Rapid response of a poly(acrylamide) hydrogel having a semi-interpenetrating polymer network structure

2006 ◽  
Vol 17 (9-10) ◽  
pp. 794-797 ◽  
Author(s):  
Takashi Miyata ◽  
Noriko Asami ◽  
Kaori Okawa ◽  
Tadashi Uragami
Keyword(s):  
Network Structure ◽  
Polymer Network ◽  
Rapid Response ◽  
Interpenetrating Polymer Network ◽  
Poly Acrylamide

Synthesis and characterization of a novel wound dressing by PVP/ PAANa/chitosan with semi-interpenetrating polymer network structure

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Ying Wu ◽  
Qing Yang ◽  
Yali Gi ◽  
Yueting Zhang
Keyword(s):  
Network Structure ◽  
Wound Dressing ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Wound Dressings ◽  
Synthesis And Characterization ◽  
Cross Linking ◽  
Mass Ratio ◽  
Scanning Electron

AbstractA novel hydrogel wound dressing with semi-interpenetrating polymer network structure (semi-IPN) was prepared by radical polymerization of acrylic acid with potassium persulfate (K2S2O8) as initiator and N, N'-methylenebisacrylamide (MBA) as cross-linking agent in the presence of chitosan (CTS) and polyvinyl pyrrolidone (PVP). Hydrogels were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). SEM displayed semi- IPN hydrogels' creased surface with some scale-like wrinkles, thus improving the absorptive capability which has been considered as a most important characteristic of wound dressings. It was found that the content of cross-linking agent and the mass ratio of PVP and CTS had much influence on the mechanical properties of the hydrogel, varying from brittle plastics to elastomer due to the different degrees of cross linking. Since tensile strength is partly in inverse ratio to the hydrogel absorbent capability, the article offers an analysis of varying material proportion in order to obtain an optimum properties of the hydrogel wound dressing .

Temperature- and pH-tunable plasmonic properties and SERS efficiency of the silver nanoparticles within the dual stimuli-responsive microgels

2014 ◽  
Vol 2 (35) ◽  
pp. 7326-7335 ◽  
Author(s):  
Xiaoyun Liu ◽  
Xiuqin Wang ◽  
Liusheng Zha ◽  
Danli Lin ◽  
Jianmao Yang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Network Structure ◽  
Ph Value ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Stimuli Responsive ◽  
Plasmonic Property

Plasmonic property and SERS efficiency of the silver nanoparticles embedded within the microgels with an interpenetrating polymer network structure can be reversibly tuned by temperature and pH value.

scholarly journals pH/TEMPERATURE DUAL STIMULI RESPONSIVE MICROGELS BASED ON INTERPENETRATING POLYMER NETWORK STRUCTURE

2009 ◽  
Vol 009 (7) ◽  
pp. 638-644 ◽  
Author(s):  
Jun YANG ◽  
Xiao-yun LIU ◽  
Jie YAN ◽  
Lan LI ◽  
Liu-sheng ZHA
Keyword(s):  
Network Structure ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Stimuli Responsive

scholarly journals Magnetic thermally sensitive interpenetrating polymer network (IPN) nanogels: IPN-pNIPAm@Fe2O3-SiO2

RSC Advances ◽  
2020 ◽  
Vol 10 (63) ◽  
pp. 38287-38293
Author(s):  
Yun Teng ◽  
Philip W. T. Pong
Keyword(s):  
Iron Oxide ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Poly Acrylamide

In this paper, iron oxide-silica@poly(acrylamide-co-N,N-diethylacrylamide)/poly(N,N-diethylacrylamide) interpenetrating polymer network (IPN-pNIPAm@Fe2O3-SiO2) nanogels, possessing both magnetic and thermo-sensitive properties were successfully prepared.

Dry Etching Process on a Conducting Interpenetrating Polymer Network Actuator for a Flapping Fly Micro Robot

2011 ◽  
Author(s):  
Alexandre Khaldi ◽  
Ce´dric Plesse ◽  
Caroline Soyer ◽  
Eric Cattan ◽  
Fre´de´ric Vidal ◽  
...  
Keyword(s):  
Conducting Polymer ◽  
Polymer Network ◽  
Low Frequency ◽  
Dry Etching ◽  
Rapid Response ◽  
Etching Process ◽  
Interpenetrating Polymer Network ◽  
Flapping Wings ◽  
Micro Robot ◽  
Micro Actuators

In this paper we report on conducting polymer micro-actuators which have been fully patterned using photolithography and plasma dry etching processes. The interpenetrating polymer network (IPN) architecture used in this work resolves interface and adhesion problems which have been reported for traditional conducting polymer-based actuators. Actuator films 17 μm thick can be obtained and then patterned using microfabrication technologies. IPN-actuators were etched to obtain 2*5mm2 beams operating in air. These micro-sized actuators are potential candidates in numerous low frequency applications, including micro-valves, micro-optical instrumentation and micro-robotics. Moreover, due to the rapid response of our IPN architecture, this material has been considered as the main actuator for the flapping wings of an artificial insect.

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