Preparation of novel boric acid functionalized macroporous resin and application of novel boric acid functionalized macroporous resin in selective adsorption of stevioside

A technology of macroporous resin and stevioside, which is applied in the preparation of sugar derivatives, sugar derivatives, sugar derivatives, etc., can solve the problem of limited effect of separating STV, and achieve improved separation and purification, high adsorption capacity, and high selectivity Effect

Pending Publication Date: 2021-04-13
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of stevioside selective adsorption material, to solve the existing problem of limited effect of separating STV from stevioside

Method used

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  • Preparation of novel boric acid functionalized macroporous resin and application of novel boric acid functionalized macroporous resin in selective adsorption of stevioside
  • Preparation of novel boric acid functionalized macroporous resin and application of novel boric acid functionalized macroporous resin in selective adsorption of stevioside
  • Preparation of novel boric acid functionalized macroporous resin and application of novel boric acid functionalized macroporous resin in selective adsorption of stevioside

Examples

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Effect test

preparation example Construction

[0039] see figure 1 Shown, the present invention is a kind of preparation method of stevioside selective adsorption material, comprises the following steps:

[0040] Step S01: preparing acrylic macroporous resin by suspension polymerization;

[0041] Step S02: introducing the acrylate macroporous resin into the initiator BIBB to form brominated active sites on the surface of the acrylate macroporous resin to obtain the initiator functionalized resin;

[0042] Step S03: adding the initiator functionalized resin into the polymerization solution, and grafting the brominated active sites on the surface of the acrylate macroporous resin to obtain a steviol glycoside selective adsorption material.

[0043] Preferably, in step S01, the composition of the acrylic macroporous resin includes by weight components: acrylic esters-1.072 parts, GDMA-5.555 parts, ethyl acetate-6.627 parts, AIBN-26.506 parts and HPMC-0.133 parts ; wherein acrylates are monomers, GDMA is a crosslinking agent...

Embodiment 1

[0063] This example provides the application of the above stevioside selective adsorption material in the adsorption of stevioside.

[0064] First weigh 0.1g of stevioside selective adsorption material and place it in the conical flask, then pipette 50ml of the prepared stevioside solution (STV: RA=1:1) with a concentration of 6g / L, and add it to the conical flask , the Erlenmeyer flask was sealed, and the Erlenmeyer flask was placed in a constant temperature shaking box, oscillating at a constant temperature of 30°C, and the equilibrium adsorption amount Qe of stevioside was calculated by the following formula:

[0065]

[0066] In the formula, Qe is the equilibrium adsorption capacity of selective adsorption material to stevioside, the unit is mg / g; V is the volume of stevioside solution, the unit is mL; C 0 is the initial concentration of stevioside solution, in g / L; Ct is the concentration of stevioside in the supernatant after adsorption equilibrium, in g / L; m is the m...

Embodiment 2

[0072] Such as figure 2 As shown, the infrared spectrum of the original hydroxyl-containing acrylate resin and the grafted resin microspheres obtained in this embodiment can be seen in the infrared spectrum, and in the boric acid functionalized grafted resin spectrum, 1350cm -1 A new B-O bond characteristic absorption peak appeared at , which proved that VPBA was successfully grafted to the surface of acrylic resin;

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Abstract

The invention discloses a preparation method of a stevioside selective adsorption material, and relates to the technical field of stevioside purification. The preparation method comprises the following steps: preparing acrylate macroporous resin through a suspension polymerization method; introducing an initiator BIBB to form brominated active sites on the surface of the acrylate macroporous resin to obtain initiator functional resin; and adding the initiator functionalized resin into a polymerization solution in which a boric acid functionalized monomer is dissolved, and grafting the brominated active sites on the surface of the acrylate macroporous resin to obtain the stevioside selective adsorption material. According to the method, through Van der Waals' force and hydrogen bond acting force, the resin with good affinity and high adsorption capacity to stevioside is formed, and boric acid site grafting is performed on the surface of the resin by utilizing the characteristic of specific adsorption capacity of boric acid to cis-diol, so that the enrichment, recovery and separation capacity of the resin to stevioside is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of stevioside purification, and in particular relates to a preparation method of a stevioside selective adsorption material. Background technique [0002] Stevioside is a mixture of several steviosides extracted from the leaves of Stevia rebaudiana. It is a natural sweetener. The sweetness of stevioside is about 300 times that of sucrose. Toxicity, no side effects and other advantages, so it is generally loved by people, and has replaced some artificial sweeteners in food additives, but compared with the purity of sweet taste of sucrose, stevioside has a bitter taste, to a certain extent It affects the application effect, so its bitterness needs to be removed. [0003] Stevioside is a mixture of eight kinds of diterpene glycosides, the eight kinds of diterpene glycosides are: stevioside (STV), steviolbioside (steviolbioside), rebaudioside A (rebaudioside A, RA), Rui Bao Rebaudioside B (rebaudioside B, RB),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/04C08F230/06B01J20/26B01J20/30C07H15/256C07H1/06
CPCC08F265/04B01J20/264C07H15/256C07H1/06C08F230/065
Inventor 王贺云李昊吕银魏忠赵亚欣贾茹
Owner SHIHEZI UNIVERSITY
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