Topological Confinement in Reversibly Interlocked Polymer Networks

Wan-Ting Dai ¹Zhen-Hua Xie ²Yu-Bin Ke ²Yang You ³Min-Zhi Rong ¹Ming-Qiu Zhang¹

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作者信息

1. Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education,GD HPPC Lab,IGCME,School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China
2. Spallation Neutron Source Science Center,China Spallation Neutron Source,Dongguan 523803,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China
3. College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China
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Abstract

Recently,we reported a series of reversibly interlocked polymer networks(RILNs),whose mechanical robustness and functionalities improvement was believed to be derived from topological interlocking of two sub-networks,although the direct evidence for the deduction is still lacking.Herein,a specially-designed RILNs system,in which the inter-component hydrogen bonds can be shielded as needed,was prepared and used to study the micro-structures of RILNs,aiming to verify the existence of mechanical interlocking in RILNs.By changing the pH of the swelling solvent,the effect exerted by the inter-component non-covalent bonds was eliminated,so detailed information of the networks struc-ture was exposed.The small angle X-ray scattering(SAXS)and small-angle neutron scattering(SANS)results indicated that swelling-induced structural evolution of the two sub-networks mutually affected each other,even when the inter-component hydrogen bonds were absent,prov-ing the presence of topological interlocking.The findings may help to draw a more accurate physical image and reveal the detailed structure-property relationship of RILNs.

Key words

Reversibly interlocked polymer networks/Small angle X-ray scattering/Small-angle neutron scattering/Topological confinement

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基金项目

National Natural Science Foundation of China(52033011)

National Natural Science Foundation of China(52173092)

National Natural Science Foundation of China(51973237)

Natural Science Foundation of Guangdong Province(2019B1515120038)

Natural Science Foundation of Guangdong Province(2020A1515011276)

Natural Science Foundation of Guangdong Province(2021A1515010417)

Science and Technology Planning Project of Guangzhou City(202201011568)

Talented Program of Guizhou University(X2022008)

Fundamental Research Funds for the Central Universities,Sun Yatsen University(23yxqntd002)

GBRCE for Functional Molecular Engineering()

Youth Innovation Promotion Association,CAS(2020010)

Guangdong Basic and Applied Basic Research Foundation(2021A1515110908)

出版年

2024

高分子科学(英文版)

中国化学会　中国科学院化学研究所

高分子科学(英文版)

CSTPCDCSCD

影响因子：0.721

ISSN：0256-7679

参考文献量43

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