46results about How to "Increase potential value" patented technology

The invention provides an ion concentration polarization chip based on a graphene porous membrane and a preparation method of the ion concentration polarization chip and relates to ion concentration polarization chips. The ion concentration polarization chip comprises a glass base, PDMS substrates, a buffer solution water inlet / outlet and a graphene-based porous membrane in a first PDMS substrate, wherein the first PDMS substrate is provided with a Y-shaped groove, and a second PDMS substrate is provided with an I-shaped groove. The preparation method comprises the following steps: preparing graphene-based precursor slurry; producing a chip; and smearing a notch of a Y channel with the graphene-based precursor slurry, and curing, so as to obtain the ion concentration polarization chip. The preparation method has the beneficial effects that the process is simple, and the chip is low in cost and easy to prepare; graphene materials are weakly acidic and have low damage to devices; and the conductivity of the graphene materials is conveniently regulated and controlled, surface functional groups and electric charges are easily regulated and controlled, and the graphene materials can be composited with a large number of materials so as to prepare composite films and devices. Compared with a NaFion-base chip, a relatively stable and relatively large-range exhaustion region can be formed by the graphene-based chip.

The invention relates to acrylic resin containing amphiphilic lateral chains, a preparation method thereof and application of the acrylic resin containing the amphiphilic lateral chains. The general structural formula of the acrylic resin containing the amphiphilic lateral chains is as shown in a figure 1. The preparation method comprises the following steps: (1) dichloromethane, tetraethylene glycol and triethylamine are added, acryloyl chloride is slowly dripped into the mixture under the protection of nitrogen, and the mixture is subjected to temperature rise and stirring; (2) ester obtained in the step (1) is dissolved in anhydrous dichloromethane, dipped with acyl fluoride containing perfluor polyether chains, and stirred at a temperature of 80 DEG C below zero and 25 DEG C; and (3) 100 to 150 millimeters of tetrahydrofuran and 800 to 900 milligrams of initiator are added, and the mixture is subjected to temperature rise to between 60 and 80 DEG C, added with 15 to 20 grams of methacrylic ester, 12 to 15 grams of glycidyl methacrylate and 15 to 25 grams of acrylic acid derivatives under the protection of the nitrogen, stirred, subjected to temperature rise to between 65 and 80 DEG C, maintained at a constant temperature for 48 to 72 hours to obtain the acrylic resin containing the amphiphilic lateral chains. The resin not only can be taken as a film former of marine antifouling coating but also has nontoxic and eco-friendly performance.

The invention discloses a formula of an antiseptic and antistaling agent complex containing butyl ferulate, which comprises 1-2 parts of butyl ferulate, 1-2 parts of silver carp fish scale collagen peptide, and 1-2 parts of disodium EDTA , 0.5-1 part of jasmine flower extract, 4-5 parts of pullulan. It also discloses the application of the antiseptic preservative composition formula in food processing, especially the application in salmon antiseptic preservation, which effectively solves the difficulties of easy corruption, taste change, discoloration and water loss of salmon, and after treatment The best salmon has bright color, clear texture, elastic muscles and firm meat for a long time. The application and transportation of the solid preservative developed by the invention are more convenient, the produced salmon has a long storage period and high safety, and meets market demands.

The invention provides a production method of an enzyme-free superoxide anion electrochemical sensor. The production method comprises the following steps: functionalizing multi-walled carbon nano-tubes with L-cysteine to obtain Cys-MWCNTs, and depositing silver nano-particles on the surface of a Cys-MWCNTs modified electrode through an electrochemical technology to obtain the enzyme-free superoxide anion electrochemical sensor. The invention also provides the enzyme-free superoxide anion electrochemical sensor produced through the method, and an application of the enzyme-free superoxide anion electrochemical sensor. The catalysis effect of the silver nano-particles on active oxygen is used to substitute SOD enzyme for the first time in order to detect superoxide anions. The method has the advantages of simplicity, easiness in operation, difficult inactivation and realization of long-term preservation and use. The modified electrode is successfully applied to detection of the superoxide anions released by living cells (PC12). The modified electrode constructed in the invention has the characteristics of very good electrochemical response to O<2>.<->, wide linear range, high sensitivity, short response time, good stability and good repeatability.