نتایج جستجو برای: smart polymers

تعداد نتایج: 144747  

Journal: :Aggregate 2022

Topological metamorphosis represents a powerful approach to modulate the properties of polymers. However, it still remains major challenge achieve tunability bulk mechanical via topological transformation in supramolecular polymer systems. Herein, we couple covalent and single system—referred as covalent-and-supramolecular (CSP)—to realize thermo-responsive macromolecular metamorphosis. The CSP...

Journal: :Journal of polymer science 2023

Self-healing polymer materials have been a research hotspot in the field of smart since their invention. They self-diagnostic functions and are capable self-healing small cracks. By applying to flexible electronic devices, mechanical damage caused by bending, folding scratching these devices can be reduced. The reliability service life could improved accordingly. This paper provides brief overv...

Journal: :Soft matter 2015
Wen-Ming Wan Peng Zhou Fei Cheng Xiao-Li Sun Xin-Hu Lv Kang-Kang Li Hai Xu Miao Sun Frieder Jäkle

The thermo-responsive properties of borinic acid polymers were investigated by experimental and molecular dynamics simulation studies. The homopolymer poly(styrylphenyl(tri-iso-propylphenyl)borinic acid) (PBA) exhibits an upper critical solution temperature (UCST) in polar organic solvents that is tunable over a wide temperature range by addition of small amounts of H2O. The UCST of a 1 mg mL(-...

Journal: :Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques 2012
Hugo Almeida Maria Helena Amaral Paulo Lobão José Manuel Sousa Lobo

Topical drug treatment aims at providing high concentrations of drugs at the site of application so as to avoid adverse systemic effects associated with oral administration. Smart polymers, or stimuli-responsive polymers, are able to respond to a stimulus by showing physical or chemical changes in their behaviour as, for example, the delivery of the drug carried by them. The thermo-responsive n...

Journal: :ACS applied materials & interfaces 2017
Ben Zhang Janae E DeBartolo Jie Song

Maintaining adequate or enhancing mechanical properties of shape memory polymers (SMPs) after shape recovery in an aqueous environment are greatly desired for biomedical applications of SMPs as self-fitting tissue scaffolds or minimally invasive surgical implants. Here we report stable temporary shape fixing and facile shape recovery of biodegradable triblock amphiphilic SMPs containing a poly(...

Journal: :ECS Journal of Solid State Science and Technology 2021

Among several detection techniques, fluorescence based optical sensors are regarded as superior owing to distinct features like simplicity, remarkable sensitivity and prompt signal response time. Signal amplification remains most effective strategy further boost the performance of such sensors. Thanks unique light–harvesting energy transfer properties conjugated polymers (CPs) which make them p...

2010
A. Sharma R. Sharma

Organic polymeric composite materials are useful in applications sucgh as light emitting diodes, electrochromic displays, smart windows, and field transistors, electromagnetic interference shielding devices, energy storage products such as batteries, super capacitors and fuel cells. Nanoparticles of conducting polymers are formed by chemical or electrochemical synthesis by precipitation, crysta...

2011
Xiaohua Wang Xin Wang Rodolfo Fernandez Mingdi Yan Andres La Rosa

Inspired by the fascinating working process of living systems, materials that can respond to external stimuli (mechanical, chemical, optical changes in environmental conditions, etc.) are of enormous interest owing to their applications in a wide range of fields including microfluidic devices, drug delivery, tissue engineering, sensors and actuators. This review, while being non-exhaustive in l...

Journal: :Journal of the American Chemical Society 2010
Joshua S Katz Sheng Zhong Brendon G Ricart Darrin J Pochan Daniel A Hammer Jason A Burdick

Polymer vesicles, or polymersomes, are promising candidates for applications in drug delivery and tissue imaging. While a vast variety of polymers have been explored for their ability to assemble into polymersomes, relatively little research on the functionalization of these polymers has been reported. We present here a novel route for the synthesis of poly(caprolactone)-b-poly(ethylene glycol)...

2012
Liang Hu Michael J. Serpe

Poly (N-isopropylacrylamide) (pNIPAm) is one of the most completely studied “smart” polymers due to its unique reversible thermoresponsivity.That is, when pNIPAm in water is heated > ~31°C, it transits from a random coil to a globule conformation; this transition is reversed when T < ~31°C. This conformational change is accompanied by water exchange process. When pNIPAm undergoes the coil to gl...

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