Preparation method of calcium alginate electrically-driven film adopting microwave vacuum low-temperature drying technology

Abstract

The invention provides a preparation method of a calcium alginate electrically-driven film adopting a microwave vacuum low-temperature drying technology. The microwave vacuum low-temperature drying technology is adopted, and through the combination with the two technologies of microwave drying and vacuum drying, the advantages of the two technologies are sufficiently and comprehensively developed.The preparation method comprises the following steps: using natural macromolecular biological materials of sodium alga acid as a film forming main material and a cross-linking agent CaCl2, and addingplasticizer glycerinum and plastic assisting agent lauryl sodium sulfate so as to prepare the calcium alginate electrically-driven film of a three-dimensional network gel structure. The raw materialsare wide in sources and low in cost, and the obtained electrically-driven film is non-toxic, tasteless and biodegradable. After microwave vacuum drying, hierarchical pore structures are connected with one another and are regular, the ionic cross-linking of Ca<2+> on the inner layer and the outer layer is comprehensive and uniform, and the electrically-driven film is excellent and controllable inelectrically-driven performance and long in service life. The microwave vacuum low-temperature drying technology of the calcium alginate electrically-driven film prepared in the invention is energy-saving, efficient and free of pollution, and is mostly beneficial for high molecular material synthesis and curing reaction with extremely high requirement for heating rate and uniformity.

Description

technical field [0001] The invention relates to a preparation process of a calcium alginate electro-actuation membrane, in particular to a preparation method of a calcium alginate electro-actuation membrane using microwave vacuum low-temperature drying technology. Background technique [0002] When the external conditions change (such as ambient temperature, humidity, light conditions and pH value, etc.) Sensitive response, so it has broad application prospects in the fields of bionic engineering, micromechanics and biomedical science. However, the materials currently used for smart gels are mainly artificially synthesized polymers, and there are relatively few researches on natural polymer materials. Compared with artificially synthesized polymers, many natural polymer materials have the advantages of good biocompatibility, strong hydrophilicity and biodegradability; the research on their stimuli-responsive properties can not only break through their traditional applicatio...

AI Technical Summary

Problems solved by technology

However, this method needs to be used in conjunction with a 3D printing system with a complex structure and a high-precision DC stabilized power supply, which leads to high cost, difficult operation, cumbersome post-processing and easy clogging of the printing nozzle.

Due to CaCO 3 Solution releases Ca 2+ The low ion concentration makes the mechanical strength of calcium alginate hydrogel poor, and it is not suitable for electro-actuated membranes of bionic artificial muscles

In addition, the general domestic and foreign use of CaCl 2 The technical methods of preparing calcium alginate electro-actuated membranes from solutions (such as dry film immersion method, direct mixing method, etc.) all have local excessive cross-linking that makes the electro-actuated membrane stiff, or uneven cross-linking and mixing that lead to its electrical actuation. Problems such as degraded actuation performance and instability

[0004] This is the case for all the research on the preparation of calcium alginate electro-actuated membranes at present, but the preparation method using microwave vacuum low-temperature drying technology is relatively innovative, and no related work reports have been seen so far.

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