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This calcium carbonate material is prepared under environmentally friendly conditions.
It recombines calcite crystals from the state of natural biopolymers (such as shells) into a sponge-like flexible absorbable material
.
According to the researchers of this project from Canada, with the prosperity of the aquaculture industry, shells have become a viable source of renewable calcium carbonate, which is becoming more and more important for the development and utilization of this biological mineral waste
.
The usual practice is to use these shells as ore crushed and used as raw materials such as architectural coatings.
However, in this study, the researchers heated the waste mussel shells and treated them with acid at room temperature
.
This will cause the crystals in the shell to break and then reassemble into clumps under gentle stirring.
Unlike the highly ordered calcite in shells, soft calcite (SC) has a nested morphology
.
This soft calcite material has different and different forms, opening many doors for materials science, creating new materials with different properties from those using calcite mined from the earth's crust
.
A brief description of the specific steps is: first preheat the shell to remove organic matter, and at the same time facilitate the separation of the inner pearl aragonite layer from the outer calcite layer; use mechanical means to separate the outer shell and then perform two acid treatments on the outer shell to obtain the shell and calcium acetate Mixture with SC; the difference in buoyancy between SC and the remaining shell makes their separation simple, and the final product can be obtained by washing the SC after removing the calcium acetate solution
.
? Regarding this soft calcite, the most impressive thing is its adsorption capacity
.
Experiments show that the absorption capacity of SC for crude oil is 977%±84%, and it shows good recoverability in 10 times of repeated use
.
In contrast, the disadvantage of calcium carbonate powder material is that it is difficult to form agglomerates, so it is difficult to form and apply
.
? At present, researchers are studying the expansion of SC production scale and how to increase the size of SC agglomerates in oil absorption experiments to prevent their losses in the recycling process
.
In addition, the researchers expect that because of the biocompatibility of calcite, SC will have value in biomedical applications and the preparation of new composite materials
.
It recombines calcite crystals from the state of natural biopolymers (such as shells) into a sponge-like flexible absorbable material
.
According to the researchers of this project from Canada, with the prosperity of the aquaculture industry, shells have become a viable source of renewable calcium carbonate, which is becoming more and more important for the development and utilization of this biological mineral waste
.
The usual practice is to use these shells as ore crushed and used as raw materials such as architectural coatings.
However, in this study, the researchers heated the waste mussel shells and treated them with acid at room temperature
.
This will cause the crystals in the shell to break and then reassemble into clumps under gentle stirring.
Unlike the highly ordered calcite in shells, soft calcite (SC) has a nested morphology
.
This soft calcite material has different and different forms, opening many doors for materials science, creating new materials with different properties from those using calcite mined from the earth's crust
.
A brief description of the specific steps is: first preheat the shell to remove organic matter, and at the same time facilitate the separation of the inner pearl aragonite layer from the outer calcite layer; use mechanical means to separate the outer shell and then perform two acid treatments on the outer shell to obtain the shell and calcium acetate Mixture with SC; the difference in buoyancy between SC and the remaining shell makes their separation simple, and the final product can be obtained by washing the SC after removing the calcium acetate solution
.
? Regarding this soft calcite, the most impressive thing is its adsorption capacity
.
Experiments show that the absorption capacity of SC for crude oil is 977%±84%, and it shows good recoverability in 10 times of repeated use
.
In contrast, the disadvantage of calcium carbonate powder material is that it is difficult to form agglomerates, so it is difficult to form and apply
.
? At present, researchers are studying the expansion of SC production scale and how to increase the size of SC agglomerates in oil absorption experiments to prevent their losses in the recycling process
.
In addition, the researchers expect that because of the biocompatibility of calcite, SC will have value in biomedical applications and the preparation of new composite materials
.
