Carbon paste for electrochemical detection test strip and preparation method thereof, and electrochemical detection test strip and preparation method thereof
A detection test paper, electrochemical technology, applied in the field of biosensors, can solve the problems of low sensitivity, poor wettability between electrodes and enzyme solution, poor sensor reproducibility, etc., to achieve the effect of improving sensitivity, improving reproducibility, and improving conductivity
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[0047]The present invention also provides a kind of preparation method of carbon slurry for above-mentioned electrochemical detection test strip, comprising the following steps:
[0048] The graphite, the conductive carbon black, the polyester resin, the surfactant and the solvent are mixed, stirred and ground to obtain the carbon slurry for the electrochemical detection test strip.
[0049] The present invention does not have special limitation to the method for described mixing and stirring, preferably carries out mixing and stirring according to the following method:
[0050] mixing and heating the polyester resin with a solvent to obtain a polyester resin solution;
[0051] Mixing a surfactant with a solvent to obtain a surfactant solution;
[0052] Mix the polyester resin solution with the surfactant solution, add graphite and conductive carbon black, and stir.
[0053] Wherein, the polyester resin is mixed with a solvent and heated, wherein the heating temperature is p...
Embodiment 1
[0078] 1. In a three-necked flask, add ethylene glycol butyl ether acetate and polyester resin in the following proportions, heat to 80°C, stir and mix thoroughly to obtain a mixed solution in which the resin is completely dissolved, and transfer it to a container to cool for later use;
[0079] Ethylene glycol butyl ether acetate 70wt%;
[0080] Polyester resin 30wt%.
[0081] 2. Add a fixed proportion of surfactant and butyl glycol ether acetate in the stainless steel tank according to the table, stir and disperse evenly, and let it stand for use;
[0082] 3. Add the resin mixture prepared in step 1 to the mixture prepared in step 2 according to the ratio in the table below, and at the same time add a fixed proportion of carbon black and graphite according to the table, stir and disperse at high speed for 3 hours, transfer to the grinder and grind for 2 Finally, the carbon paste for electrochemical detection test strips was prepared.
[0083] components
[0084] ...
Embodiment 2
[0098] 1. In a three-necked flask, add ethylene glycol butyl ether acetate and polyester resin in the following proportions, heat to 80°C, stir and mix thoroughly to obtain a mixed solution in which the resin is completely dissolved, and transfer it to a container to cool for later use;
[0099] Ethylene glycol butyl ether acetate 60wt%;
[0100] Polyester resin 40wt%.
[0101]2. Add a fixed ratio of surfactant and ethylene glycol butyl ether acetate into the stainless steel iron tank according to the table, stir and disperse evenly, and let it stand for use.
[0102] 3. Add the resin mixture prepared in step 1 to the mixture prepared in step 2 according to the ratio in the table below, and at the same time add a fixed proportion of carbon black and graphite according to the table, stir and disperse at high speed for 3 hours, transfer to the grinder and grind for 2 Finally, the carbon paste for electrochemical detection test strips was prepared.
[0103]
[0104] 4. Coati...
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