Polymorphic Crystallization and Diversified Growth of CaCO₃ in HPAM‐HABS‐Na₂SiO₃ Hybrid Solutions

Abstract

CaCO3 crystallization is a controversial topic hampered in part by the lack of empirical evidence of the growth of polymorphic crystals. In this work, great effort has been made to investigate the polymorphic crystal growth mechanism and the diversified morphologies, including peanut, shuttle, worm‐like and irregular cubic CaCO3 that occur in hydrolysed polyacrylamide (HPAM) ‐ heavy alkylbenzene sulfonate (HABS) ‐ Na2SiO3 hybrid system. It is verified that silica has an inhibition effect during the phase‐transformation of CaCO3. With the addition of HPAM, a new morphology of CaCO3 composited with CaCO3 fibres was received in the HPAM‐Na2SiO3 mixed solution. In the ternary additive system, the template effect of HPAM is undermined by HABS, and HPAM forms a new polymer‐surfactant complex conformation. Meanwhile, the inhibition effect of silica is weakened with the increase of organics.

Calcium carbonate: controlled synthesis, surface functionalization, and nanostructured materials

“…Calcium carbonate (CaCO 3 ) ubiquitously exists in sedimentary rocks and minerals in the form of marble, limestone, and chalk, and can also be found in marine sediments. 1,2 In addition, CaCO 3 is present in many living organisms, functioning either as a structural support (e.g., in algae, 3 sponges, 4,5 corals 6 ), a form of protection (e.g., shells), 7 a hard buoyancy tank (e.g., cuttlebone), 8 or as a component in photoreceptor systems (e.g., light-focusing eye lenses of chitons and brittlestars). 9 CaCO 3 is also synthesized by bacteria, 10 even in extreme biomineralization conditions, 11 and is an essential component of mineralized tissues as in the apatitic whale bone.…”

“…Calcium carbonate (CaCO 3 ) ubiquitously exists in sedimentary rocks and minerals in the form of marble, limestone, and chalk, and can also be found in marine sediments. 1,2 In addition, CaCO 3 is present in many living organisms, functioning either as a structural support ( e.g. , in algae, 3 sponges, 4,5 corals 6 ), a form of protection ( e.g.…”

Fabrication of Ag-CaCO3 Nanocomposites for SERS Detection of Forchlorfenuron

“…Calcium carbonate (CaCO 3 ) is a crucial inorganic non-metallic substance widely present in nature, such as in marble, limestone, calcite, and Cretaceous deposits [1,2]. Owing to its abundant sources, economical nature, high degree of whiteness, as well as its non-toxic and tasteless properties, CaCO 3 has found extensive utilization across diverse industries, encompassing daily chemical products, food, medicine, papermaking, rubber, and plastics [3][4][5].…”

HABS‐Silicate Controlled Synthesis of Worm‐Like Calcite via Orientated Attachment

“…Significantly, calcite crystals with unconventional morphologies such as star-, peanut-, labyrinth-and spindle-like, have been found during the crude oil migration in the oilfield, which may have experienced a process of remineralization. [8,[21][22][23][24] Moreover, a large amount of worm-like calcites co-exists with silica in the oilfield. Up to now, there is no research about the origin of this non-natural worm-like calcite.…”