Results 191 to 200 of about 6,865 (206)

Preparation and Characterization of Photo-Cross-Linked Thermosensitive PNIPAAm Nanogels

Macromolecules, 2006
Thermosensitive nanogels were prepared from photo-cross-linkable copolymers of N-isopropyl-acrylamide (NIPAAm) and 2-dimethylmaleinimido ethylacrylamide (DMIAAm). The colloidal nanogels were formed by UV-irradiated solutions of thermosensitive polymers in water at 45 °C.
Ruckling, D., Vo, C. D., Adler, H. J P, Völkel, A., Cölfen, H.   +4 more
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Temperature-Sensitive Nanogels PNIPAAm/DMA Prepared and Research

Advanced Materials Research, 2012
There have much study about thermo-responsive nanogels,which exhibit temperature-controlled volume phase transitions.There have been few reports,however,of electrostatically neutral,thermosensitive nanogels with a high composition of hydrophilic monomer.Here,we describe the synthesis and characterization of a new class of nonionic copolymer nanogels ...
Hai Yan Wang, Qian Liao, Qiao Lan Shao, Gao Qiu, Xi Hua Lu   +4 more
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Thermally reversible shape transformation of nano-patterned PNIPAAm hydrogel

Polymer Bulletin, 2020
In the field of stimuli-responsive polymer research, poly-N-isopropylacrylamide (PNIPAAm) has been widely studied, because this material has unique properties which respond to temperatures near to that of the human body, approximately 36 °C. In this study, a nano-patterned PNIPAAm hydrogel was prepared using UV-irradiation and soft lithography ...
Byulhana Kim, Jung-Soo Lee
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Tannic Acid Mediated Suppression of PNIPAAm Microgels Thermoresponsive Behavior

Macromolecules, 2011
Tannic acid (TA) complexation with poly(N-isopropylacrylamide) (PNIPAAm) microgels changed their morphology and temperature responsiveness, depending on TA concentration and pH (below the TA pKa).
Eunice Costa, Margarida Coelho, Laura M. Ilharco, Ana Aguiar-Ricardo, Paula T. Hammond   +4 more
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Thermo-Responsive PNiPAAm-g-PEG Films for Controlled Cell Detachment

Biomacromolecules, 2003
A series of graft copolymers consisting of either poly(N-isopropylacrylamide) (PNiPAAm) or poly(N,N-diethylacrylamide) (PDEAAm) as a thermo-responsive component in the polymer backbone and poly(ethyleneglycol) (PEG) were immobilized as thin films and cross-linked on a fluoropolymer substrate using low-pressure argon plasma treatment.
Dirk, Schmaljohann, Joachim, Oswald, Birgitte, Jørgensen, Mirko, Nitschke, Detlev, Beyerlein, Carsten, Werner   +5 more
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Novel ABA type gold copolymer nanoparticles: PNIPAAm-b-PU-b-PNIPAAm tri-block nanopolymer as reducing and stabilizing agent

AIP Conference Proceedings, 2012
Block copolymers have been used extensively in the synthesis of different types of nanoparticles. A novel ABA type tri-block nanopolymer PNIPAAm-b-PU-b-PNIPAAm has been synthesized via atom transfer radical polymerization (ATRP) technique, using a tertiary bromo-terminated as a macroinitiator.
Prashant Singh, Hemant Verma, Chaitnaya Kumar, Kamlesh Kumari, Gopal K. Mehrotra, Ramesh Chandra, K. Tharanikkarrasu   +6 more
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Synthesis, characterization and controlled drug release of thermosensitive IPN–PNIPAAm hydrogels

Biomaterials, 2004
A method was developed to prepare thermosensitive poly(N-isopropylacrylamide) (PNIPAAm) hydrogels with an interpenetrating polymer network (IPN) structure for the purpose of improving its mechanical properties, response rate to temperature and sustained release of drugs.
Xian-Zheng, Zhang, Da-Qing, Wu, Chih-Chang, Chu   +2 more
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Loose‐Fit Polypseudorotaxanes Fabricated by γ‐CDs Threaded Onto a Single PNIPAAm‐PEG‐PNIPAAm Chain in Aqueous Solution

Macromolecular Chemistry and Physics, 2012
AbstractWhen γ‐CDs are added to an aqueous solution of PNIPAAm‐b‐PEG‐b‐PNIPAAm block copolymer, they are threaded onto the polymer chains to give loose‐fit polypseudorotaxanes (PPRs). The inclusion complexation shows a marked dependence on the length of the PNIPAAm blocks although the threaded γ‐CDs are preferably located on the central PEG block.
Peng Gao, Jin Wang, Pei‐Jing Wang, Lin Ye, Ai‐Ying Zhang, Zeng‐Guo Feng   +5 more
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Fabrication and characterization of microgel-impregnated, thermosensitive PNIPAAm hydrogels

Polymer, 2005
Abstract Poly(N-isopropylacrylamide)/poly(ethylene glycol) diacrylate (PNIPAAm/PEG-DA) microgels were used as an additive during the polymerization and/or crosslinking of PNIPAAm hydrogels to improve their thermosensitive properties. The influence of this additive on the property of resulting PNIPAAm hydrogels was investigated and characterized.
Xian-Zheng Zhang, Chih-Chang Chu
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Hybrid collagen/pNIPAAM hydrogel nanocomposites for tissue engineering application

Colloid and Polymer Science, 2018
The present work explores new hybrid bioactive, enzymatically degradable hydrogel nanocomposites. They are composed by stimuli-sensitive semi-interpenetrating collagen/poly(N-isopropyl acrylamide) polymeric matrix, Dellite® 67G and Cloisite® 93A nanoclays, and hydroxyapatite particles.
Nistor Manuela Tatiana, Vasile Cornelia, Rodica Tatia, Chiriac Aurica   +3 more
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