Salix psammophila cellulose nanofibers, aerogel ball, preparation and application

A nanofiber and cellulose technology, applied in the field of nanocellulose modification, can solve the problems of polluting environmental resources, troublesome treatment, low utilization rate, etc., and achieves the effects of high activity, preventing self-aggregation, and improving adsorption effect.

Active Publication Date: 2021-12-28
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biomass resources such as plant stalks, fungus chaff, soybean meal and corn husks are abundant, but their utilization rate is low, and the processing is troublesome and costly. If not handled properly, it will not only pollute the environment but also cause a great waste of resources

Method used

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  • Salix psammophila cellulose nanofibers, aerogel ball, preparation and application
  • Salix psammophila cellulose nanofibers, aerogel ball, preparation and application
  • Salix psammophila cellulose nanofibers, aerogel ball, preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] This embodiment provides a salix microcrystalline cellulose, which is prepared according to a preparation method comprising the following specific steps:

[0107] (1) Weigh 10 g of Salix salix powder, add it into distilled water at a ratio of 1:60 (mass volume ratio, units are g and mL), and heat at 80°C for 1 h to remove surface impurities and part of the water-soluble components, and then the resulting solution was filtered, and the filtered filtrate was dried at 105°C to obtain a dried sample with a yield of 87%;

[0108] (2) The dried sample of step (1) is placed in a three-necked flask, and nitric acid ethanol solution (1:3v / v) is added into the three-necked flask, wherein, the mass of the dried sample and nitric acid ethanol solution The volume ratio is 1:43, the units are g and mL respectively, condensed and refluxed at 90°C, the sample is taken out, washed with distilled water and absolute ethanol until neutral, and dried at 105°C to constant weight; among them,...

Embodiment 2

[0115] This embodiment provides a series of salix cellulose nanofibers, which are prepared according to the preparation method comprising the following specific steps:

[0116] 1) the Salix microcrystalline cellulose (as Figure 17 Shown), TEMPO, sodium bromide, and salix microcrystalline cellulose, TEMPO and sodium bromide and 100mL distilled water are placed in the 250mL three-necked flask, stirred for 30min, and then added sodium hypochlorite solution (effectively Chlorine mass content is 10%)), and the pH of solution is adjusted between 10.0-10.5 with the sodium hydroxide solution of 0.5mol / L, keeps this pH range until reaction finishes and adds 20mL anhydrous methanol termination reaction; Wherein, TEMPO / NaBr / NaClO oxidation mechanism diagram Figure 9 Shown, step 1) obtained salix microcrystalline cellulose sample after oxidation is as Figure 18 shown;

[0117] 2) Adjust the pH value of the oxidized Salix microcrystalline cellulose solution obtained in step 1) to 10...

Embodiment 3

[0133] This embodiment provides a series of Salix microcrystalline cellulose / Sawillow cellulose nanofiber airgel balls, which are prepared according to the preparation method comprising the following specific steps:

[0134] 1. Weigh 4g of Salix microcrystalline cellulose prepared in Example 1 and 6.672g of sodium hydroxide, and dissolve the two in 77.76mL of distilled water, stir until the cellulose solution is in a homogeneous state, and then add 11.52 g of thiourea, stir again until the thiourea dissolves and place the gained solution in a -12.5°C refrigerator to refrigerate, take out and obtain a salix microcrystalline cellulose solution with a concentration of 4wt%;

[0135] 2. Take the salix microcrystalline cellulose solution prepared in step 1 of a certain quality and combine it with the salix cellulose nanofiber (TOCNF prepared under preferred conditions in Example 2) aqueous solution with a concentration of 0.05 mg / mL (g) Mix well, and then use a 5mL syringe to add t...

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Abstract

The invention provides salix mongolica cellulose nanofibers, an aerogel ball, preparation and application. The aerogel ball is a porous net-shaped sphere formed by compounding salix mongolica microcrystalline cellulose and the salix mongolica cellulose nanofibers, and the salix mongolica cellulose nanofibers are uniformly dispersed in internal pores of the aerogel ball; or the aerogel ball is a porous net-shaped sphere formed by salix mongolica microcrystalline cellulose. As a novel heavy metal ion wastewater adsorbent with low cost, good biocompatibility and high efficiency, the salix mongolica microcrystalline cellulose / salix mongolica cellulose nanofiber aerogel ball provided by the invention has the advantages of simple preparation method, environmental friendliness and the like, and has remarkable affinity and adsorptive selectivity to heavy metal ions in wastewater.

Description

technical field [0001] The invention relates to salix cellulose nanofibers, airgel balls and their preparation and application, and belongs to the technical field of conversion of biomass cellulose to nanocellulose and modification of nanocellulose. Background technique [0002] The Inner Mongolia Autonomous Region is an important metallurgical industrial base in the country. Its iron ore, non-ferrous metals and rare metal mineral resources are abundant, and its heavy chemical industry is relatively developed. However, a large amount of wastewater containing heavy metal pollutants is produced in the whole region every year, which poses a serious threat to the healthy survival of residents and aquatic organisms and the development of local industrial economy. Therefore, how to ensure the advantages of our district as a vast resource production and processing base, continuously develop the mining, smelting and processing industries of mineral resources, and prevent and control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08J9/28C08L1/04C08B15/04B01J13/00B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCC08B15/04C08J3/12C08J9/28B01J13/0091B01J20/28047B01J20/28019B01J20/28007B01J20/24B01J20/28057C02F1/281C02F1/285C02F2101/20C02F2101/206C08J2301/04C08J2201/0482
Inventor 张晓涛钟源王喜明王雅梅王克冰安宇宏张万奇胡子雏王晓王博赟
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY
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