Preparation method of green metal absorbing material with cellulose and sericin

An adsorption material, green metal technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of non-biodegradability, high production cost, secondary pollution, etc., and achieve rapid hydrolysis reaction, rapid process, and mild reaction conditions. Effect

Inactive Publication Date: 2015-06-24
ZHEJIANG SCI-TECH UNIV
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  • Description
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Problems solved by technology

[0006] In order to overcome the problems of toxicity, secondary pollution, high production cost, non-biodegradable and other problems of traditional metal adsorption materials, and at the same time resource utilization of renewable and fu...

Method used

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  • Preparation method of green metal absorbing material with cellulose and sericin
  • Preparation method of green metal absorbing material with cellulose and sericin

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 1) Grind 1 g of bamboo pulp board with a plant grinder, filter through a 120-mesh screen to obtain bamboo pulp powder with a particle size of 0.12 mm or less, add it to the mixed solution of sodium hydroxide and urea pre-frozen at 2°C, and stir Mix evenly for 6 minutes, wherein the mass fractions of sodium hydroxide and urea are 6 wt% and 13 wt%, respectively, and the mass ratio of sodium hydroxide and urea mixed solution to bamboo pulp board is 55:1, and placed at -14 °C Freeze for 1 h under the same conditions to obtain a uniform and transparent bamboo pulp cellulose solution;

[0023] 2) Thaw the bamboo pulp cellulose solution obtained in step 1) at room temperature, add the oxidizing agent sodium periodate to shading oxidation for 4 h in a water bath at 60°C, and the mass ratio of sodium periodate to bamboo pulp board is 1:1 , to obtain dialdehyde cellulose solution;

[0024] 3) Weigh 1 g of sericin with a molecular weight of 8k Da, add it to 20 mL pH 4.5 acetate b...

Embodiment 2

[0027] 1) Grind 1 g of mottled bamboo pulp with a plant pulverizer, filter through a 120-mesh screen to obtain bamboo pulp powder with a particle size of 0.12 mm or less, add it to a mixed solution of sodium hydroxide and urea pre-frozen at 2°C, and stir for 6 min to make it mix evenly, wherein the mass fractions of sodium hydroxide and urea are 7 wt% and 12 wt% respectively, and the mass ratio of sodium hydroxide and urea mixed solution to mottled bamboo pulp board is 25: 1, placed under the condition of -14°C Freeze for 4 h to obtain a uniform and transparent bamboo pulp cellulose solution;

[0028] 2) The bamboo pulp cellulose solution obtained in step 1) was thawed at room temperature, and the oxidant sodium periodate was added to shading oxidation for 3 h in a water bath at 50°C. The mass ratio of sodium periodate to mottled bamboo pulp board was 0.5:1, and the obtained Dialdehyde cellulose solution;

[0029] 3) Weigh 0.5 g of sericin with a molecular weight of 2k Da, ad...

Embodiment 3

[0032] 1) Grind 1 g of moso bamboo pulp with a plant grinder, filter through a 120-mesh sieve to obtain bamboo pulp powder with a particle size of 0.12 mm or less, add it to the mixed solution of sodium hydroxide and urea pre-frozen at 2 °C, and stir for 6 min to make it mix evenly, wherein the mass fractions of sodium hydroxide and urea are 8 wt% and 11 wt% respectively, the mass ratio of sodium hydroxide and urea mixed solution to moso bamboo pulp board is 40: 1, and placed under the condition of -14°C Freeze for 2 h to obtain a uniform and transparent bamboo pulp cellulose solution;

[0033] 2) The bamboo pulp cellulose solution obtained in step 1) was thawed at room temperature, and the oxidant sodium periodate was added to shading oxidation for 2 h in a water bath at 45°C, wherein the mass ratio of sodium periodate to moso bamboo pulp board was 0.65:1 to obtain Dialdehyde cellulose solution;

[0034]3) Weigh 1.5 g of sericin with a molecular weight of 5w Da, add it to 25...

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Abstract

The invention discloses a preparation method of a green metal absorbing material with cellulose and sericin. The preparation method has the key points that the cellulose and the sericin protein of bamboo are utilized and the green metal absorbing material with high absorbing efficiency and full biodegradation is prepared by molecular design and chemical modification. The preparation method is simple, high-efficiency and no-pollution. The green metal absorbing material has the advantages that the cellulose and the sericin protein of the bamboo are introduced into raw materials for preparing the metal absorbing material, the range of the raw materials for preparing the metal absorbing material is expanded, an innovative idea for recycling the cellulose and the serich protein of the bamboo is provided, the breakthrough of the technical problem at the section of removing metal ions in industrial and domestic waste water is accelerated and great environmental and social benefits are achieved.

Description

technical field [0001] The invention relates to a preparation method of a green metal adsorption material, in particular to a preparation method of a cellulose & sericin green metal adsorption material, which belongs to the technical field of organic polymer materials. Background technique [0002] At present, in industrial and domestic wastewater treatment technology, the removal of metal ions has always been the most critical link. On the one hand, the removal efficiency of metal ions has always been an important indicator of the reuse rate of wastewater in various industries; on the other hand, the discharge of wastewater containing metal ions will cause serious damage to the water environment, and organisms will absorb metal ions from the environment. Food chain amplification, enrichment in advanced organisms, after entering the human body, interact with physiological macromolecular substances to inactivate them or accumulate in the human body to cause chronic poisoning....

Claims

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Application Information

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Owner ZHEJIANG SCI-TECH UNIV
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