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Method for radiation degradation of xanthan gum through electron beams

A technology of electron beam radiation and xanthan gum, which is applied in the field of electron beam radiation to degrade xanthan gum, can solve the problems of increased crude oil density, slow dissolution, increased viscosity, etc., and achieves increased free radical scavenging rate and improved antioxidant performance , The effect of increasing the reducing power

Inactive Publication Date: 2019-03-26
ZHEJIANG ENERGY & NUCLEAR TECH APPL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although xanthan gum has a wide range of uses, there are also deficiencies in practical applications. For example, xanthan gum tends to form glue blocks during the dissolution process, resulting in slow dissolution; the use of xanthan gum in the oil recovery process can increase oil recovery, but it also makes the recovery process more difficult. The physical properties of liquid crude oil change, the density of crude oil increases, the viscosity increases, and the emulsification state of crude oil is complicated, which increases the difficulty of sewage treatment and increases the cost of subsequent processes such as oil transportation and product purification.
Domestic research on xanthan gum radiation degradation is still very little, only the Chinese Academy of Agricultural Sciences has carried out γ-ray radiation degradation research, and there is no report on electron beam radiation degradation

Method used

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  • Method for radiation degradation of xanthan gum through electron beams
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  • Method for radiation degradation of xanthan gum through electron beams

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Irradiation Degradation of Solid Xanthan Gum

[0018] The solid Fufeng xanthan gum is directly irradiated and degraded by electron beams, and the relationship between its intrinsic viscosity [η] and absorbed dose D is shown in figure 1 ;

[0019] figure 1 It can be seen in the figure that the intrinsic viscosity [η] decreases with the increase of the absorbed dose D, and the absorbed dose D is in the stage of 0-50KGy, and the intrinsic viscosity [η] decreases rapidly with the increase of the absorbed dose D, from about 2000mL / g to about 550mL and when the absorbed dose D was greater than 100KGy, the intrinsic viscosity [η] decreased slowly with the increased absorbed dose D, and was about 180mL / g at 200KGy, indicating that the radiation could degrade the xanthan gum, but a relatively high A low intrinsic viscosity [η] requires a larger irradiation dose. (concentration of xanthan gum solution 1.5mg / mL when measuring intrinsic viscosity)

Embodiment 2

[0021] Irradiation Degradation of Solid Xanthan Gum with Different Specifications

[0022] In order to compare the radiation degradation of xanthan gum produced by different processes, this example tested the intrinsic viscosity [η] and absorption of different xanthan gums such as Zhongxuan 9290 (food grade), a certain American brand (food grade), and Aladdin (ups). The relationship between dose D, the results confirmed that no matter what kind of xanthan gum, the intrinsic viscosity [η] decreases with the increase of absorbed dose D. The trend of decline remains unchanged, but the rate of decline is different. figure 2 It is the relationship between the intrinsic viscosity [η] of Aladdin xanthan gum and the absorbed dose D, the intrinsic viscosity [η] of unirradiated xanthan gum is about 1600mL / g, and it is about 320mL / g at 200KGy. and figure 1 It can be seen from the comparison that the decrease rate of Aladdin intrinsic viscosity [η] is lower than that of Fufeng xanthan g...

Embodiment 3

[0024] Irradiation Degradation of Liquid Xanthan Gum

[0025] In order to observe the radiation degradation characteristics of liquid xanthan gum, Fufeng and Aladdin xanthan gums were respectively selected to form 1mg / mL sodium chloride aqueous solution, and different doses of irradiation tests were carried out. The outflow time, see Table 1.

[0026] Table 1 The relationship between liquid xanthan gum absorbed dose D and outflow time

[0027]

[0028] It can be seen from Table 1 that no matter it is Fufeng or Aladdin, the outflow time of liquid xanthan gum after radiation is only slightly longer than that of the solvent when the absorbed dose D=2.5KGy. At this time, the intrinsic viscosity [η]=47.5mL calculated according to the formula / g. All other doses are the same as the solvent, so the Ubbelohde viscometer is not suitable for directly measuring the intrinsic viscosity [η] after such liquid xanthan gum is irradiated.

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Abstract

The invention discloses a method for radiation degradation of xanthan gum through electron beams. According to the method, the xanthan gum is radiated by virtue of the electron beams and is solid-state xanthan gum or liquid-state xanthan gum; by carrying out radiation through the electron beams, particularly the viscosity average molecular weight Meta can be decreased from about 3000000 to about 20000 during the radiation of the liquid-state xanthan gum when the absorbed doses D is only 2.5KGy, and the intrinsic viscosity is decreased from over 2000mL / g to 47.5mL / g. Besides, the oxidation resistance of the degraded xanthan gum is greatly increased relative to that of undegraded xanthan gum, the reducing power is increased by over 300%, and the DPPH free radical scavenging rate is increasedby over 100%.

Description

technical field [0001] The invention relates to a method for degrading xanthan gum by electron beam radiation. Background technique [0002] Xanthan gum, also known as xanthan gum, xanthan gum, and yellow single-cell polysaccharide, is a biological glue with superior performance in the world at present, with a molecular weight of 2×10 6 —5×10 7 . Due to its unique molecular structure and its conformation in aqueous solution, xanthan gum has unique physical and chemical properties, and is excellent in pseudoplastic rheology, viscosity increasing, solubility, and stability. Xanthan gum is widely used not only in food industry, but also in oil drilling, tertiary oil recovery, textile, printing and dyeing, ceramic processing, coating, explosives, hydrometallurgy, medicine, pesticide, cosmetics and other industries. Known as industrial monosodium glutamate, it is the microbial polysaccharide with the largest production scale and a wide range of uses in the world. [0003] The...

Claims

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Application Information

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IPC IPC(8): C08B37/00
CPCC08B37/0033
Inventor 章月红陈祖良谢裕颖李兆龙王华明
Owner ZHEJIANG ENERGY & NUCLEAR TECH APPL RES INST
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