Cyclodextrin-tunable reversible self-assembly of a thermoresponsive Y-shaped polymer

Yao, Hao; Tian, Wei; Liu, Yuezhou; Bai, Yang; Liu, Dizheng; Liu, Tingting; Miao, Qi; Wang, Min; Liu, Yuyang

doi:10.1039/c5ra03064a

Cited by 8 publications

(13 citation statements)

References 44 publications

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“…Endowed with inherent fluidity, liquid metal can self‐deform to suit paths in various shapes. It has excellent electrical conductivity and can produce surface tension gradient under electric field [35,36]. Thus, its motion direction can be controlled by external electric field.…”

Section: Resultsmentioning

confidence: 99%

Electrolytic water technology based on transformable and amorphous liquid metal electrodes

Xing

Liu

2022

Applied Research

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Hydrogen has important values in industrial manufacture, medical health care, and diverse energy application areas. Among the many possible approaches, convenient and safe hydrogen production from water electrolysis has always been a preferred in situ hydrogen supply technology. So far, many of the electrodes thus involved are based on rigid metals or conductive items which may encounter inconvenience or insufficiency sometimes. To achieve targeted release of hydrogen, appropriate administration of suitable flexible hydrogen evolution electrodes is the key. In recent years, gallium-based liquid metals have emerged in the field of flexible and biological electrodes. Starting from this point, liquid metal is proposed here as a transformable amorphous electrode for hydrogen evolution in electrolytic water which may help mold new conceptual electrolysis and energy utilization ways. The electrochemical Applied Research.

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Section: Resultsmentioning

confidence: 99%

Electrolytic water technology based on transformable and amorphous liquid metal electrodes

Xing

Liu

2022

Applied Research

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“… Typical TEM images of PNIPAM-(2CD-2MPEG) aqueous solutions ( A – E ) with a concentration of 1.0 mg·mL −1 during the heating–cooling process. ( F – G ) The DLS results show a self-assembly process similar to that of TEM [ 138 ]. …”

Section: Figurementioning

confidence: 94%

“…Dynamic light scattering is used to study the size and distribution of aggregates formed in supramolecular polymer solution by measuring the change of light intensity with time. For example, Hao and his colleagues [ 138 ] constructed a Y-type supramolecular polymer by the inclusion interaction between β-cyclodextrin and azobenzene. The self-assembly process was monitored by DLS, providing auxiliary evidence for TEM, fluorescence spectroscopy and other testing methods.…”

Section: Characterization Methods Of Supramolecular Polymersmentioning

confidence: 99%

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

et al. 2022

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High molecular polymers have been widely studied and applied in the field of enhanced oil recovery (EOR). At present, the focus of research has been changed to the design of polymer networks with unique properties such as anti-temperature and anti-salinity, good injection and so on. Supramolecular polymers have high viscoelasticity as well as excellent temperature, salt resistance and injection properties. Can supramolecular polymers become another material choice for polymer flooding to enhance oil recovery? The present review aims to systematically introduce supramolecular polymers, including its design strategy, interactions and rheological properties, and address three main concerns: (1) Why choose supramolecular polymers? (2) How do we synthesize and characterize supramolecular polymers in the field of oilfield chemistry? (3) What has been the application progress of supramolecular polymers in improving oil recovery? The introduction of a supramolecular interaction system provides a new idea for polymer flooding and opens up a new research direction to improve oil recovery. Aiming at the “reversible dynamic” supramolecular polymers, the supramolecular polymers are compared with the conventional covalent macromolecular polymer networks, and the challenges and future research directions of supramolecular polymers in EOR are discussed. Finally, the author’s viewpoints and perspectives in this emerging field are discussed.

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“…[ 11,23,31 ] However, the rigid parts (e.g., compressors, SMA springs, or servomotors) used to assemble such systems limit their mechanical compliance. While alternative actuation strategies based on different stimuli‐responsive soft materials, such as liquid metals, [ 32 ] magnetic fluids, [ 33 ] hydrogels, [ 34 ] or dielectric elastomers, [ 35–37 ] have been explored for peristaltic locomotion, they typically offer little functionality beyond basic locomotion in predefined environments (e.g., tubes) and lack the actuation precision, scalability, and resilience to achieve effective motility observed in wormlike organisms. Thus, worm robots appear to be either functional or soft; a tendency that is also shared by recently reported bending actuators.…”

Section: Introductionmentioning

confidence: 99%

Modular Design of a Polymer‐Bilayer‐Based Mechanically Compliant Worm‐Like Robot

et al. 2023

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Soft earthworm‐like robots that exhibit mechanical compliance can, in principle, navigate through uneven terrains and constricted spaces that are inaccessible to traditional legged and wheeled robots. However, unlike the biological originals that they mimic, most of the worm‐like robots reported to date contain rigid components that limit their compliance, such as electromotors or pressure‐driven actuation systems. Here, a mechanically compliant worm‐like robot with a fully modular body that is based on soft polymers is reported. The robot is composed of strategically assembled, electrothermally activated polymer bilayer actuators, which are based on a semicrystalline polyurethane with an exceptionally large nonlinear thermal expansion coefficient. The segments are designed on the basis of a modified Timoshenko model, and finite element analysis simulation is used to describe their performance. Upon electrical activation of the segments with basic waveform patterns, the robot can move through repeatable peristaltic locomotion on exceptionally slippery or sticky surfaces and it can be oriented in any direction. The soft body enables the robot to wriggle through openings and tunnels that are much smaller than its cross‐section.

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Cyclodextrin-tunable reversible self-assembly of a thermoresponsive Y-shaped polymer

Abstract: The reversible self-assembly behavior of thermoresponsive γ-shaped polymer can be effectively tuned based on the inclusion complexation, intermolecular hydrogen bonding and steric hindrance of β-CD.

Cited by 8 publications

References 44 publications

Electrolytic water technology based on transformable and amorphous liquid metal electrodes

Electrolytic water technology based on transformable and amorphous liquid metal electrodes

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

Modular Design of a Polymer‐Bilayer‐Based Mechanically Compliant Worm‐Like Robot

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