Method for extracting 3D printing thermoplastic material from wood

A thermoplastic material, 3D printing technology, applied in the fields of additive processing, fiber raw material processing, textiles and papermaking, etc., can solve the problem of material cannot be prepared, and achieve the effect of high value-added utilization and improved molding effect.

Inactive Publication Date: 2018-06-22

BEIJING FORESTRY UNIVERSITY

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AI-Extracted Technical Summary

Problems solved by technology

Existing 3D printing materials include many, such as metal materials, plastics, aluminum alloys, etc., but no one has tried 3D printi...

Abstract

The invention discloses a method for extracting a 3D printing thermoplastic material from wood, belongs to the technical field of 3D printing and in particular relates to the technical field of extracting 3D printing materials from wood. The method for extracting the 3D printing thermoplastic material from wood comprises the following steps: I, preparing an extraction liquid, namely mixing benzeneor a benzene derivative with ethanol so as to obtain the extraction liquid; II, putting wood flour and the extraction liquid into an extraction device, and performing extraction so as to obtain extraction residues; III, preparing a buffer solution, putting the extraction residues into the buffer solution, and stirring at 70-80 DEG C till a mixed liquid is whitened so as to obtain an oxidation product; IV, performing centrifugal separation on the oxidation product, washing with distilled water till being neutral, further washing with acetone, and finally performing vacuum drying on the washingproduct so as to obtain comprehensive cellulose; V, preparing an alkali solution, mixing the alkali solution with the comprehensive cellulose, and performing a series of treatment in a reaction kettle, thereby obtaining the thermoplastic material. The material prepared by using the method can be applied to 3D printing.

Application Domain

Additive manufacturing apparatusPaper material treatment

Technology Topic

CelluloseBenzene derivatives +8

Examples

Experimental program(4)

Example

[0023] First embodiment

[0024] The embodiment of the present invention provides a method for extracting 3D printing thermoplastic materials from wood, and the method is performed in the following steps:

[0025] 1. Prepare the extract: take benzene or a benzene derivative and mix with ethanol to obtain the extract, and the volume ratio of the ethanol to the benzene or the benzene derivative is 1: (1-3.5);

[0026] 2. Put the wood flour and the extraction solution prepared in step 1 into the extraction device for extraction to obtain the extraction residue; 3. Prepare a buffer solution, the pH of the buffer solution is 3.8-4.2, go to step 2 to obtain Add the buffer solution to the extraction residue to obtain a mixed solution, and stir at 70°C-80°C until the mixed solution turns white to obtain an oxidation product;

[0027] 4. Centrifugal separation of the oxidation product obtained in step 3, and then wash with distilled water to neutrality, then wash with acetone, and finally vacuum dry the washed product to obtain holocellulose;

[0028] 5. Prepare an alkaline solution, then mix the alkaline solution with the above-mentioned holocellulose, put it into the reaction kettle for reaction, after reacting for 1h-3h, filter to obtain the filtrate, add acetic acid to the filtrate, adjust the pH to 5.6-5.9 , Then add flocculant and organic solvent, stir with homogenizer, centrifuge and filter to obtain precipitation, wash precipitation with ethanol, and finally freeze-dry to obtain thermoplastic material.

[0029] Wherein, the preparation buffer solution is prepared by using sodium chlorite and glacial acetic acid with a mass fraction of 1%-1.5%.

[0030] The embodiment of the present invention provides a method for extracting 3D printing thermoplastic materials from wood. The difference from the foregoing embodiment is that the benzene derivative is toluene.

Example

[0031] Second embodiment

[0032] The embodiment of the present invention provides a method for extracting 3D printing thermoplastic materials from wood. The method for extracting a 3D printing thermoplastic material from wood is different from any specific implementation in the first embodiment in that the temperature of the vacuum drying in step 4 is 50°C-65°C.

[0033] Wherein, the alkaline solution in step 5 is a NaOH or KOH solution, and the mass concentration of the NaOH or KOH solution is 5%-15%.

[0034] The embodiment of the present invention provides a method for extracting 3D printing thermoplastic materials from wood. The difference from the previous embodiment is that the number of rotations of the centrifugation in step 4 and step 5 is 5000-7000rpm, and the centrifugation time is 10min-15min .

[0035] The embodiment of the present invention provides a method for extracting 3D printing thermoplastic materials from wood. The difference from the foregoing embodiment is that the homogenizer has a stirring rate of 500-1500 revolutions per minute and stirring for 5-20 minutes.

Example

[0036] The third embodiment

[0037] The embodiment of the present invention provides a method for extracting 3D printing thermoplastic materials from wood. The method for extracting 3D printing thermoplastic materials from wood is different from any one of the first and second embodiments in that the flocculant is a high molecular weight polymer, an anionic flocculant, One or more of inorganic flocculants.

[0038] Wherein, the high molecular weight polymer is polychitosan or cationic starch containing active amino groups; the inorganic flocculant is a polyaluminum or polyiron inorganic salt complex that can ionize a strong positive charge in water; an anionic flocculant is a ten One or more of sodium dialkylbenzene sulfonate, anionic polyacrylamide, and cetyltrimethylammonium bromide.

[0039] The embodiment of the present invention provides a method for extracting 3D printing thermoplastic materials from wood. The difference from the foregoing embodiment is that the organic solvent is one or more of methanol, ethanol, or propanol.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Improve molding effect

Method for extracting 3D printing thermoplastic material from wood

A thermoplastic material, 3D printing technology, applied in the fields of additive processing, fiber raw material processing, textiles and papermaking, etc., can solve the problem of material cannot be prepared, and achieve the effect of high value-added utilization and improved molding effect.

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

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Description & Claims & Application Information

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