Carboxylic modification of welan gum

Xin Li; Zhuang Liu; Lun Yu Zhu; Shan Shan Miao; Zheng Fang; Li Huan Zhao; Kai Guo

doi:10.1002/app.48301

Carboxylic modification of welan gum

Xin Li, Zhuang Liu, Lun Yu Zhu, Shan Shan Miao, Zheng Fang, Li Huan Zhao, Kai Guo

COLLEGE OF BIOTECHNOLOGY AND PHARMACEUTICAL ENGINEERING

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Welan gum has disadvantages such as poor solubility, low viscosity, and poor crosslinking property, when it is applied in petroleum industry, comparing to guar gum. Two methods for the carboxylic modification of welan gum were developed, carboxyethyl modification and citric acid modification, to improve the solubility in water, viscosity, and crosslinking ability of welan gum in the borax crosslinking system. The solubility time of carboxyethyl modified and citric acid modified welan gum were shortened to 30 and 90 min, respectively. The highest viscosity of citric acid modified product was 49.4 mPa s, the viscosity after crosslinking was raised at least 1.2 times to the highest four times than that before crosslinking. The results indicated three factors affecting the properties of modified products: (1) how many function groups in the modifying agent; (2) the way to connect the function group; and (3) the whole structure of the modifying agent.

Original language	English
Article number	48301
Journal	Journal of Applied Polymer Science
Volume	137
Issue number	3
DOIs	https://doi.org/10.1002/app.48301
State	Published - 15 Jan 2020

Keywords

Welan gums
oil and gas
structure–property relations

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10.1002/app.48301

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title = "Carboxylic modification of welan gum",

abstract = "Welan gum has disadvantages such as poor solubility, low viscosity, and poor crosslinking property, when it is applied in petroleum industry, comparing to guar gum. Two methods for the carboxylic modification of welan gum were developed, carboxyethyl modification and citric acid modification, to improve the solubility in water, viscosity, and crosslinking ability of welan gum in the borax crosslinking system. The solubility time of carboxyethyl modified and citric acid modified welan gum were shortened to 30 and 90 min, respectively. The highest viscosity of citric acid modified product was 49.4 mPa s, the viscosity after crosslinking was raised at least 1.2 times to the highest four times than that before crosslinking. The results indicated three factors affecting the properties of modified products: (1) how many function groups in the modifying agent; (2) the way to connect the function group; and (3) the whole structure of the modifying agent.",

keywords = "Welan gums, oil and gas, structure–property relations",

author = "Xin Li and Zhuang Liu and Zhu, {Lun Yu} and Miao, {Shan Shan} and Zheng Fang and Zhao, {Li Huan} and Kai Guo",

note = "Publisher Copyright: {\textcopyright} 2019 Wiley Periodicals, Inc.",

year = "2020",

month = jan,

day = "15",

doi = "10.1002/app.48301",

language = "英语",

volume = "137",

journal = "Journal of Applied Polymer Science",

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TY - JOUR

T1 - Carboxylic modification of welan gum

AU - Li, Xin

AU - Liu, Zhuang

AU - Zhu, Lun Yu

AU - Miao, Shan Shan

AU - Fang, Zheng

AU - Zhao, Li Huan

AU - Guo, Kai

PY - 2020/1/15

Y1 - 2020/1/15

N2 - Welan gum has disadvantages such as poor solubility, low viscosity, and poor crosslinking property, when it is applied in petroleum industry, comparing to guar gum. Two methods for the carboxylic modification of welan gum were developed, carboxyethyl modification and citric acid modification, to improve the solubility in water, viscosity, and crosslinking ability of welan gum in the borax crosslinking system. The solubility time of carboxyethyl modified and citric acid modified welan gum were shortened to 30 and 90 min, respectively. The highest viscosity of citric acid modified product was 49.4 mPa s, the viscosity after crosslinking was raised at least 1.2 times to the highest four times than that before crosslinking. The results indicated three factors affecting the properties of modified products: (1) how many function groups in the modifying agent; (2) the way to connect the function group; and (3) the whole structure of the modifying agent.

AB - Welan gum has disadvantages such as poor solubility, low viscosity, and poor crosslinking property, when it is applied in petroleum industry, comparing to guar gum. Two methods for the carboxylic modification of welan gum were developed, carboxyethyl modification and citric acid modification, to improve the solubility in water, viscosity, and crosslinking ability of welan gum in the borax crosslinking system. The solubility time of carboxyethyl modified and citric acid modified welan gum were shortened to 30 and 90 min, respectively. The highest viscosity of citric acid modified product was 49.4 mPa s, the viscosity after crosslinking was raised at least 1.2 times to the highest four times than that before crosslinking. The results indicated three factors affecting the properties of modified products: (1) how many function groups in the modifying agent; (2) the way to connect the function group; and (3) the whole structure of the modifying agent.

KW - Welan gums

KW - oil and gas

KW - structure–property relations

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U2 - 10.1002/app.48301

DO - 10.1002/app.48301

M3 - 文章

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SN - 0021-8995

VL - 137

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

IS - 3

M1 - 48301

ER -

Carboxylic modification of welan gum

Abstract

Keywords

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