The light-controlling of temperature-responsivity in stimuli-responsive polymers

Abdollahi, Amin; Roghani‐Mamaqani, Hossein; Razavi, Bahareh; Salami‐Kalajahi, Mehdi

doi:10.1039/c9py00890j

Cited by 152 publications

(94 citation statements)

References 257 publications

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“…Generally, the azobenzenes can be isomerized from "trans" to "cis" using a UV wavelength of 300-400 nm. The "cis" created isomers will convert back under visible illumination at above 400 nm to the stable "trans" state [28]. An alternating method composed of lanthanide-aspartic acid nanoscale coordination polymers blended with PLA has recently been used to generate fluorescent quick-read codes within FFF printed objects, acting as an original anticounterfeiting procedure; the composite PLA parts exhibit reddish-pink or blue-green fluorescence when exposed to UV light [29].…”

Section: Stimuli-responsive Polymers and Selected Applicationsmentioning

confidence: 99%

Selected Applications of Stimuli-Responsive Polymers: 4D Printing by the Fused Filament Fabrication Technology

et al. 2020

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In the past few years four-dimensional (4D) printing technologies have attained worldwide interest and they are now considered the "next big thing". The aim of this research is to provide three selected examples of stimuli-responsive polymer (SRP) applications additively manufactured (AM) by the fused filament fabrication (FFF) technique. To that end, a CCT BLUE filament of thermo-responsive polymer was chosen to produce a water temperature indicator, which changes colour from blue to white when temperature increases; a CCU RED filament of photo-responsive polymer was used to produce a sunlight / UV indicator bracelet; a transparent PLA CLEAR polymer, a CCU RED photo-responsive polymer, and an electrical conductive PLA polymer were selected to produce a smart business card stand. The temperature indicator capability was analysed based on examining colour changes as a function of temperature changes. The sunlight/UV indicator capability was analysed based on the inspection of colour change as a function of absorbed sun/ultraviolet light. The electrical conductivity of the conductive PLA polymer was examined by performing resistance measurements. All three objects were successfully produced and their functionality was demonstrated. We hope that these examples will catalyse the expansion of FFF 4D printed SRP applications, as much work remains to be done in designing the parts and developing FFF printing parameters that take advantage of the stimuli-responsive materials currently being developed for FFF technology.

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Section: Stimuli-responsive Polymers and Selected Applicationsmentioning

confidence: 99%

Selected Applications of Stimuli-Responsive Polymers: 4D Printing by the Fused Filament Fabrication Technology

et al. 2020

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“…The responsiveness of polymer vehicles to pH changes are commonly used in the treatment of cancer cells due to their acidic reaction, which is an opposite to alkaline environment in healthy cells [ 16 ]. Additionally, the unhealthy cells usually gain higher temperature, which is exploited by temperature-responsive polymer carriers for specific behavior in the conditions of their lower or upper critical solution temperature [ 17 ]. Mechanisms based on ionic strength are characteristic for polymers containing ionic groups.…”

Section: Introductionmentioning

confidence: 99%

Linear Copolymers Based on Choline Ionic Liquid Carrying Anti-Tuberculosis Drugs: Influence of Anion Type on Physicochemical Properties and Drug Release

Niesyto

Neugebauer

2020

IJMS

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In this study, drug nanocarriers were designed using linear copolymers with different contents of cholinium-based ionic liquid units, i.e., [2-(methacryloyloxy)ethyl]trimethylammonium chloride (TMAMA/Cl: 25, 50, and 75 mol%). The amphiphilicity of the copolymers was evaluated on the basis of their critical micelle concentration (CMC = 0.055–0.079 mg/mL), and their hydrophilicities were determined by water contact angles (WCA = 17°–46°). The chloride anions in the polymer chain were involved in ionic exchange reactions to introduce pharmaceutical anions, i.e., p-aminosalicylate (PAS−), clavulanate (CLV−), piperacillin (PIP−), and fusidate (FUS−), which are established antibacterial agents for treating lung and respiratory diseases. The exchange reaction efficiency decreased in the following order: CLV− > PAS− > PIP− >> FUS−. The hydrophilicity of the ionic drug conjugates was slightly reduced, as indicated by the increased WCA values. The major fraction of particles with sizes ~20 nm was detected in systems with at least 50% TMAMA carrying PAS or PIP. The influence of the drug character and carrier structure was also observed in the kinetic profiles of the release processes driven by the exchange with phosphate anions (0.5–6.4 μg/mL). The obtained polymer-drug ionic conjugates (especially that with PAS) are promising carriers with potential medical applications.

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“…Smart materials, also called intelligent materials, can sense external stimuli, such as light, temperature, pH, stress, strain, chemical, nuclear radiation, electric fields, and magnetic fields. In particular, these types of materials can usually select and control the degree of response according to the design requirement, and can quickly go back to their initial phase when the external stimulus is eliminated [1][2][3]. Among various smart materials, the electric field-responsive smart particle suspension, called an electrorheological (ER) fluid, can change state from liquid-like to solid-like immediately and reversibly with an applied electrical field [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Nanoparticles Functionalized by Conducting Polymers and Their Electrorheological and Magnetorheological Applications

et al. 2020

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Conducting polymer-coated nanoparticles used in electrorheological (ER) and magnetorheological (MR) fluids are reviewed along with their fabrication methods, morphologies, thermal properties, sedimentation stabilities, dielectric properties, and ER and MR characteristics under applied electric or magnetic fields. After functionalization of the conducting polymers, the nanoparticles exhibited properties suitable for use as ER materials, and materials in which magnetic particles are used as a core could also be applied as MR materials. The conducting polymers covered in this study included polyaniline and its derivatives, poly(3,4-ethylenedioxythiophene), poly(3-octylthiophene), polypyrrole, and poly(diphenylamine). The modified nanoparticles included polystyrene, poly(methyl methacrylate), silica, titanium dioxide, maghemite, magnetite, and nanoclay. This article reviews many core-shell structured conducting polymer-coated nanoparticles used in ER and MR fluids and is expected to contribute to the understanding and development of ER and MR materials.

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The light-controlling of temperature-responsivity in stimuli-responsive polymers

Abstract: Light-controlling of phase separation in temperature-responsive polymer solutions by using light-responsive materials for reversible controlling physical and chemical properties of the media with an out-of-system stimulus with tunable intensity.

Cited by 152 publications

References 257 publications

Selected Applications of Stimuli-Responsive Polymers: 4D Printing by the Fused Filament Fabrication Technology

Selected Applications of Stimuli-Responsive Polymers: 4D Printing by the Fused Filament Fabrication Technology

Linear Copolymers Based on Choline Ionic Liquid Carrying Anti-Tuberculosis Drugs: Influence of Anion Type on Physicochemical Properties and Drug Release

Nanoparticles Functionalized by Conducting Polymers and Their Electrorheological and Magnetorheological Applications

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