3results about How to "Modification method is simple" patented technology

The present application relates to a kind of anticoagulation, anti-oxidative stress hemodialysis apparatus and preparation method, belong to biomedical polymer and hemodialysis field.Oxygen-containing functional group carbon dots, anticoagulation monomer, initiator and crosslinking agent are added into water, to obtain modified liquid of anticoagulation and anti-oxidation;Protective gas is introduced into hemodialysis apparatus to remove oxygen, then modified liquid is introduced into dialysis apparatus, then sealing heating is carried out to initiate anticoagulation monomer in situ polymerization on the surface of dialysis membrane, and the oxygen-containing functional group carbon dots form gel microspheres under the wrapping of polymer, i.e., anticoagulation, anti-oxidative stress hemodialysis apparatus is obtained.The APTT of modified dialysis apparatus can reach 600s, and the removal rate of DPPH and ABTS free radicals is 71.25% and 97.47% respectively.The present application only needs to carry out one-step surface modification to dialysis apparatus finished product, which can give hemodialysis apparatus the dual functions of anticoagulation and anti-oxidative stress, is simple and convenient, and has good application prospect.

The invention discloses a covalent modification method of a high-performance lignin-based electrode material, and belongs to the technical field of biomass-based supercapacitors. The method specifically comprises the following steps: dissolving sulfate lignin in DMF (Dimethyl Formamide), adding a bifunctional reagent, and stirring for reaction; and after the reaction is finished, pouring the reaction liquid into deionized water in which hydrochloric acid is dropwise added, and carrying out anti-precipitation, filtration, drying, heat treatment, activation and other processes to obtain the covalent modified lignin. The modified lignin, a conductive agent and a binder are ground and mixed, a current collector is coated with the mixture and dried, and the lignin-based electrode is obtained. The covalent modification degree of the lignin is regulated and controlled by controlling the adding amount of the bifunctional reagent, modified lignin with different thermodynamic properties is obtained, and the purpose of regulating and controlling lignin derived carbon structure defects is achieved. The preparation method is controllable in scale and simple to operate, the obtained electrode material is few in defect structure and excellent in electrochemical performance, and a new theory and a new method are provided for development of the lignin-based electrode material.

An alkali metal-modified titanium-silicon molecular sieve, characterized in that the molecular sieve contains titanium, silicon, oxygen, and alkali metal elements, and is characterized by Raman spectroscopy using a 325 nm light source, showing a value at 990±20 cm⁻¹. ‑1 A titanium species signal peak exists within the range, at 1125±20 cm⁻¹. ‑1 No obvious titanium species signal peak was observed within the range of 800±20 cm⁻¹. ‑1 A molecular sieve framework structure signal peak exists within the range, calculated with peak area as intensity, 990±20 cm⁻¹. ‑1 Signal peak intensity and 800±20cm ‑1 The ratio of signal peak intensity I(990) / I(800) is (0.2-2):1.