt% TiO 2 / Activated carbon composite powder (mass ratio 1:1), stirred at 5000rad / min for 10min, then poured the mixed solution into a beaker, kept it in a 60°C oven for 8 hours, then soaked and washed it with deionized water, and freeze-dried The resulting cellulose-based porous composite was labeled 4% Cellu-2% Surf-25% TiO 2 / AC. The wet compressive strength and dry compressive strength of the composite material are above 0.29MPa and 2.44MPa respectively, which has good mechanical properties and a high specific surface area (182m 2 / g). figure 1 The scanning electron microscope (SEM) image in shows that the material contains a large number of micro- and nano-sc...

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Abstract

The invention discloses a cellulose-based porous composite material and a preparation method and a purpose thereof. The cellulose-based porous composite material comprises the following raw materials of cellulose, a surface active agent, a photocatalysis nanometer material and an activated carbon compound additive. The preparation method comprises the following steps of dissolving the cellulose into a solvent, and fully stirring, so as to obtain a cellulose solution; adding the surface active agent, the photocatalysis nanometer material and the activated carbon compound additive, mechanically and forcibly stirring, and drying in an oven; taking out a sample, soaking and washing in deionized water, and drying, so as to obtain the cellulose-based porous composite material. The prepared cellulose-based porous composite material has the advantages that the strength is high, the density is low, and rich pores and multiple shapes are realized; the adsorbing property and photocatalysis activity are good; the application prospect is good in the environment-protection fields of adsorbing and purifying of waste gas and waste water, and the like. The preparation method has the advantages that the technology is simple, the cost is low, the conditions are controllable, the preparation cycle is short, special equipment is not needed, the preparation method is suitable for large-scale production, and the like.

Description

technical field [0001] The invention belongs to the field of environmental protection materials, and in particular relates to a cellulose-based porous composite material and its preparation method and application. Background technique [0002] Over the past 40 years, while my country's economy has maintained rapid growth, the environment has also been severely challenged. Air pollution, river pollution, and soil pollution are seriously threatening people's life and health. Therefore, environmental pollution has become a major obstacle restricting the sustainable development of my country's economy. Photocatalytic advanced oxidation technology is currently a kind of environmental treatment technology that has attracted much attention. It has the characteristics of environmental friendliness, cheap economy, and chemical stability. However, in order to achieve industrial application of this technology, problems such as performance improvement, catalyst separation, and carrier ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J31/38B01J31/06B01D53/02C02F1/28C02F1/30
CPCB01D53/02B01J20/24C02F1/288C02F1/30B01J31/06B01J31/38C02F2305/10B01J35/39
Inventor 庄建东田勤奋范毜仔卢合欢崔秀容李燃
Owner FUJIAN AGRI & FORESTRY UNIV
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