Bioinspired enhancement of chitosan nanocomposite films via Mg-ACC crystallization, their robust, hydrophobic and biocompatible

Cai

Front. Bioeng. Biotechnol.

et al. 2021

A too slow degradation of iron (Fe) limits its orthopedic application. In this study, calcium chloride (CaCl2) was incorporated into a Fe-based biocomposite fabricated by laser additive manufacturing, with an aim to accelerate the degradation. It was found that CaCl2 with strong water absorptivity improved the hydrophilicity of the Fe matrix and thereby promoted the invasion of corrosive solution. On the other hand, CaCl2 could rapidly dissolve once contacting the solution and release massive chloride ion. Interestingly, the local high concentration of chloride ion effectively destroyed the corrosion product layer due to its strong erosion ability. As a result, the corrosion product layer covered on the Fe/CaCl2 matrix exhibited an extremely porous structure, thus exhibiting a significantly reduced corrosion resistance. Besides, in vivo cell testing proved that the Fe/CaCl2 biocomposite also showed favorable cytocompatibility.

Section: Resultsmentioning

confidence: 99%

Laser Additively Manufactured Iron-Based Biocomposite: Microstructure, Degradation, and In Vitro Cell Behavior

Cai

Front. Bioeng. Biotechnol.

et al. 2021

Crystal Research and Technology

“…Researchers' inspiration for biomineralization comes from the pearl layer, where they found that biominerals with well-defined layered structure are made up of 95 wt% CaCO 3 and 5 wt% organic compounds. [1][2][3] In the process of biomineralization, the interaction between a series of biological macromolecules (such as proteins, [4,5] chitins, [6] polysaccharides, [7][8][9] and inorganic substances promote the deposition of inorganic crystals in organisms and further form organic-inorganic composite materials, it DOI: 10.1002/crat.202100012 also allows organisms to possess complex properties and polytropic forms. [10] CaCO 3 is a kind of sparingly soluble salt, which is utilized by nature to fabricate exceptionally stable and tough materials.…”

Section: Introductionmentioning

confidence: 99%

Amylopectin Regulated Mineralization of Calcium Carbonate and Its Application in Removing of Pb(II)

Zhao

Zhou

Du³

et al. 2021

As an ecological and environment-friendly building material, sticky rice mortar has attracted the attention of many researchers. Amylopectin is the most important organic matter of it, which can improve the mechanical properties and durability of sticky rice mortar by inducing mineralization of calcium carbonate ( CaCO3 ). However, amylopectin induced formation of CaCO 3 has not been reported. In this paper, mineralization of CaCO 3 induced by gelatinized amylopectin is investigated. For comparison, the different morphologies of CaCO 3 are studied in the presence of Mg 2+ , Fe 3+ . Moreover, these CaCO 3 products with different morphologies are used to clean the waste water. The results indicate that gelatinized amylopectin is conducive to formation of pumpkin-like vaterite. It forms uniform rod and dumbbell-shaped calcite in the presence of Mg 2+ , form calcite with stepped depressions in the presence of Fe 3+ . The adsorption of Pb(II) can reach extremely high level (1445.86 mg g −1 ) with the rod-like calcite.

“…Biomineralization refers to the process that an organism constructs a hierarchical structure based on inorganic minerals under certain environmental conditions [1,2,3,4,5]. This process is highly regulated by the biological environments that guide mineral nucleation and growth, including solution states, biomacromolecules, and substrates [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Nano-Montmorillonite Regulated Crystallization of Hierarchical Strontium Carbonate in a Microbial Mineralization System

et al. 2019

Self Cite

In this paper, nano-montmorillonite (nano-MMT) was introduced into the microbial mineralization system of strontium carbonate (SrCO3). By changing the nano-MMT concentration and the mineralization time, the mechanism of mineralization was studied. SrCO3 superstructures with complex forms were acquired in the presence of nano-MMT as a crystal growth regulator. At low concentrations of nano-MMT, a cross-shaped SrCO3 superstructure was obtained. As the concentration increased, flower-like SrCO3 crystals formed via the dissolution and recrystallization processes. An emerging self-assembly process and crystal polymerization mechanism have been proposed by forming complex flower-like SrCO3 superstructures in high concentrations of nano-MMT. The above research indicated that unique bionic synthesis strategies in microbial systems could not only provide a useful route for the production of inorganic or inorganic/organic composites with a novel morphology and unique structure but also provide new ideas for the treatment of radionuclides.