Preparation and Adsorption Application Study of Fluorine-containing Conjugated Microporous Polymers

doi:10.6023/A19020066

Acta Chim. Sinica ›› 2019, Vol. 77 ›› Issue (6): 500-505.DOI: 10.6023/A19020066 Previous Articles Next Articles

Article

含氟共轭微孔聚合物的制备及其吸附应用研究

岳勇, 钱祉祺, 孔凡安, 肖琴, 任世杰

四川大学高分子科学与工程学院高分子材料工程国家重点实验室成都 610065

投稿日期:2019-02-22 发布日期:2019-04-17
通讯作者: 任世杰 E-mail:rensj@scu.edu.cn
基金资助:
项目受国家自然科学基金（Nos.21574087，21404074）和高分子材料工程国家重点实验室自主课题（Sklpme2018-2-05）资助.

Preparation and Adsorption Application Study of Fluorine-containing Conjugated Microporous Polymers

Yue Yong, Qian Zhiqi, Kong Fanan, Xiao Qin, Ren Shijie

College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China

Received:2019-02-22 Published:2019-04-17
Supported by:
Project supported by the National Natural Science Foundation of China (Nos. 21574087, 21404074) and the State Key Laboratory of Polymer Materials Engi-neering (No. Sklpme2018-2-05).

1. Preparation and Adsorption Application Study of Fluorine-containing Conjugated Microporous Polymers.PDF(636KB)

Abstract

Water pollution arising from ever-growing domestic sewage and industrial organic pollutants has caused severe environmental and ecological problems in many parts of the world. It is urgent to seek appropriate ways to resolve oily wastewater and organic solvent pollution. Currently, physical adsorption is considered to be one of the most important methods to eliminate the oil contaminations in water thanks to its high efficiency and low cost. However, traditional adsorbent materials, such as activated carbon, zeolite and natural fibers, often suffer from low adsorption capacities, poor adsorption selectivity and recyclability. Thus, it is still of great importance to develop new absorbent materials for the separation and removal of oils or organic pollutants from water to address environmental issues. Conjugated microporous polymers (CMPs) are a class of organic porous polymers that have attracted extensive attention thanks to their large specific surface area, good physicochemical stability and unique extended π-conjugation along the polymer skeleton. Here we report a fluorine-containing conjugated microporous polymer (F-CMP), which was synthesized via Sonogashira cross-coupling reaction from 1,3,5-trifluoro-2,4,6-triiodobenzene and 1,3,5-triethynylbenzene. As a comparison, fluorine-free conjugated microporous polymer (H-CMP) was synthesized in the same condition from 1,3,5-tribromobenzene and 1,3,5-triethynybenzene. By introducing fluorine atom into the conjugated microporous skeleton, the contact angle of F-CMP with water reaches 145°, exhibiting excellent hydrophobicity. Nitrogen adsorption/desorption isotherms of the F-CMP show a high specific surface area of 638 m²·g^-1, and the pore size distribution analysis shows the existence of both micropores and macropores. It can be obtained by adsorption experiments of oil and organic solvents that the adsorption capability of F-CMP increases significantly compared with its fluorine-free counterpart with similar structural skeleton. Due to high hydrophobicity and porous properties, F-CMP shows excellent adsorption properties towards to the removal of organic solvents and oils. The adsorption capability of F-CMP towards pump oil and chloroform can reach 40 g/g and 43 g/g, respectively. Meanwhile, F-CMP shows rapid adsorption rate and excellent adsorption recyclability. Thus, F-CMP displays promising application prospects in the field of organic pollutant adsorption and environmental remediation.

Key words: conjugated microporous polymer, fluorine doping, adsorption material

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Yue Yong, Qian Zhiqi, Kong Fanan, Xiao Qin, Ren Shijie. Preparation and Adsorption Application Study of Fluorine-containing Conjugated Microporous Polymers[J]. Acta Chim. Sinica, 2019, 77(6): 500-505.

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含氟共轭微孔聚合物的制备及其吸附应用研究

Preparation and Adsorption Application Study of Fluorine-containing Conjugated Microporous Polymers

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