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Chitosan soft capsule, its preparation method and application

A chitosan gel, chitosan technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as reducing the adsorption capacity of chitosan, and achieve heavy metal ion adsorption. Strong ability, suitable for mass production, simple process effect

Active Publication Date: 2021-04-06
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have shown that the introduction of Fe ions will reduce the adsorption capacity of chitosan on Cr ions

Method used

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  • Chitosan soft capsule, its preparation method and application
  • Chitosan soft capsule, its preparation method and application
  • Chitosan soft capsule, its preparation method and application

Examples

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preparation example Construction

[0031] A kind of preparation method of chitosan soft capsule, it comprises the following steps:

[0032] Mix chitosan and acetic acid aqueous solution evenly to obtain chitosan gel solution; preferably, the volume concentration of acetic acid in the acetic acid aqueous solution is 3-5%; preferably, the amount ratio of chitosan and acetic acid aqueous solution is 3-5g : 80-150ml; Preferably, the chitosan and the acetic acid aqueous solution are mixed uniformly and left to stand overnight; Preferably, the uniform mixing is to stir at 50-120r / min for 30-90min.

[0033] Chitosan gel solution and trihexyl tetradecyl phosphine chloride are mixed and stirred evenly to obtain a reaction solution; preferably, the volume ratio of chitosan gel solution and trihexyl tetradecyl phosphine chloride is 10- 20:1.

[0034] The reaction solution is dripped into the aqueous solution of sodium tripolyphosphate under the condition of stirring, filtered and washed to obtain soft capsules of chitosa...

Embodiment 1

[0040] The embodiment of the present invention provides a kind of preparation method of chitosan soft capsule, it comprises following preparation steps:

[0041] S11. Mix chitosan and acetic acid aqueous solution according to the ratio of 4g: 100ml to obtain chitosan gel solution; wherein, the volume concentration of acetic acid in the acetic acid aqueous solution is 3%;

[0042] S12. Mix 100ml of chitosan gel solution and 10ml of trihexyltetradecylphosphine chloride, and stir at 60r / min for 60min to obtain a reaction solution.

[0043] S13. Drop the reaction liquid into the sodium tripolyphosphate aqueous solution, stir at 500r / min for 30min, filter and wash repeatedly with deionized water several times to obtain the chitosan soft capsule; The mass concentration of sodium phosphate is 5%.

Embodiment 2

[0045] The embodiment of the present invention provides a kind of preparation method of chitosan soft capsule, it comprises following preparation steps:

[0046] S21. Mix chitosan and acetic acid aqueous solution according to the ratio of 5g: 120ml, and let stand overnight to obtain chitosan gel solution; wherein, the volume concentration of acetic acid in the acetic acid aqueous solution is 4%;

[0047] S22. Mix 150ml of chitosan gel solution and 10ml of trihexyltetradecylphosphine chloride, and stir at 80r / min for 50min to obtain a reaction solution.

[0048] S23, drop the reaction liquid into the aqueous solution of sodium tripolyphosphate, stir at 400r / min for 50min, filter, and wash repeatedly with deionized water several times to obtain the chitosan soft capsule; The mass concentration of sodium polyphosphate is 6%.

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Abstract

A chitosan soft capsule, a preparation method and application thereof, and relate to the technical field of modified chitosan. The preparation method of the chitosan soft capsule provided in the embodiment of the present invention is as follows: mixing chitosan and an aqueous acetic acid solution uniformly to obtain a chitosan gel solution; chlorinating the chitosan gel solution and trihexyltetradecyl chloride The phosphine is mixed and stirred evenly to obtain a reaction solution; the reaction solution is dropped into an aqueous solution of sodium tripolyphosphate under stirring conditions, filtered and washed to obtain chitosan soft capsules. The preparation method of the chitosan soft capsule provided in the embodiment of the present invention is simple in process and suitable for large-scale production. In addition, the present invention also relates to the chitosan soft capsule prepared by the above preparation method and its application in the heavy metal ion adsorbent.

Description

technical field [0001] The invention relates to the technical field of modified chitosan, and in particular to a chitosan soft capsule, a preparation method and application thereof. Background technique [0002] With the rapid development of industry and the continuous growth of the world's population, environmental pollution is becoming more and more serious, and seriously threatens the survival and development of human beings, especially the pollution and harm of heavy metal chromium. Chromium mainly exists in two valence states of trivalent chromium and hexavalent chromium. Trivalent chromium and hexavalent chromium can be transformed into each other. Trivalent chromium mainly exists in water as Cr(OH) 2+ Exists in the form of hexavalent chromium in water mainly as CrO 4 2+ 、Cr 2 o 7 2- and HCrO 4 3- It exists in the form of plasma, and the toxicity of chromium to the human body is mostly caused by tetravalent chromium, which is carcinogenic, teratogenic and mutage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28C02F1/28C02F101/22
CPCB01J20/24B01J20/28014C02F1/286C02F2101/22
Inventor 吴桂萍林晓宇万思刘瑾易川崔龙哲
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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