Surface-carboxylated fluorescent microspheres in crosslinked shell structure and preparation method thereof
A technology of fluorescent microspheres and cross-linked microspheres, applied in the field of fluorescent sensing materials, can solve the problems of limited application, instability, falling off, etc., and achieve the effects of convenient operation, stable structure and good dispersion performance.
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[0019] This embodiment provides a polymer fluorescent microsphere with carboxyl groups on the surface and cross-linked by diazo resin. The preparation steps are as follows:
[0020] 1. Preparation of poly(p-phenylenevinylene) precursor salt solution
[0021] Referring to the literature Macromol. Rapid Commun. 2013, 34, 102-108, the synthesis of poly-p-phenylene vinylene precursor: the p-phenylene vinylene monomer was catalyzed in an oxygen-free environment and sodium hydroxide aqueous solution, and ice-water bath After reacting in the medium for one hour, dialyze with deionized water 5 to 6 times to obtain the aqueous solution of the poly(p-phenylenevinylene) precursor. Use a pipette gun to measure 2.5 mL of the aqueous solution of the poly(p-phenylenevinylene) precursor. Add 0.02925g of sodium chloride therein, shake and dissolve to obtain a colorless and transparent poly(p-phenylenevinylene) precursor salt solution.
[0022] 2. Preparation of diazo resin aqueous solution ...
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