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A kind of preparation method of bamboo pulp cellulose & poly n-vinyl formamide composite flocculation decolorization material

A technology of vinylformamide and cellulose, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve unseen problems, achieve low prices, reduce production costs, and achieve significant decolorization effects

Inactive Publication Date: 2018-12-18
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Up to now, there has been no related technology for the preparation of composite flocculation and decolorization materials using bamboo pulp cellulose and poly N-vinyl formamide as basic raw materials.

Method used

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  • A kind of preparation method of bamboo pulp cellulose & poly n-vinyl formamide composite flocculation decolorization material
  • A kind of preparation method of bamboo pulp cellulose & poly n-vinyl formamide composite flocculation decolorization material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Cutting the white bamboo pulp board, washing it with water, drying, crushing, and filtering through a 200-mesh sieve to obtain white bamboo cellulose with a particle size of 0.07 mm;

[0022] 2) Weigh the cellulose obtained in step 1), dissolve it in a mixed solution containing 7% NaOH and 13% urea, seal it and place it in a -25°C environment and freeze it for 1.5 hours, wherein the cellulose The mass ratio with sodium hydroxide is 1:1.5, and the mass ratio of cellulose and urea is 1:3.5 to obtain a colorless, transparent cellulose solution;

[0023] 3) Nitrogen gas was passed through the cellulose solution obtained in step 2) for 30 minutes, and the initiator ammonium persulfate was added. The mass ratio of cellulose and ammonium persulfate was 1:0.25, and the reaction was carried out for 15 minutes to obtain the initiated cellulose solution. Phyllostachys cellulose solution;

[0024] 4) Add grafting monomer poly-N-vinyl formamide to the induced cellulose solution ...

Embodiment 2

[0027] 1) cutting, washing, drying and crushing the Cizhu pulp board, and filtering through a 150-mesh sieve to obtain Cizhu cellulose with a particle size of 0.1 mm;

[0028] 2) Weigh the Cizhu cellulose obtained in step 1), dissolve it in a mixed solution containing 6% NaOH and 15% urea, seal it and place it in a -20°C environment and freeze it for 2 hours, wherein the Cizhu cellulose is oxidized with hydrogen The mass ratio of sodium is 1:2, the mass ratio of Cizhu cellulose to urea is 1:2.5, and a colorless, transparent Cizhu cellulose solution is obtained;

[0029] 3) Pass nitrogen to the Cizhu cellulose solution obtained in step 2) for 35 minutes, add initiator ammonium persulfate, the mass ratio of Cizhu cellulose to ammonium persulfate is 1:0.2, and react for 10 minutes to obtain the initiated Cizhu fiber prime solution;

[0030] 4) Add grafting monomer poly-N-vinyl formamide to step 3) in the initiated Cizhu cellulose solution, wherein the mass ratio of Cizhu cellulo...

Embodiment 3

[0033]1) cutting the green bamboo pulp board, washing it with water, drying, crushing, and filtering through a 100-mesh sieve to obtain green bamboo cellulose with a particle size of 0.14 mm;

[0034] 2) Weigh the green bamboo cellulose obtained in step 1), dissolve it in a mixed solution containing 8% NaOH and 10% urea, seal it and place it in a -30°C environment for freezing for 1 hour, wherein the green bamboo cellulose and The mass ratio of sodium hydroxide is 1:1.8, and the mass ratio of green bamboo cellulose and urea is 1:3, obtains colorless, transparent green bamboo cellulose solution;

[0035] 3) To the green bamboo cellulose solution obtained in step 2), pass nitrogen gas for 40 min, add initiator ammonium persulfate, the mass ratio of green bamboo cellulose to ammonium persulfate is 1:0.3, react for 20 min, and obtain the initiated Green bamboo cellulose solution;

[0036] 4) Add grafting monomer poly-N-vinyl formamide to step 3) in the initiated green bamboo cell...

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Abstract

The invention discloses a preparation method of a bamboo-pulp cellulose and poly(N-vinylformamide) composite flocculating and decolorizing material. Key points of the adopted method lie in that a bamboo-pulp pulp board is subjected to shearing off, water scrubbing, drying and pulverization treatments to pulverize cellulose; a refrigeration treatment is carried out by adopting sodium hydroxide and a urea solution to dissolve the cellulose; the graft copolymerization between the dissolved cellulose and poly(N-vinylformamide) is initiated through free radicals to prepare and obtain a composite flocculating and decolorizing material product. The preparation method of the bamboo-pulp cellulose and poly(N-vinylformamide) composite flocculating and decolorizing material uses the bamboo-pulp cellulose as a raw material while guaranteeing that the product has favorable flocculation and decolorization effects, expands the range of raw materials for preparing the flocculating and decolorizing material, not only can decrease production cost and improve economic benefit, but also can broaden an application field of a bamboo-pulp fiber, increases the added value of the product, and has obvious social benefit and economic benefit.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a bamboo pulp cellulose & poly N-vinyl formamide composite flocculation decolorization material. Background technique [0002] Flocculation is a very important part of water treatment. Flocculants play an important role in water and wastewater treatment and solid-liquid separation in the production process. The selection and use of flocculants are directly related to the quality of the flocculation effect. Since the 1960s, organic polymer flocculants have gradually replaced inorganic metal flocculants, and are widely used in chemical, metallurgy, coal, textile, paper, petroleum and other production fields. With the research and development of organic polymer flocculants and people's demand for more environmentally friendly and sustainable chemical technologies, natural polymer flocculants have attracted more and more attention from s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56
CPCC02F1/56
Inventor 张勇王卫杰陈玮杨晓刚姚菊明
Owner ZHEJIANG SCI-TECH UNIV
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