Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Photo-responsive polymers

Photoinduced swelling of the polymer can be studied by illumination of the polymer, followed by a period with the illumination off [127]. [Pg.784]

Light is a desirable external stimulus for drug delivery systems because it is inexpensive and easily controlled. Light-regulated molecular switches that reversibly control biomolecular function could provide new opportunities for controlling activity in diagnostics, therapeutics, and targeting [129]. [Pg.784]

Feng et al. prepared polymeric nanoparticles with a core of hydrophobic azobenzene-containing acrylate units and a shell [Pg.785]

Brasch et al. reported the encapsulation of a stimuli-responsive self-immolative polymer within virus-like assemblies of Cowpea Chlorotic Mottle Virus [134]. Upon photo-irradiation, the self-immolative polymer undergoes a head-to-tail depolymerization [Pg.786]

In a study, using the inclusion complex of trans azobenzene and cyclodextrin as a photo-switchable cross-linker, a dextran based photo-responsive hydrogel system has been constructed and employed for a light controlled protein release system [136]. [Pg.787]

The efficiency of energy conversion in the polymers, i.e. how much the change in shape of the chain is induced by a photon, is, however, rather low. They need many photons and a high content of pendant photochromic chromophores to induce a large conformation change. To make a sensitive photo-responsive polymer, i.e. one which responds more efficiently to fewer photons, it is necessary to introduce an amplification mechanism to the system. One possible way of achieving this is to utilize the phase transition of polymers [7,8]. [Pg.50]

Photo-responsive polymers are materials that are able to respond to light irradiation by undergoing reversible changes in their chemical stmctures and/or their physical properties. Also, photochromism refers to the photo-induced reversible transformations in chemical compounds between two... [Pg.750]

Reversibly Photo-Responsive Polymer Surfaces for Controlled Wettability... [Pg.217]

Photo-responsive polymers properties, synthesis and applications... [Pg.93]

Key words photo-responsive polymer, phototriggers, drug delivery, hydrogel, polymer actuators. [Pg.93]

From the viewpoint of chemical structure, several key types of photo-responsive polymers were collected. [Pg.96]

Figure 4.7 exhibits examples of diblock copolymers with irreversible photo-response. Polymer 30 contains photolabile protecting groups attached to carboxylic groups in the side chains. Upon UV irradiation, photosolvolysis of the pyrenylmethyl ester occurs, 1-pyrenemethanol is cleaved from the polymer chain and carboxylic add groups are released. As a consequence, the hydrophobic block turns into a hydrophilic PMAA block. Core-shell micelles formed by 30 disappeared after irradiation with UV light at 365 nm. This design was further validated with other chromophores (polymers 31-34). °... [Pg.105]

The future of photo-responsive polymers and smart materials derived from them will depend on the research development in different directions. The development of photo-responsive units acts as the engine of photo-... [Pg.126]

Field-responsive polymers electro- and photo-responsive polymers... [Pg.363]

See other pages where Photo-responsive polymers is mentioned: [Pg.1]    [Pg.750]    [Pg.751]    [Pg.753]    [Pg.755]    [Pg.757]    [Pg.759]    [Pg.761]    [Pg.763]    [Pg.765]    [Pg.10]    [Pg.93]    [Pg.93]    [Pg.94]    [Pg.94]    [Pg.95]    [Pg.96]    [Pg.99]    [Pg.101]    [Pg.103]    [Pg.105]    [Pg.109]    [Pg.111]    [Pg.113]    [Pg.115]    [Pg.117]    [Pg.119]    [Pg.121]    [Pg.125]    [Pg.127]    [Pg.129]    [Pg.131]    [Pg.133]   
See also in sourсe #XX -- [ Pg.750 , Pg.751 , Pg.752 , Pg.753 , Pg.754 , Pg.755 , Pg.756 , Pg.757 , Pg.758 , Pg.759 , Pg.760 , Pg.761 , Pg.762 , Pg.763 , Pg.764 , Pg.765 ]



SEARCH



Key types and properties of photo-responsive polymers

Photo-response

Photo-responsive polymers actuation

Photo-responsive polymers applications

Photo-responsive polymers copolymers

Photo-responsive polymers properties, synthesis and applications

Polymer photo

Responsive polymers

© 2024 chempedia.info