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Regenerated cellulose microsphere containing flower-like nanometer ZnO and preparation method thereof

A technology for regenerating cellulose and cellulose, applied in chemical instruments and methods, special compound water treatment, water/sludge/sewage treatment, etc. The preparation process is clean and environmentally friendly, improving high-value utilization, and improving the effect of difficult recycling

Active Publication Date: 2018-11-27
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, commonly used inorganic carriers include silica, diatomaceous earth, alumina, carbon materials, etc. Inorganic carriers have the characteristics of high density (generally only suitable for fixed bed reactors), which limits their application in photocatalytic engineering; Organic polymer carriers include polyethylene, etc., which have low density and are not only suitable for fixed-bed reactors, but also for suspended-bed reactors, but petroleum-based polymers are not easy to degrade and regenerate, and have poor environmental friendliness

Method used

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  • Regenerated cellulose microsphere containing flower-like nanometer ZnO and preparation method thereof
  • Regenerated cellulose microsphere containing flower-like nanometer ZnO and preparation method thereof
  • Regenerated cellulose microsphere containing flower-like nanometer ZnO and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] 2g of wood pulp cellulose fibers were added to 100g of 70% (wt%) ZnCl 2 In aqueous solution, pretreatment in a low-temperature bath at 0°C for 3 hours. The above liquid-solid material was placed in a water bath at 70° C. and heated and stirred to obtain a transparent and uniform cellulose solution. Use a syringe to dissolve the ZnCl of cellulose 2 The aqueous solution was injected into a 50% NaOH aqueous solution in the form of pellets, and allowed to stand for 12 hours. Filter the pellet and wash the pellet with distilled water until Cl-free - , put it into an ultra-low temperature refrigerator, and put the sample in a freeze dryer after freezing. After drying, a new material of regenerated cellulose pellets containing flower-like nano-ZnO was obtained. The characterization results are as follows Figure 1~6 shown. Depend on figure 1 It can be seen that the diameter of the pellets is 2-4 mm. Depend on figure 2 It can be seen that the surface of the pellet is ne...

Embodiment 2

[0029] 2g of wood pulp cellulose fibers were added to 60g of 65% (wt%) ZnCl 2 In aqueous solution, pretreatment in a low-temperature bath at -10°C for 4 hours. The above liquid-solid material was placed in a water bath at 70° C. and heated and stirred to obtain a transparent and uniform cellulose solution. Use a syringe to dissolve the ZnCl of cellulose 2 The aqueous solution was injected into a 50% NaOH aqueous solution in the form of pellets, and allowed to stand for 14 hours. Filter the pellet and wash the pellet with distilled water until Cl-free - , put it in an ultra-low temperature refrigerator, and place the sample in a freeze dryer after freezing. After drying, a new material of regenerated cellulose pellets containing flower-shaped nano ZnO is obtained. The diameter of the ball is 2-4mm, and the thickness of the petal is about 100-200nm.

Embodiment 3

[0031] 2g of cotton pulp cellulose fibers were added to 120g of 65% (wt%) ZnCl 2 In aqueous solution, pretreatment in a low-temperature bath at -10°C for 4 hours. The above liquid-solid material was placed in a water bath at 80° C. and heated and stirred to obtain a transparent and uniform cellulose solution. Use a syringe to dissolve the ZnCl of cellulose 2 The aqueous solution was injected into a 50% NaOH aqueous solution in the form of pellets and allowed to stand for 16 hours. Filter the pellet and wash the pellet with distilled water until Cl-free - , put it in an ultra-low temperature refrigerator, and place the sample in a freeze dryer after freezing. After drying, a new material of regenerated cellulose pellets containing flower-shaped nano ZnO is obtained. The diameter of the ball is 2-4mm, and the thickness of the petal is about 100-200nm.

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Abstract

The invention discloses a regenerated cellulose microsphere containing flower-like nanometer ZnO and a preparation method thereof. According to the novel regenerated cellulose microsphere, the thickness of petaline nanometer ZnO is 100-200 nm, and the diameter of the regenerated cellulose microsphere is 2-4 mm. According to the preparation method, a ZnCl2 water solution is adopted as a solvent forcellulose and a zinc source of nanometer ZnO, and dissolving pulp cellulose fibers are adopted as the raw materials of cellulose and subjected to low-temperature pretreatment, dissolution, injectioninto a ball shape, in-situ synthesis and freeze drying to prepare the regenerated cellulose microsphere containing flower-like nanometer ZnO. A preparation process is clean, environmentally friendly and capable of saving energy; through in-situ synthesis, the regenerated cellulose microsphere containing flower-like nanometer ZnO is prepared without a hydrothermal reaction or heating, flower-like nanometer ZnO is mainly distributed in the regenerated cellulose microsphere and cannot shed, and the regenerated cellulose microsphere has wide application in light-catalyzed reactions.

Description

technical field [0001] The invention belongs to the technical field of new cellulose materials, and in particular relates to a new material of regenerated cellulose pellets containing flower-shaped nano ZnO and a preparation method thereof. Background technique [0002] Compared with traditional sewage treatment technology, photocatalytic technology has the advantages of high efficiency, energy saving, easy operation, simplified process, clean and non-toxic, and no secondary pollution. Some commonly used photocatalytic materials are mainly semiconductor materials, and nano-ZnO is one of the materials with broad application prospects. However, it is difficult to recycle in application, so it needs to be compounded with a certain carrier to improve its utilization efficiency. [0003] At present, commonly used inorganic carriers include silica, diatomaceous earth, alumina, carbon materials, etc. Inorganic carriers have the characteristics of high density (generally only suita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J35/08C02F1/32
CPCC02F1/32B01J31/26C02F2305/10B01J35/51B01J35/39
Inventor 李小保高亚年周小龙张雪李力成叶菊娣
Owner NANJING FORESTRY UNIV
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