A kind of cellulose-based tio2/β-cd double network gel cage microsphere and its preparation method and application
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A cellulose-based and cellulose technology, applied in the field of gel microspheres and its preparation, can solve the problems of high cost and non-recyclable use of adsorbents, and achieve good surface uniformity, long-term storage, and good water retention performance Effect
Inactive Publication Date: 2018-11-02
NORTHEAST FORESTRY UNIVERSITY
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[0006] The present invention aims to solve the problems of the high cost of methylene blue printing and dyeing wastewater treatment and the non-recyclable use of adsorbents, and provides a cellulose-based TiO 2 / β-CD double network gel cage microsphere and its preparation method and application
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specific Embodiment approach 1
[0042] Specific implementation mode 1: In this implementation mode, cellulose-based TiO 2 / β-CD double network gel cage microspheres are composed of hydroxyethyl cellulose, carboxymethyl cellulose, crosslinking agent, initiator, TiO 2 / β-CD complex suspension and deionized water; wherein the mass ratio of hydroxyethyl cellulose and carboxymethyl cellulose is (6-8): (2-4), and the mass ratio of hydroxyethyl cellulose The volume ratio of mass to cross-linking agent is (0.6-0.8) g: (3-5) mL, and the volume ratio of hydroxyethyl cellulose to initiator is (0.6-0.8) g: (3-5) mL , the mass of hydroxyethyl cellulose and TiO 2 The volume ratio of / β-CD complex suspension is (0.6~0.8)g: (10~15)mL, the volume ratio of the mass of hydroxyethyl cellulose to deionized water is (0.6~0.8)g:( 10-20) mL.
specific Embodiment approach 2
[0043] Embodiment 2: This embodiment is different from Embodiment 1 in that: the crosslinking agent is epichlorohydrin. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0044] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the initiator is 10 mol / L NaOH solution. Others are the same as in the first or second embodiment.
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Abstract
The invention discloses a cellulose base TiO2 / beta-CD dual-net gel cage microsphere and a preparation method and application thereof, relates to a gel microsphere and a preparation method and application thereof, and aims at solving the problems that the existing cost for treating methylene blue printing and dyeing wastewater is high and an adsorbent cannot be recycled. The microsphere is prepared from hydroxyethyl cellulose, carboxymethyl cellulose, a cross-linking agent, an initiating agent, TiO2 / beta-CD compound turbid liquid and deionized water. The method comprises the steps of preparing the TiO2 / beta-CD compound turbid liquid; dissolving the hydroxyethyl cellulose and the carboxymethyl cellulose into water to obtain cellulose mixed liquid; mixing NaOH solution, the cellulose mixed liquid, the compound turbid liquid and epoxy chloropropane, and reacting to obtain mixed liquid; putting liquid paraffin into a beaker, stirring, dropwise adding the mixed liquid into the liquid paraffin, curing and forming to obtain a cellulose gel sphere; cleaning, dialyzing and drying to obtain the microsphere. The microsphere is used as an adsorbent for purifying industrial printing and dyeing wastewater containing methylene blue.
Description
technical field [0001] The invention relates to a gel microsphere and its preparation method and application. Background technique [0002] Cellulose is a linear polymer composed of D-glucopyranose rings linked by β-1,4-glycosidic bonds, and is widely found in natural organisms such as wood, cotton, wheat straw, reed, hemp, and rice straw. As the most abundant renewable resource on earth, cellulose has the advantages of non-toxic, harmless, biodegradable, and good biocompatibility. Cellulose is insoluble in water and is difficult to dissolve in general organic solvents (such as toluene, acetone, ether, ethanol), but by modifying the hydroxyl groups on the cellulose chain, many water-soluble cellulose derivatives can be obtained, such as hydroxyl Ethyl cellulose, methyl cellulose, carboxymethyl cellulose, hydroxypropyl methyl cellulose, etc. These celluloses are widely used in food, medicine, chemical industry, petroleum, etc. because of their low manufacturing cost and exce...
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