Responsive Polymer Nanostructures

2017 ◽  
pp. 173-304 ◽  
Author(s):  
Yajnaseni Biswas ◽  
Somdeb Jana ◽  
Madhab Dule ◽  
Tarun K. Mandal
Keyword(s):  
Polymer Nanostructures ◽  
Responsive Polymer

Multi-Stimuli-Responsive Mesoporous Membranes and Effect of Molecular Architecture on Thermo- and pH-Responsive Behavior of the grafted Block Copolymer brushes

2019 ◽  
Author(s):  
Yanchun Tang ◽  
Kohzo Ito ◽  
Hideaki Yokoyama
Keyword(s):  
Polymer Brushes ◽  
Diblock Copolymers ◽  
Neutron Reflectivity ◽  
Molecular Architecture ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
The Matrix ◽  
Stable Part ◽  
Copolymer Brushes ◽  
Mesoporous Membranes

In this study, we prepared ultrafiltration membranes with a decoupled responses of filtration property to temperature and pH. The membrane preparation method was developed based on our previous work. We utilized methanol-supercritical carbon dioxide (methanol-scCO<sub>2</sub>) selective swelling method to introduce nanopores to block copolymers containing poly(diethylene glycol) methyl ether methacrylate (PMEO<sub>2</sub>MA), poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) and polystyrene (PS) blocks. Formation of the mesoporous barrier layer with PS being the mechanically stable part of the matrix was driven by selective swelling of the PMEO<sub>2</sub>MA-b-PDMAEMA domains. Due to the selective swelling of PMEO<sub>2</sub>MA or PDMAEMA domains to introduce pores, the interior of the pores are covered with PMEO<sub>2</sub>MA or PDMAEMA blocks after pore formation. The PMEO<sub>2</sub>MA-b-PDMAEMA polymer brushes are naturally attached on the pore walls and worked as functional gates. PMEO<sub>2</sub>MA is a non-toxic, neutral thermo-responsive polymer with LCST at 26 ᴼC. PDMAEMA is a typical weak polyelectrolyte with pK<sub>a</sub> value at 7.0-7.5 and also a thermo-responsive polymer revealed a LCST of 20-80 °C in aqueous solution. Therefore, these membranes were expected to have multi dimensions as function of the combination of temperature and pH. Moreover, to understand the detail of the temperature and pH depended conformation transitions of PMEO<sub>2</sub>MA-b-PDMAEMA brushes, those diblock copolymers were end-tethered on flat substrates and analyzed via neutron reflectivity (NR).

scholarly journals Thermo-responsive polymer encapsulated gold nanorods for single continuous wave laser-induced photodynamic/photothermal tumour therapy

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Beilei Gong ◽  
Yuanbing Shen ◽  
Huiyan Li ◽  
Xiaojun Li ◽  
Xia Huan ◽  
...  
Keyword(s):  
Gold Nanorods ◽  
Biomedical Applications ◽  
Continuous Wave ◽  
Continuous Wave Laser ◽  
Tumour Site ◽  
Polymer Shell ◽  
Potential System ◽  
Responsive Polymer ◽  
Good Biocompatibility ◽  
Spr Effect

AbstractOwing to strong and tunable surface plasmon resonance (SPR) effect and good biocompatibility, gold nanoparticles have been suggested to be a versatile platform for a broad range of biomedical applications. In this study, a new nanoplatform of thermo-responsive polymer encapsulated gold nanorods incorporating indocyanine green (ICG) was designed to couple the photothermal properties of gold nanorods (AuNRs) and the photodynamic properties of ICG to enhance the photodynamic/photothermal combination therapy (PDT/PTT). In addition to the significantly increased payload and enhancing photostability of ICG, the polymer shell in the nanoplatform also has thermo-responsive characteristics that can control the release of drugs at tumour sites upon the laser irradiation. On the basis of these improvements, the nanoplatform strongly increased drug aggregation at the tumour site and improved the photothermal/photodynamic therapeutic efficacy. These results suggest that this nanoplatform would be a great potential system for tumour imaging and antitumour therapy.

scholarly journals Kinetically Controlled Formation of Semi-crystalline Conjugated Polymer Nanostructures

2021 ◽  
Author(s):  
Peter Kei ◽  
Mitchell T. Howell ◽  
Carlos A. Chavez ◽  
Joseph C. Mai ◽  
Changwoo Do ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Polymer Nanostructures ◽  
Kinetically Controlled

Two‐Stage Size Decrease and Enhanced Photoacoustic Performance of Stimuli‐Responsive Polymer‐Gold Nanorod Assembly for Increased Tumor Penetration

2019 ◽  
Vol 29 (16) ◽  
pp. 1806429 ◽  
Author(s):  
Tianji Liu ◽  
Lingling Tong ◽  
Ningning Lv ◽  
Xiaoguang Ge ◽  
Qinrui Fu ◽  
...  
Keyword(s):  
Gold Nanorod ◽  
Stimuli Responsive ◽  
Two Stage ◽  
Tumor Penetration ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

An on–off biosensor based on multistimuli-responsive polymer films with a binary architecture and bioelectrocatalysis

2012 ◽  
Vol 173 ◽  
pp. 367-376 ◽  
Author(s):  
Kaina Zhang ◽  
Yan Liang ◽  
Dan Liu ◽  
Hongyun Liu
Keyword(s):  
Polymer Films ◽  
Responsive Polymer

scholarly journals Grafting of a Stimuli Responsive Polymer on Nanolayered Coextruded PS/PCL Films by Surface Initiated Polymerization

2016 ◽  
Vol 301 (7) ◽  
pp. 870-875 ◽  
Author(s):  
Katrina D. Pangilinan ◽  
Al Christopher C. de Leon ◽  
Joey Dacula Mangadlao ◽  
Eric Baer ◽  
Rigoberto C. Advincula
Keyword(s):  
Stimuli Responsive ◽  
Surface Initiated Polymerization ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer
Sign in / Sign up

Export Citation Format

Share Document