Spatiotemporal control of calcium carbonate nucleation using mechanical deformations of elastic surfaces

Soft Matter ◽  
2020 ◽  
Vol 16 (26) ◽  
pp. 6038-6043
Author(s):  
Jay M. Taylor ◽  
Abhiteja Konda ◽  
Stephen A. Morin
Keyword(s):  
Calcium Carbonate ◽  
Functional Groups ◽  
Interfacial Energy ◽  
Crystal Nucleation ◽  
Chemically Modified ◽  
Mechanical Deformations ◽  
Spatiotemporal Control ◽  
Elastic Surfaces

We demonstrate that chemically modified elastic surfaces can be used to control crystal nucleation. By stretching the elastomer, we redistribute functional groups to tune interfacial energy and accelerate crystal nucleation.

Solvent Extraction of Some Metal Ions with Lipophilic Chitosan Chemically Modified with Functional Groups of Dithiocarbamate

2001 ◽  
Vol 30 (7) ◽  
pp. 698-699 ◽  
Author(s):  
Katsutoshi Inoue ◽  
Kazuharu Yoshizuka ◽  
Keisuke Ohto ◽  
Hirofumi Nakagawa
Keyword(s):  
Solvent Extraction ◽  
Metal Ions ◽  
Functional Groups ◽  
Chemically Modified

Adsorption Behavior of Waste Paper Gels Chemically Modified with Functional Groups of Primary Amine and Ethylenediamine for Some Metal Ions

2007 ◽  
Vol 25 (6) ◽  
pp. 845-855 ◽  
Author(s):  
Hidetaka Kawakita ◽  
Katsutoshi Inoue ◽  
Keisuke Ohto ◽  
Satomi Shimada ◽  
Kyoko Itayama
Keyword(s):  
Metal Ions ◽  
Functional Groups ◽  
Primary Amine ◽  
Adsorption Behavior ◽  
Waste Paper ◽  
Chemically Modified

Chemically modified surface functional groups of Alcaligenes sp. S-XJ-1 to enhance its demulsifying capability

2017 ◽  
Vol 101 (9) ◽  
pp. 3839-3848
Author(s):  
Yuyan Zhang ◽  
Jia Liu ◽  
Xiangfeng Huang ◽  
Lijun Lu ◽  
Kaiming Peng
Keyword(s):  
Functional Groups ◽  
Surface Functional Groups ◽  
Chemically Modified ◽  
Modified Surface

Ab initio and metadynamics studies on the role of essential functional groups in biomineralization of calcium carbonate and environmental situations

2014 ◽  
Vol 16 (48) ◽  
pp. 26843-26854 ◽  
Author(s):  
Moumita Saharay ◽  
R. James Kirkpatrick
Keyword(s):  
Calcium Carbonate ◽  
Ab Initio ◽  
Functional Groups ◽  
Computational Study ◽  
Ion Association ◽  
Bulk Water ◽  
Molecular Clusters ◽  
Vibrational Frequencies

A computational study of the interaction of Ca2+ and CO32− with functional groups relevant to CaCO3 biomineralization and NOM to evaluate the structural environments, energetics of these interactions in small molecular clusters, changes in the vibrational frequencies due to ion-association, and the effects of solvation of the clusters in bulk water.

Biomimetic Synthesis of Prismatic Calcite Mesocrystals in the Presence of Nonionic Copolymer

2012 ◽  
Vol 535-537 ◽  
pp. 1512-1515
Author(s):  
Yi Ping Wu ◽  
Xiao Hong Wang ◽  
Qun Zhang
Keyword(s):  
Calcium Carbonate ◽  
Functional Groups ◽  
Triblock Copolymer ◽  
Biomimetic Synthesis ◽  
Synthesis Process ◽  
Synthetic Strategy ◽  
Oxygen Functional Groups ◽  
Special Morphology ◽  
Ether Oxygen ◽  
Oxygen Groups

A triblock copolymer of F127 was used as a model additive to influence the growth of calcium carbonate (CaCO3) in a biomimetic synthesis process. The results demonstrate that F127 preferentially interacted with selected faces of calcite and induces the growth along the crystallographic c direction into prisms with mesocrystal architectures. Although only containing ether-oxygen functional groups, F127 is considered as an analogue to an array of polyanions contributing to the special morphogenesis of CaCO3. Consequently, this result provides a wider sense in the significance of the ether-oxygen groups into biomineralization mechanism and an alternative synthetic strategy for special morphology of CaCO3 materials.

Effects of functional groups and soluble matrices in fish otolith on calcium carbonate mineralization

2010 ◽  
Vol 5 (5) ◽  
pp. 055009 ◽  
Author(s):  
Dongni Ren ◽  
Zhuo Li ◽  
Yonghua Gao ◽  
Qingling Feng
Keyword(s):  
Calcium Carbonate ◽  
Functional Groups ◽  
Fish Otolith

scholarly journals Mapping Organic Functional Groups at Nanosurfaces Using Colloidal Gold Conjugation

2021 ◽  
Author(s):  
Nicolas Debons ◽  
Dounia Dems ◽  
Thibaud Coradin ◽  
Carole Aimé
Keyword(s):  
Spatial Distribution ◽  
Functional Groups ◽  
Silica Particle ◽  
Chemical Nature ◽  
Particle Surface ◽  
Complete Understanding ◽  
Gold Colloids ◽  
Chemically Modified ◽  
Organic Functional Groups ◽  
Amine Groups

The functionalization of nanomaterials surface is key to improve their stability, reactivity and confer specific properties. However, mapping functional groups at the nanoscale remains difficult, <i>i.e.</i> identifying chemical nature but also spatial distribution. It is particularly challenging for organic groups and non-planar objects such as nanoparticles. Here we report a strategy for mapping amine groups on the surface of silica particles using chemically-modified gold colloids, which are used as tags to specifically and spatially identify these organic groups under electron microscopy. A complete understanding of the correlation between spatial distribution of gold colloids and chemical state of the silica particle surface (by XPS) is presented. The range of reliability of this strategy for mapping organic groups at nanointerfaces is assessed and its implications for biofunctional nanoobjects where interdistance of biomolecules are of paramount importance are discussed.

Механизмдействияингибиторовприобразованииосадкакарбонатакальциявобратноосмотическихаппаратах

2019 ◽  
pp. 10-22
Author(s):  
A. Pervov ◽  
A. Andrianov
Keyword(s):  
Calcium Carbonate ◽  
Reverse Osmosis ◽  
Experimental Technique ◽  
Crystallization Process ◽  
Crystal Surface ◽  
Membrane Surface ◽  
Crystal Nucleation ◽  
Phase Crystal ◽  
Crystalline Growth

Знание механизма образования осадков малорастворимых солей на обратноосмотических мембранах чрезвычайно важно при выборе мероприятий по их предотвращению и сокращению расхода концентрата. Проведенные исследования позволили сформулировать новый взгляд на механизм образования кристаллических отложений и роль ингибиторов в предотвращении этого процесса. В основе разработки экспериментальной методики лежит представление о том, что первая фаза кристаллизации зародышеобразование является гомогенной, т. е. происходит в застойных зонах в объеме концентрата при высоких значениях пересыщения по карбонату кальция. После образования кристаллы выносятся из застойных зон и осаждаются на поверхности мембраны, как и другие взвешенные частицы, содержащиеся в обрабатываемой воде. Представлены результаты изучения процесса адсорбции молекул полимерных ингибиторов на поверхности кристаллов при зародышеобразовании и кристаллическом росте на мембране. Приведены экспериментально полученные зависимости скорости адсорбции ингибиторов от их дозы, скорости образования карбоната кальция, скорости зародышеобразования от общей поверхности зародышевых кристаллов. Изучение микрофотографий показало зависимость размера и количества кристаллов от значения пересыщения в застойной зоне при зародышеобразовании, а также от эффективности ингибитора. Представлена методика, позволяющая определить концентрации растворенных солей в застойных зонах мембранного аппарата и значения пересыщения, соответствующие началу процесса кристаллизации, без добавления различных ингибиторов и с их использованием.Knowledge of the mechanism of precipitation of slightlysoluble salts on reverse osmosis membranes is extremely important while choosing measures to prevent it and reduce the consumption of concentrate. The conducted studies provided for enunciating a fresh approach to the mechanism of crystalline deposit formation and the role of inhibitors in preventing this process. The development of the experimental technique is based on the idea that the first crystallization phase crystal nucleation is homogeneous, that is, occurs in stagnant zones in the concentrate volume at high oversaturation with calcium carbonate. Upon the formation the crystals are removed from the stagnant zones and settled on the membrane surface like other suspended particles present in the treated water. The results of studying the adsorption of polymer inhibitor molecules on the crystal surface during nucleation and crystalline growth on the membrane are presented. The experimentally obtained dependences of the rate of adsorption of inhibitors on the dose of inhibitors, the rate of formation of calcium carbonate, the rate of nucleation, and on the total surface of the germinal crystals are given. The study of micrographs of crystals showed the dependence of the size and number of crystals on the oversaturation value in the stagnant zone during nucleation as well as on the effectiveness of the inhibitor. A method is presented that allows determining the concentration of dissolved salts in the stagnant zones of the membrane apparatus and the oversaturation values corresponding to the onset of the crystallization process eliminating the addition and use of various inhibitors.

Simulating the binding of organic functional groups to aqueous calcium carbonate species

2021 ◽  
Author(s):  
Alicia Schuitemaker ◽  
Julie Aufort ◽  
Katarzyna B Koziara ◽  
Raffaella Demichelis ◽  
Paolo Raiteri ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Functional Groups ◽  
Organic Molecules ◽  
Organic Functional Groups ◽  
Minerals Processing ◽  
Carbonate Species

The interaction of organic molecules with mineral systems is relevant to a wide variety of scientific problems both in the environment and minerals processing. In this study, the coordination of...

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