fabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: fabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
fabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
Materials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewimulus-Responsive Polymer Films and Patterns on Surfaces: A ReviewJem-Kun Chen 1 and Chi-Jung Chang *■*1 Department of Materials Science and Engineering, National Taiwan University of Science andTechnology. 13. Section I. Keclung Road. Taipei 106. Taiwan; E-Mail: jkclicu(amail.nlust.cdu.lw■ Departme fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewnt of Chemical Engineering, Feng Chia University. 100 Wenhwa Road. Seatwen. Taichung 40724. Taiwan* Author to whom correspondence should be addressed:fabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
E-Mail: changcj^ifcu.edu.tw;rd.: +886-1-2151-7250 (ext. 3678); Tax: +886-1-2'151-0890.Received: 26 November 2013: in revisedform: 10 January 2014/AccMaterials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewmance stimuli-responsive polymeric materials. This review focuses on recent developments in the preparation and application of patterned slimuh-responsivc polymers, including thermoresponsive layers. pH ionic-responsive hydrogels, photo-responsive film, magnetically-responsive composites, electroact fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewive composites, and solvent-responsive composites. Many important new applications for stimuli-rcsponsive polymers he HI the field of nano- and micro-fabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
fabrication, where stimuli-responsive polymers are being established as important manipulation tools. Some techniques have been developed to selectiveMaterials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewstinmli-responsive hydrogels, including photolithography, electron beam lithography, scanning probe writing, and printing tecluuques (microcontact printing, ink-jet printing) were surveyed. We also surveyed the applications of nanostructured stimuli-responsive hydrogels, such as biotechnology (biolo fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewgical interfaces and purification of biomacromoles), switchable wettability, sensors (optical sensors, biosensors, chemical sensors), and actuators.Kefabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
ywords:thenuore spoils ive;pH-responsive; photo-responsive; polymer;magnetically-responsiveMaterials 2014. 7806Ỉ. IntroductionMother Nature shows US aMaterials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewp snap shut on doomed insect prey: the leaflets of Codanocalyx motorius rotate, and sunflowers turn toward the sun: and chameleons change color according to their environment. At their most fundamental level, many of the most important substances in living systems are macromolecules with structures fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewand behavior's that vary according to the conditions in the surrounding environment. Mimicking the functions of such organisms, scientists have made gfabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
reat efforts to synthesize stimuli-responsive polymers that have significance to science arid promising applications. Incorporating multiple copies ofMaterials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewy minor changes in chemical stmcnire to be synergistically amplified to bring about dramatic transformations ill macroscopic material properties.Polymers such as proteins, polysaccharides, and nucleic acids are present as basic components in living organic systems. Synthetic polymers, which are desi fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewgned to mimic these biopolymers, have been developed into a variety of functional forms to meet industrial and scientific applications, lhese synthetifabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
c polymers can be classified into different categories based on their chemical properties. Certain special types of polymers have emerged as very usetMaterials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a revieween variously called stimuli-sensitive [I J, intelligent |2J, smart |3,4J, or cm noiimcnlally-sensilivc polymers [51- SRPs can rapidly change shape with respect to configuration or dimension under the influence of stimuli such as temperature [6], pH value [7.81, light [91. magnetic field [10], elect fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewricity [I I J, and solvent water [I2J. These polymers can also have different compositions and architecture, including not only homopolymers [131 butfabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
also statistical block copolymers [1 11, graft copolymers, and molecular brushes. They can be also grafted on horn surfaces [15] or be used as chemicaMaterials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewreversible self-assembly into polymeric micelles or vesicles. Given these unique properties, stimuli-rcspoiisivc polymers are being developed for use in such fields as drug delivery, cell adhesion, sensors, actuator systems, releasing of encapsulated materials and trafficking of molecules through po fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewlymeric membranes [18-231-The “response” of a polymer can be defined in various ways. SRPs in solution are typically classified as those that change tfabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
hen individual chain dimensions size, secondary structure, solubility, or the degree of intennolecular association. In most cases, the physical or cheMaterials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewstatic interactions, etc.), simple reactions (e.g., acid-base reactions) of moieties pendant to the polymer backbone, and or osmotic pressure differentials that result from such phenomena. In other systems, the definition of a response can lie expanded to include more dramatic alterations in the pol fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewymeric structure. In the past decade, many breakthroughs have been made in developing SPRs with novel stimulus-active mechanisms. This article reviewsfabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
the mechanisms and fabrication strategies of stimulus active polymers that are sensitive to heat, light, electrical field, magnetic field, and solvenMaterials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewlar ordering of the switching components via self-assembly is an excellent strategy. Switching primarily requires organization of individual molecules into a cooperative function, which leads to an amplification of the switching effect. Typically, each molecule contains a functional group that is re fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewsponsive to stimuli, two components that create differing property-states, and a group that anchors the molecule to the surface SRPs based on monolayefabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
rs are designed by taking advantage of reversible (i) attaclunent-detaclnnenl of monolayer molecules [211: (11) conformational changes [251; or (iii) Materials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewh stnuuh-responsix cncss.2.1. Ihermoresponsive LayersDue to the relative case of control, temperature is the most widely used external stimulus in synthetic and bio-mspned. stimulus-responsive systems. Many temperature-responsive polymers exhibit a critical solution temperature at which the polymer fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewchanges phase. Tf the polymer undergoes a phase transition from a soluble stale to an insoluble stale above the critical temperature. 11 is characterifabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
zed as having a lower critical solution temperature (LCST); if the polymer transitions hour an insoluble stare to a soluble state with increasing tempMaterials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewey arc soluble in a solvent (waler) al low temperatures but become insoluble as the temperature rises above the Ĩ.CST [28J.Ihcrmally-responsive polymers can be classified into different gloups depending on the mechanism and chemistry of die gloups, lhese arc (a) poly(N-alkyl substituted acry lamides fabrications and applications of stimulus responsive polymer films and patterns on surfaces a review), e.g.. poly(N-isopropy-lacrylamide) with an T.CST of .32 °C [29J; and (b) poly (N-vinylalkylamides), c.g.. poly(N-Miiy lcapiolaclani), with an LCSTfabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
of about 32-35 uc according to die molecular mass of the polymer [30J. Figure I shows respective N-substituted polyamides according to the substitutioMaterials 2014. 7. 805-875; doi 10.3390 ma7020805OPEN ACCESSmaterialsISSN 1996-1944 www.mdpi.com journal materialsFabrications and Applications of Sti fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewwidely studied for its ability to switch surface wettability [31 J. Tills effect is explained by changes in the competition between intermolecular and intramolecular hydrogen bonding below and above the T.CST. Below the T.CST. the predominantly inleiniolccular hy drogen bonding between the PN1PAAM c fabrications and applications of stimulus responsive polymer films and patterns on surfaces a reviewhains and water molecules contributes to the hydrophilicity of PNIPAAM brush films. Above the I.CST. intramolecular hydrogen bonding between c=o and Nfabrications and applications of stimulus responsive polymer films and patterns on surfaces a review
H groups in the PNIPAAM chains results in a compact and hy drophob ically collapsed conformation of PN1PAAM chains, rendering the blush surface hydroGọi ngay
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