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Preparation method of high-adsorbability corn stalk charcoal and application of high-adsorbability corn stalk charcoal in preparation of drug sustained release preparation

A corn stalk charcoal, high adsorption technology, applied in the directions of botanical equipment and methods, applications, biocides, etc., to achieve the effects of an environmentally friendly preparation process, a wide range of sources, and low prices

Pending Publication Date: 2022-03-18
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is no report on the use of corn stalk charcoal as drug sustained-release materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 The preparation method of high adsorption corn stover charcoal

[0033] (1) take the corn stalk and pulverize to obtain corn stalk powder, mix the corn stalk powder and the alkaline solution uniformly, and then grind for 1 hour to obtain a mixture; wherein, the mass ratio of the straw powder and the alkaline solution is 1:4;

[0034] (2) put the mixture into the drying oven of 100 ℃ and then put it into the tube furnace to carry out pyrolysis treatment to obtain a crude product;

[0035] (3) the crude product is washed with 1M hydrochloric acid solution, and then dried to obtain high-adsorption corn stover charcoal;

[0036] The alkali solution in step (1) is the potassium hydroxide aqueous solution that massfraction is 30%;

[0037] The pyrolysis treatment method in step (2) is as follows: in a nitrogen atmosphere with a flow rate of 3 mL / min, the temperature is raised to 900° C. at a heating rate of 8° C. / min for 3 hours.

Embodiment 2

[0038] Embodiment 2 The preparation method of high adsorption corn stover charcoal

[0039] Steps (1), (2) and (3) are the same as in Example 1;

[0040] The only difference is that the alkali solution in step (1) is an aqueous potassium carbonate solution with a mass fraction of 30%.

Embodiment 3

[0041] Embodiment 3 The preparation method of high adsorption corn stover charcoal

[0042] Steps (1), (2) and (3) are the same as in Example 1;

[0043] The only difference is that the alkali solution in step (1) is an aqueous potassium pyrophosphate solution with a mass fraction of 30%.

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Abstract

The invention relates to the technical field of carbon material preparation, and particularly discloses a preparation method of high-adsorbability corn stalk carbon and application of the high-adsorbability corn stalk carbon in preparation of a drug sustained release preparation. The preparation method of the high-adsorbability corn stalk carbon comprises the following steps: (1) uniformly mixing stalk powder with an alkali solution, and then grinding to obtain a mixture; (2) performing pyrolysis treatment on the mixture in a tubular furnace to obtain a crude product; and (3) cleaning the crude product, and drying to obtain the high-adsorbability corn stalk charcoal. The high-adsorbability corn stalk charcoal prepared by the method has better adsorption capacity on drugs, especially drugs with volatility (such as plant essential oil); furthermore, after the high-adsorbability corn stalk carbon is used for adsorbing drugs, agar and porous starch are used for wrapping the high-adsorbability corn stalk carbon, and a polymer wall shell is formed on the surface of the corn stalk carbon, so that the slow release effect is achieved.

Description

technical field [0001] The invention relates to the technical field of carbon material preparation, in particular to a preparation method of high-adsorption corn stover charcoal and its application in the preparation of drug sustained-release preparations. Background technique [0002] my country is a large agricultural country with a vast planting area and a huge volume. According to agricultural-related reports, the output of crop straw in my country in 2018 has reached 1.135 billion tons, and the utilization amount is 931 million tons, of which the output of corn straw is 350 million tons, with a wide range of sources and a large amount. At present, the main uses of corn stalks are returning to the field, cultivating fungi, feed applications, and energy applications. It is difficult to return corn stalks to the field, the soil plough layer has a limited bearing capacity, and the added value of the feed treatment method is low, and the conversion into energy has a higher ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30A01N25/08A01N65/42A01N65/12A01N57/28A01N25/34A01P1/00A01P3/00A01P7/04
CPCB01J20/20A01N25/08A01N65/42A01N65/12A01N57/28A01N25/34A01N65/00B01J2220/4825Y02E50/10
Inventor 林志丹陈彦羽曹琳张鹏
Owner JINAN UNIVERSITY