scholarly journals The Combined Effects of Sr(II) and Poly(Acrylic Acid) on the Morphology of Calcite

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3339 ◽  
Author(s):  
Hak Yeong Kim ◽  
Taewook Yang ◽  
Wansoo Huh ◽  
Young-Je Kwark ◽  
Yunsang Lee ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Acrylic Acid ◽  
Combined Effects ◽  
Magnesium Ions ◽  
Ethylene Imine ◽  
Strontium Ions ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

Biomineralization of calcium carbonate has interesting characteristics of intricate morphology formation with controlled crystal polymorphs. In particular, modification of calcite morphology with diverse additives has been the focus of many biomimetic and bioinspired studies. The possible role of strontium ions in enhancing the morphology-modifying ability of macromolecules was investigated. In the present study, concentrations of strontium ions were comparable to that in seawater, and anionic poly(acrylic acid) and cationic poly(ethylene imine) were used as model macromolecules. When strontium ions were combined with anionic poly(acrylic acid), new types of calcite surfaces, most likely {hk0}, appeared to drastically change the morphology of the crystals, which was not observed with cationic poly(ethylene imine). This behavior of strontium ions was quite similar to that of magnesium ions, which is intriguing because both ions are available from seawater to be utilized during biomineralization.

scholarly journals Molecular Dynamics Simulation to Understand the Ability of Anionic Polymers to Alter the Morphology of Calcite

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Insil Choi ◽  
Il Won Kim
Keyword(s):  
Molecular Dynamics ◽  
Acrylic Acid ◽  
Methacrylic Acid ◽  
Dynamics Simulation ◽  
Magnesium Ions ◽  
Ethylene Imine ◽  
Anionic Polymers ◽  
Binding Behavior ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

Molecular dynamics was utilized to investigate the ability of anionic macromolecules to drastically change the morphology of calcite in the presence of magnesium ions. Anionic poly(acrylic acid) and poly(methacrylic acid) were compared with cationic poly(ethylene imine) in their binding behavior on calcite (104) and (110) surfaces. Poly(acrylic acid) and poly(methacrylic acid) showed preferential binding on (110) with strong electrostatic attractions, whereas poly(ethylene imine) was only weakly attracted to (104). The extent of the charge imbalance on the surfaces appeared responsible for the current results, which originated from the deficient number of the coordinating oxygen atoms of carbonate around the surface calcium. The results of the current study were in accordance with the previous experimental observations, where the {hk0} surfaces of calcite were elongated under the coexistence of the anionic polymers and magnesium ions. These results could be generally utilized in the polymer-controlled crystallization with broad implications in the specific interactions with crystal surfaces.

Nanosized Amorphous Calcium Carbonate Stabilized by Poly(ethylene oxide)-b-poly(acrylic acid) Block Copolymers

Langmuir ◽  
2006 ◽  
Vol 22 (4) ◽  
pp. 1875-1879 ◽  
Author(s):  
Baptiste Guillemet ◽  
Michael Faatz ◽  
Franziska Gröhn ◽  
Gerhard Wegner ◽  
Yves Gnanou
Keyword(s):  
Calcium Carbonate ◽  
Block Copolymers ◽  
Acrylic Acid ◽  
Ethylene Oxide ◽  
Amorphous Calcium Carbonate ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

Response of Swelling Behavior of Weak Branched Poly(ethylene imine)/Poly(acrylic acid) Polyelectrolyte Multilayers to Thermal Treatment

Langmuir ◽  
2016 ◽  
Vol 32 (24) ◽  
pp. 6020-6027 ◽  
Author(s):  
Yuanqing Gu ◽  
Emily K. Weinheimer ◽  
Xiang Ji ◽  
Clinton G. Wiener ◽  
Nicole S. Zacharia
Keyword(s):  
Thermal Treatment ◽  
Acrylic Acid ◽  
Swelling Behavior ◽  
Polyelectrolyte Multilayers ◽  
Ethylene Imine ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

scholarly journals Hysteretic Swelling/Deswelling of Polyelectrolyte Brushes and Bilayer Films in Response to Changes in pH and Salt Concentration

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 812
Author(s):  
Nisha Hollingsworth ◽  
Ronald G. Larson
Keyword(s):  
Acrylic Acid ◽  
Quartz Crystal Microbalance ◽  
Salt Concentration ◽  
Quartz Crystal ◽  
Ethylene Imine ◽  
Polyelectrolyte Brushes ◽  
Bilayer Films ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

Abstract We use a quartz crystal microbalance with dissipation (QCM-D) to investigate the swelling/de-swelling and hysteresis in brushes of weakly ionizable polyanion poly(acrylic acid) (PAA) brushes and bilayers containing a PAA brush and a poly(ethylene imine) (PEI) overlayer [...]

Poly(acrylic acid)/poly(ethylene glycol) adduct for attaining multifunctional cellulosic fabrics

2012 ◽  
Vol 89 (2) ◽  
pp. 648-660 ◽  
Author(s):  
N.A. Ibrahim ◽  
A. Amr ◽  
B.M. Eid ◽  
Z.E. Mohamed ◽  
H.M. Fahmy
Keyword(s):  
Acrylic Acid ◽  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Poly Acrylic Acid
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