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Preparation method of bagasse microspheres

A technology of bagasse and bagasse powder, which is applied in the field of chemical engineering, can solve the problems of small specific surface adsorption area, poor pore structure, and difficult filling, so as to increase specific surface area, improve permeability and liquid fluidity, and enhance adsorption Effects on performance and application performance

Inactive Publication Date: 2019-06-07
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that the physical shape of natural cellulose is powder or fiber, the pore structure is poor, the liquid flow resistance is large, the specific surface adsorption area is small, and the filling is difficult, which greatly limits its application.

Method used

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  • Preparation method of bagasse microspheres
  • Preparation method of bagasse microspheres
  • Preparation method of bagasse microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The method for preparing bagasse microspheres in this embodiment has the following steps:

[0031] Bagasse→crushing→passing through a 40-mesh sieve→bagasse powder→full soaking in water→filtering water→bagasse using HNO 3 Solution processing → filtering and washing to remove soluble impurities → bagasse is treated with NaOH solution → filtering and washing to remove soluble impurities → bagasse is treated with acetic acid / sodium chlorite mixed solution → filtering and washing to remove soluble impurities → bagasse → mixed with NaOH / Mix the urea solution evenly → freeze and dissolve alternately → transparent colloidal solution → add frozen glutaraldehyde → stir and mix → freeze and stand for modification → slowly add to the containing Span-80 (Span-80) under rapid stirring in the ice bath In palm oil→stirring in ice bath→stirring at room temperature (28~32℃)→adjusting pH→stationary precipitation→separating palm oil→collecting bagasse microspheres→washing with ethanol sol...

Embodiment 2

[0042] The rest of the method for preparing bagasse microspheres in this example is the same as in Example 1, except that 1mol / L of HCl and HNO are used respectively. 3 Process bagasse according to step S3 and step S4, take bagasse raw material as contrast, measure the content of bagasse cellulose, the result is as attached figure 1 , indicating that the use of 1mol / L HNO 3 The treated bagasse had the highest cellulose purity, with a cellulose content of (97.26±2.30)%; the bagasse treated with 1mol / L HCl had the second highest cellulose purity, with a cellulose content of (92.97±1.40)%; untreated The cellulose content of bagasse is relatively low, only (53.76±2.59)%. Therefore, it is preferred to use 1mol / L HNO 3 Processed bagasse.

Embodiment 3

[0044] The rest of the method for preparing bagasse microspheres in this example is the same as in Example 1, except that: according to step S3 and step S4, 1mol / L of HNO is successively used for bagasse 3 Treatment and 1mol / L NaOH solution treatment, while only adopting 1mol / L HNO according to step S3 3 Treated as a control, the obtained bagasse cellulose content is as attached figure 2 . figure 2 It shows that the cellulose content of bagasse after treatment with 1mol / L NaOH solution can be significantly increased, so 1mol / L NaOH solution is selected for treatment.

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Abstract

The invention discloses a preparation method of bagasse microspheres. The method comprises the following steps: pulverizing bagasse by using a pulverizer, performing soaking for 5 h or more by using water with a mass of 5 times of a mass of the bagasse powder, performing filtering to remove water, performing treatment on the wet bagasse powder by using a 1 mol / L HNO3 solution with a mass of 5 times of a mass of the wet bagasse powder, performing treatment by using a 1 mol / L NaOH solution with a mass of 5 times of a mass of the wet bagasse powder obtained by the HNO3 treatment, performing treatment by using a 0.5 mol / L acetic acid-0.1 mol / L sodium chlorite mixed solution with a mass of 5 times of a mass of the wet bagasse powder obtain by NaOH treatment, dissolving the treated wet bagasse powder into a 3 mol / L NaOH-0.8 mol / L urea mixed solution with a mass of 5 times of a mass of the treated wet bagasse powder to obtain a transparent colloidal solution, performing modification by adopting glutaraldehyde with a final concentration of 40 mmol / L, finally performing dispersion by using palm oil containing Span-80 (Span-80) to prepare bagasse microspheres, and performing full washing byusing 50% ethanol to remove the palm oil and the Span-80. According to the preparation method of the bagasse microspheres provided by the invention, modification is performed, remodeling is performed,so that cellulose microspheres are developed, a substrate with a loose hydrophilic network structure is formed, the specific surface area is increased, the permeability and liquid fluidity of the bagasse are improved, and the strength, adsorption performance and application performance of the bagasse microspheres are greatly promoted.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, in particular to a method for preparing bagasse microspheres. Background technique [0002] Bagasse is the main waste of the sugar industry (accounting for 24% to 27%). The total output of sugarcane in the southern sugarcane region is more than 70 million tons, and the annual bagasse output is about 20 million tons. In terms of comprehensive utilization of bagasse, long bagasse is often used in papermaking, while short fibers are often put into boilers for combustion treatment, which has not been fully utilized. Therefore, how to effectively utilize bagasse and increase the added value of bagasse has always been a hot issue that the sugar industry needs to solve urgently. [0003] Cellulose, cellulose composite modified materials and derivative products have been widely used in the fields of plastics, textiles, papermaking, food, daily chemicals, medicine, construction, petrochemis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01J13/02
Inventor 杨胜远韦锦
Owner LINGNAN NORMAL UNIV