Results 131 to 140 of about 2,523 (182)

Tailoring the LCST of PNIPAAM‐b‐PLA‐b‐PNIPAAM Triblock Copolymers via Stereocomplexation

Macromolecular Rapid Communications, 2013
Poly(N‐isopropylacrylamide)‐block‐poly(l‐lactic acid)‐block‐poly(N‐isopropylacrylamide) (PNIPAAM‐b‐PLLA‐b‐PNIPAAM) and PNIPAAM‐b‐PDLA‐b‐PNIPAAM triblock copolymers with varying polylactic acid (PLA) lengths are synthesized using a combination of ring‐opening polymerization and atom‐transfer radical polymerization.
Zhang, X., Tan, B.H., He, C.
openaire   +2 more sources

Thermosensitive polymeric vesicles self-assembled by PNIPAAm-b-PPG-b-PNIPAAm triblock copolymers

Colloid and Polymer Science, 2004
PNIPAAm-b-PPG-b-PNIPAAm triblock copolymers were prepared by redox polymerization. The self-assembly behavior and thermosensitive property of the copolymers in water were studied using 1H-NMR, TEM and a UV spectrophotometer. The results showed that the LCST of the copolymers was 32 °C, which was consistent with that of pure PNIPAAm.
Xiangrong Chen, Xiaobin Ding, Zhaohui Zheng, Yuxing Peng   +3 more
openaire   +1 more source

Salt Sensitivity of the Thermoresponsive Behavior of PNIPAAm Brushes

Langmuir, 2018
We report investigations on the salt sensitivity of the thermoresponsive behavior of PNIPAAm brushes applying the quartz crystal microbalance coupled with spectroscopic ellipsometry technique. This approach enables a detailed study of the optical and mechanical behavior of the polymer coatings.
Meike Koenig, Keith Brian Rodenhausen, Sebastian Rauch, Eva Bittrich, Klaus-Jochen Eichhorn, Mathias Schubert, Manfred Stamm, Petra Uhlmann   +7 more
openaire   +3 more sources

Understanding the Diffusion of Dextrans in ‘Click’ PNIPAAm Hydrogels

Australian Journal of Chemistry, 2013
Arguably the most important property of a hydrogel is the ability to allow the diffusion of solutes through the crosslinked network. Studies of the diffusion in hydrogels are important for providing information on the rate and extent of the passage of the solute and on the details of the microstructure of the hydrogel.
Ooi, Huey Wen, Peng, Hui, Jack, Kevin S., Whittaker, Andrew K.   +3 more
openaire   +4 more sources

Preparation of thermosensitive PNIPAAm hydrogels with superfast response

Chemical Communications, 2004
A simple, effective strategy was developed and demonstrated to prepare thermosensitive poly(N-isopropylacrylamide) (PNIPAAm) hydrogel with a superfast response by using an organic solvent, tetrahydrofuran (THF), as a foaming agent as well as a precipitation agent during the polymerization/crosslinking in water at room temperature.
Xian-Zheng, Zhang, Chih-Chang, Chu
openaire   +2 more sources

RAFT preparation and self-assembly behavior of thermosensitive triblock PNIPAAm-b-PODA-b-PNIPAAm copolymers

Colloid and Polymer Science, 2016
A series of well-defined thermoresponsive ABA-type triblock copolymers poly(N-isopropylacrylamide)-b-poly(n-octadecylacrylate)-b-poly(N-isopropylacrylamide) (PNIPAAm-b-PODA-b-PNIPAAm) consisting of two blocks of PNIPAAm and one block of PODA in different ratio are prepared via reversible addition-fragmentation chain transfer (RAFT) polymerization.
Jie Wu, Xuejiao Sun, Ruling Zhang, Shichao Yuan, Zongmei Wu, Qingliang Lu, Yueqin Yu   +6 more
openaire   +1 more source

Peptide–PNIPAAm conjugate based hydrogels: synthesis and characterisation

Soft Matter, 2011
Thermo-responsive PNIPAAm rich hydrogels with controllable properties have been prepared by introducing small quantities of peptide-PNIPAAm bioconjugates where the peptide self-assembled into a β-sheet rich fibrillar network. This was achieved in a one pot synthesis using a thiol-modified peptide as the chain-transfer agent in the free radical ...
Maslovskis, Antons, Tirelli, Nicola, Saiani, Alberto; id_orcid 0000-0002-5504-8306, Saiani, Aline; id_orcid 0000-0003-2731-3536   +3 more
openaire   +2 more sources

“Click” PNIPAAm hydrogels – a comprehensive study of structure and properties

Polymer Chemistry, 2013
A detailed understanding of the structural and chemical features of hydrogels is vital when it comes to modifying and tailoring these materials into potential beneficial tools for different disciplines, such as drug delivery, membrane science, etc. However the characterization of hydrogels using conventional analytical techniques is a major challenge ...
Ooi, Huey Wen, Jack, Kevin S., Peng, Hui, Whittaker, Andrew K.   +3 more
openaire   +4 more sources

Characterization and cell material interactions of PEGylated PNIPAAM nanoparticles

Colloids and Surfaces B: Biointerfaces, 2010
The aim of this study was to investigate the haemocompatibility of poly(N-isopropylacrylamide)-co-poly(ethylene glycol), PNIPAAM-PEG based nanoparticles and the influence of poly(ethylene glycol), PEG on the interactions of nanoparticles with cells.
Nany, Gulati, Rachna, Rastogi, Amit K, Dinda, Renu, Saxena, Veena, Koul   +4 more
openaire   +2 more sources

Thermosensitive PNIPAAm cryogel with superfast and stable oscillatory properties

Chemical Communications, 2003
Through copolymerization/crosslinking in dimethyl sulfoxide (DMSO) at temperature below the melting point of DMSO, we demonstrated a novel poly(N-isopropylacrylamide) (PNIPAAm) hydrogel with regularly oriented micromatrix; the superfast/stable oscillatory hydration-dehydration character of this hydrogel would find wide applications in biomedical field.
Xian-Zheng, Zhang, Chih-Chang, Chu
openaire   +2 more sources