UV-triggered shape-controllable PP fabric

Shang, Jiaojiao; Song, Lin; Théato, Patrick

doi:10.1039/c8py00411k

Cited by 13 publications

(13 citation statements)

References 31 publications

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“…Synthesis of PPFPA: Precursor polymer PPFPA was synthesized according to a reported method. [37] PFPA (2.4 g, 10.1 mmol), 1,4-dioxane (3.8 mL), azobisisobutyronitrile (3.3 mg, 0.02 mmol) were added into a Schlenk flask. Afterward, the reaction was frozen and thawed three times, where liquid N 2 and N 2 gas were used for freezing and protection, respectively.…”

Section: Methodsmentioning

confidence: 99%

A Convenient Route to Prepare Reactive Azobenzene‐Containing Liquid Crystal Polymers and Photodeformable Fibers

Yan

Liu

Théato

et al. 2021

Advanced Intelligent Systems

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Azobenzene-containing liquid crystal polymers (azo-LCPs) as a kind of stimuli-responsive material have been widely used in fabricating intelligent actuators including artificial muscles, [1][2][3] soft robotics, [4][5][6] and microfluidics. [7][8][9] Recently, introducing reactive groups into azo-LCPs has aroused much interest because it allows a post-processing modification, which is hard to be realized in conventional crosslinked azo-LCPs. [10][11][12][13][14][15][16] For example, after the fabrication process, these reactive groups can be used in crosslinking reactions to improve the mechanical properties or functional modification to obtain more capabilities, providing a new possibility to construct intelligent soft actuators. As a consequence, various reactive groups such as hydroxyl, [11][12][13] N-hydroxysuccinimide esters, [14,15] and thiol groups [16] have been applied to azo-LCPs for different purposes. So far, most reactive azo-LCPs are synthesized by homopolymerization of azo monomers containing reactive substituents [14][15][16] or by copolymerization of azo monomers with reactive monomers. [17,18] However, these direct polymerization methods often suffer from limited group tolerance because many reactive groups may lead to side reactions or hinder the polymerization. Moreover, the synthesis of azo monomers exhibiting reactive substituents is usually complex and tedious, which dramatically limits the applicability of such reactive azo-LCPs. Therefore, an effective approach to generate reactive azo-LCPs is highly desirable.Post-polymerization modification (PPM) of a precursor polymer bearing reactive groups provides a facile strategy to synthesize reactive azo-LCPs. [19,20] By partially modifying with azobenzene compounds, a polymer containing both azobenzene groups and reactive groups can be easily obtained. In addition, this approach enables the easy and highly efficient synthesis of a systematic library of LCPs from a single reactive precursor polymer. Recently, Zhao and co-workers designed a novel liquid crystal elastomer utilizing a styrene-butadiene-styrene (SBS) triblock copolymer as the reactive precursor polymer. [21] Through first modification by thiol groups and subsequent esterification reaction with azobenzene mesogens, the unresponsive SBS polymer was successfully converted into a photoresponsive LCP. However, this relatively cumbersome PPM route inevitably restricts their application. As demonstrated by Theato and coworkers, poly(pentafluorophenyl acrylate) (PPFPA) as a reactive precursor polymer can react with many functional groups including amines and alcohols under mild conditions, even near-quantitative conversion for most of the amines. [22,23] This high reactivity, companying with the excellent solubility and hydrolysis resistance, makes PPFPA an attractive platform for the preparation of libraries of functional polymers. [20] To date, various functional materials such as reactive surfaces, [24,25] amphiphilic nanogels, [26,27] and multi-responsive polymers [28,29] have been synt...

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Section: Methodsmentioning

confidence: 99%

A Convenient Route to Prepare Reactive Azobenzene‐Containing Liquid Crystal Polymers and Photodeformable Fibers

Yan

Liu

Théato

et al. 2021

Advanced Intelligent Systems

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“…For example, a polypropylene fabric was spin coated with azobenzene‐containing polymer (poly[di(ethylene glycol)methyl ether methacrylate‐ co ‐4‐(4‐methoxy‐phenylazo) acrylate]). The bilayer fabric could reversibly bend when irradiated with UV light …”

Section: Systems and Actuation Mechanismsmentioning

confidence: 99%

Light‐Responsive Shape‐Changing Polymers

Stoychev

Kirillova

Ionov

2019

Advanced Optical Materials

156

117

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Shape‐changing polymers are an emerging class of smart stimuli‐responsive materials. Among the different stimuli that could be used for polymer actuation, light has several especially attractive features, including precise spatial and temporal remote control, easily tunable properties, and on‐demand pausing and resuming of the actuation. Consequently, light‐responsive polymers offer potential solutions to many pressing technological problems, especially where a noncontact form of stimulation and control is desired. In this review, state‐of‐the‐art advancements in the field of light‐responsive shape‐changing polymers are highlighted. The systems are classified according to the material type and the underlying light‐driven actuation/shape‐change mechanism. Finally, the most promising applications for light‐driven polymeric actuators are outlined, followed by challenges in the area and outlook on future promising directions.

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“…In this frame a film of the light‐responsive polymer, poly[di(ethylene glycol)methyl ether methacrylate‐co‐4‐(4‐methoxy‐phenylazo) acrylate], was physically adsorbed onto the surface of a polypropylene fabric, acting as passive layer . The functional polymer composite promptly responded to UV stimuli and showed reversible shape (bending) transitions, due to the volume constrictions in the active layer.…”

Section: Light‐driven Functionsmentioning

confidence: 99%

Light‐Responsive Polymer Membranes

Pantuso

Filpo

Nicoletta

2019

Advanced Optical Materials

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Stimuli‐responsive polymer membranes have gained particular attention for the ability to tune opportunely their physicochemical properties under the application of an external stimulus. Heat, pH value, ionic strength, pressure, humidity, electric and magnetic fields, antigen/antibody interactions, chemical reactions, and light can be used as triggers for specific responses in polymer membranes. In particular, light is a fascinating stimulus, as it is a green energy, which can be modulated in a precise and convenient way. In addition, it allows remote and contactless interactions without changing the original chemical environment. This review reports recent progresses in light‐responsive polymer membranes with particular attention to chemical groups and responsive mechanisms.

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UV-triggered shape-controllable PP fabric

Cited by 13 publications

References 31 publications

A Convenient Route to Prepare Reactive Azobenzene‐Containing Liquid Crystal Polymers and Photodeformable Fibers

A Convenient Route to Prepare Reactive Azobenzene‐Containing Liquid Crystal Polymers and Photodeformable Fibers

Light‐Responsive Shape‐Changing Polymers

Light‐Responsive Polymer Membranes

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