46results about How to "Efficient synthesis process" patented technology

The invention discloses a preparation method of fullerol. The preparation method comprises the following steps: (1) dissolving fullerene in an organic solvent, wherein the organic solvent is selected from an organic matter which is higher than water in relative density, immiscible with water and can dissolve fullerene; then, respectively putting fullerene C2n which is dissolved in the organic solvent, a hydroxylation reagent aqueous solution with appointed concentration and a phase transfer catalyst into a reactor and layering, wherein a water phase is in the upper layer while the organic solvent in the lower layer; (2) opening a reaction system without isolating air, and after continuously stirring for 10-72 hours at room temperature, stopping reaction; (3) separating liquids, after washing the organic solvent with water, recovering for later use, and recovering the solvent from the water phase to obtain a cured fullerol coarse product; and (4) refining the fullerol coarse product to obtain solid pure fullerol. The synthetic process disclosed by the invention is simple, efficient, convenient to operate and easy for scaled production, and the prepared fullerol shows a good electron paramagnetic spinning property.

The invention belongs to the technical field of polymer materials, in particular to a dynamic covalent cross-linking material for enhancing the performance of polyethylene, a preparation method and application thereof. The dynamic covalent cross-linking material of the present invention is made of linear polyethylene with borate ester groups and boron obtained through dehydration condensation reaction of polyboric acid molecules and 1,2-diol molecules or 1,3-diol molecules The ester cross-linking agent is prepared by boron ester exchange reaction; the dynamic covalent cross-linked polyethylene material can realize the transformation and reorganization of the polymer network through the reversible exchange reaction between different borate ester groups. Add the dynamically covalently cross-linked polyethylene to commercial thermoplastic polyethylene to synthesize a polyethylene / dynamically cross-linked polyethylene composite polymer material; the mechanical properties of the composite polymer material (such as tensile strength, Young's modulus ), creep resistance, solvent resistance, heat resistance and other properties are significantly enhanced, and can be used for repeated processing, repeated shaping, and 3D printing.