pH-, Sugar-, and Temperature-Sensitive Electrochemical Switch Amplified by Enzymatic Reaction and Controlled by Logic Gates Based on Semi-Interpenetrating Polymer Networks

2012 ◽  
Vol 116 (5) ◽  
pp. 1700-1708 ◽  
Author(s):  
Dan Liu ◽  
Hongyun Liu ◽  
Naifei Hu
Keyword(s):  
Polymer Networks ◽  
Enzymatic Reaction ◽  
Logic Gates ◽  
Interpenetrating Polymer Networks ◽  
Temperature Sensitive

Synthesis and swelling properties of pH- and temperature-sensitive interpenetrating polymer networks composed of polyacrylamide and poly(γ-glutamic acid)

2010 ◽  
Vol 119 (6) ◽  
pp. 3531-3537 ◽  
Author(s):  
D. E. Rodríguez-Félix ◽  
M. M. Castillo-Ortega ◽  
D. Real-Félix ◽  
J. Romero-García ◽  
A. S. Ledezma-Pérez ◽  
...  
Keyword(s):  
Glutamic Acid ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Temperature Sensitive ◽  
Swelling Properties

scholarly journals Chemical-Physical Behaviour of Microgels Made of Interpenetrating Polymer Networks of PNIPAM and Poly(acrylic Acid)

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1353
Author(s):  
Valentina Nigro ◽  
Roberta Angelini ◽  
Monica Bertoldo ◽  
Elena Buratti ◽  
Silvia Franco ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Polymer Networks ◽  
Experimental Studies ◽  
Interpenetrating Polymer Networks ◽  
Temperature Sensitive ◽  
Particle Structure ◽  
Ionic Charge ◽  
Stimuli Responsive Polymers ◽  
Dual Responsive ◽  
Poly Acrylic Acid

Microgels composed of stimuli responsive polymers have attracted worthwhile interest as model colloids for theorethical and experimental studies and for nanotechnological applications. A deep knowledge of their behaviour is fundamental for the design of new materials. Here we report the current understanding of a dual responsive microgel composed of poly(N-isopropylacrylamide) (PNIPAM), a temperature sensitive polymer, and poly(acrylic acid) (PAAc), a pH sensitive polymer, at different temperatures, PAAc contents, concentrations, solvents and pH. The combination of multiple techniques as Dynamic Light Scattering (DLS), Raman spectroscopy, Small Angle Neutron Scattering (SANS), rheology and electrophoretic measurements allow to investigate the hydrodynamic radius behaviour across the typical Volume Phase Transition (VPT), the involved molecular mechanism and the internal particle structure together with the viscoelastic properties and the role of ionic charge in the aggregation phenomena.

scholarly journals The microscopic distribution of hydrophilic polymers in interpenetrating polymer networks (IPNs) of medical grade silicone

Polymer ◽  
2021 ◽  
Vol 224 ◽  
pp. 123671
Author(s):  
Gregory N. Smith ◽  
Erik Brok ◽  
Martin Schmiele ◽  
Kell Mortensen ◽  
Wim G. Bouwman ◽  
...  
Keyword(s):  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Hydrophilic Polymers ◽  
Microscopic Distribution ◽  
Medical Grade

scholarly journals Digital logic gates in soft, conductive mechanical metamaterials

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Charles El Helou ◽  
Philip R. Buskohl ◽  
Christopher E. Tabor ◽  
Ryan L. Harne
Keyword(s):  
Integrated Circuits ◽  
Electronic Materials ◽  
Polymer Networks ◽  
Conductive Polymer ◽  
Network Connectivity ◽  
Logic Gates ◽  
Boolean Logic ◽  
Digital Logic ◽  
Mechanical Metamaterials ◽  
Logic Operations

AbstractIntegrated circuits utilize networked logic gates to compute Boolean logic operations that are the foundation of modern computation and electronics. With the emergence of flexible electronic materials and devices, an opportunity exists to formulate digital logic from compliant, conductive materials. Here, we introduce a general method of leveraging cellular, mechanical metamaterials composed of conductive polymers to realize all digital logic gates and gate assemblies. We establish a method for applying conductive polymer networks to metamaterial constituents and correlate mechanical buckling modes with network connectivity. With this foundation, each of the conventional logic gates is realized in an equivalent mechanical metamaterial, leading to soft, conductive matter that thinks about applied mechanical stress. These findings may advance the growing fields of soft robotics and smart mechanical matter, and may be leveraged across length scales and physics.

Organic-solvent-free electromembrane extraction based on semi-interpenetrating polymer networks

2021 ◽  
Author(s):  
Hang Mei ◽  
Huajing Liu ◽  
Qianqian Shang ◽  
Ying Dong ◽  
Stig Pedersen-Bjergaard ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Solvent Free ◽  
Electromembrane Extraction ◽  
Acidic Analytes

A versatile organic-solvent-free electromembrane extraction (EME) system, which could be successfully used for the extraction of both basic and acidic analytes, is proposed based on semi-interpenetrating polymer networks.

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