scholarly journals In situ polymerized hyperbranched polymer reinforced poly(acrylic acid) hydrogels

2017 ◽  
Vol 1 (10) ◽  
pp. 1995-2004 ◽  
Author(s):  
Nazila Dehbari ◽  
Javad Tavakoli ◽  
Simranjeet Singh Khatrao ◽  
Youhong Tang
Keyword(s):  
Acrylic Acid ◽  
Hyperbranched Polymer ◽  
High Water ◽  
One Step ◽  
Water Swelling ◽  
Poly Acrylic Acid

A novel hyperbranched polymer reinforced poly(acrylic acid) hydrogel with high water swelling abilities was synthesized by one-step in situ polymerization.

DNA-Grafted Poly(acrylic acid) for One-Step DNA Functionalization of Iron Oxide Nanoparticles

Langmuir ◽  
2018 ◽  
Vol 34 (47) ◽  
pp. 14342-14346 ◽  
Author(s):  
Xiaole Hu ◽  
Chan-Jin Kim ◽  
Shine K. Albert ◽  
So-Jung Park
Keyword(s):  
Iron Oxide ◽  
Acrylic Acid ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
One Step ◽  
Poly Acrylic Acid ◽  
Dna Functionalization

scholarly journals The Anomalous Influence of Polyelectrolyte Concentration on the Deposition and Nanostructure of Poly(ethyleneimine)/Poly(acrylic acid) Multilayers

Molecules ◽  
2019 ◽  
Vol 24 (11) ◽  
pp. 2141 ◽  
Author(s):  
Martin Müller
Keyword(s):  
Acrylic Acid ◽  
Attenuated Total Reflection ◽  
Silicon Substrates ◽  
Acid Base ◽  
Exponential Relationship ◽  
Individual Adsorption ◽  
The Individual ◽  
Poly Acrylic Acid

The deposition and nanostructure of polyelectrolyte (PEL) multilayers (PEMs) of branched poly(ethyleneimine)/poly(acrylic acid) (PEI/PAA) onto silicon substrates was studied in terms of the dependence of pH and the PEL concentration (cPEL) in the individual adsorption steps z. Both a commercial automatic dipping device and a homebuilt automatic stream coating device (flow cell) were used. Gravimetry, SFM, transmission (TRANS) and in situ attenuated total reflection (ATR) FTIR spectroscopy were used for the quantitative determination of the adsorbed amount, thickness, chemical composition and morphology of deposited PEMs, respectively. Firstly, the combination of pH = 10 for PEI and pH = 4 for PAA, where both PEL were predominantly in the neutral state, resulted in an extraordinarily high PEM deposition, while pH combinations, where one PEL component was charged, resulted in a significantly lower PEM deposition. This was attributed to both PEL conformation effects and acid/base interactions between basic PEI and acidic PAA. Secondly, for that pH combination an exponential relationship between PEM thickness and adsorption step z was found. Thirdly, based on the results of three independent methods, the course of the deposited amount of a PEM-10 (z = 10) versus cPEL in the range 0.001 to 0.015 M at pH = 10/4 was non-monotonous showing a pronounced maximum at cPEL = 0.005 M. Analogously, for cPEL = 0.005 M a maximum of roughness and structure size was found. Fourthly, related to that finding, in situ ATR-FTIR measurements gave evidence for the release of outermost located PEI upon PAA immersion (even step) and of outermost PAA upon PEI immersion (odd step) under formation of PEL complexes in solution. These studies help us to prepare PEL-based films with a defined thickness and morphology for interaction with biofluids in the biomedical and food fields.

ABS Polymer Electroless Plating through a One-Step Poly(acrylic acid) Covalent Grafting

2010 ◽  
Vol 2 (4) ◽  
pp. 1177-1183 ◽  
Author(s):  
Alexandre Garcia ◽  
Thomas Berthelot ◽  
Pascal Viel ◽  
Alice Mesnage ◽  
Pascale Jégou ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Electroless Plating ◽  
Covalent Grafting ◽  
One Step ◽  
Poly Acrylic Acid

Biomass based hydrogel as an adsorbent for the fast removal of heavy metal ions from aqueous solutions

2017 ◽  
Vol 5 (7) ◽  
pp. 3434-3446 ◽  
Author(s):  
Mingyue Zhang ◽  
Lihua Song ◽  
Haifeng Jiang ◽  
Shu Li ◽  
Yifei Shao ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Acrylic Acid ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Low Cost ◽  
Waste Biomass ◽  
One Step ◽  
Fast Removal ◽  
Poly Acrylic Acid

In order to achieve the reutilization of waste biomass soybean dregs, a low-cost hydrogel, soybean dregs–poly(acrylic acid) (SESD–PAA) was prepared through a one-step reaction.

In situ polymerization induced supramolecular hydrogels of chitosan and poly(acrylic acid-acrylamide) with high toughness

2017 ◽  
Vol 1 (2) ◽  
pp. 310-318 ◽  
Author(s):  
Jin Li ◽  
Zhilong Su ◽  
Xiaodong Ma ◽  
Hongjie Xu ◽  
Zixing Shi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Acrylic Acid ◽  
Electrostatic Interaction ◽  
In Situ Polymerization ◽  
Supramolecular Hydrogel ◽  
High Toughness ◽  
Poly Acrylic Acid

A novel type of supramolecular hydrogel was developed byin situpolymerization of acrylic acid (AA) and acrylamide (AM) monomers in the aqueous solution of chitosan (CS) based on the dynamic electrostatic interaction of ions.

scholarly journals In Situ Nitroxide-Mediated Polymerized Poly(acrylic acid) as a Stabilizer/Compatibilizer Carbon Nanotube/Polymer Composites

2007 ◽  
Vol 2007 ◽  
pp. 1-12 ◽  
Author(s):  
Vitaliy Datsyuk ◽  
Laurent Billon ◽  
Christelle Guerret-Piécourt ◽  
Sylvie Dagréou ◽  
Nicolas Passade-Boupatt ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Acrylic Acid ◽  
Polymer Composites ◽  
Diblock Copolymers ◽  
Polymer Network ◽  
Electron Microscopies ◽  
Transmission Electron ◽  
Wide Range ◽  
Poly Acrylic Acid

Carbon nanotube (CNT) polymer composites were synthesized via in situ nitroxide-mediated diblock copolymerization. Poly(acrylic acid) (PAA) was chosen as a first block to obtain a precomposite CNT-PAA which is readily dispersible in various solvents including water. The immobilization of the stable poly(acrylic acid) alkoxyamine functionality on the nanotube surface occurs during the synthesis of the first block without CNT prior treatment. The living character of this block is established by spectroscopic methods and the nature of the CNT/PAA interaction is discussed. This living first block offers the opportunity to reinitiate the polymerization of a second block that can be chosen among a wide range of monomers. This versatility is illustrated with a second block containing methyl acrylate (MA) or styrene (S). Scanning and transmission electron microscopies confirm good CNT dispersion in the polymer network, while transmission electron microscopy also spots the anchorage locations of PAA on the CNT surface. Such nanotubes wrapped by diblock copolymers can be dispersed in various polymer matrices to create CNT—polymer composites. Conductivity measurements show that these composites obey a percolation-like power law with a low percolation threshold (less than 0.5 vol%) and a high maximum conductivity (up to 1.5 S/cm at room temperature).

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