Modification of P(NVP-DVB) and its application in the detection of BPA in aqueous solution
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School of chemistry and chemical engineering,Tianjin University of Technology

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O625.6

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    Abstract:

    To improve the accuracy of bisphenol A (BPA) detection in aqueous solution, a two-step method was used to prepare amine functionalized Poly N-vinylpyrrolidone-divinylbenzene 〔P(NVP-DVB)〕 adsorbents. The samples were characterized by SEM, FTIR, BET, TGA, and water contact angle test.in the two-step reaction and the amine functionalized N-vinylpyrrolidone-divinylbenzene was applied to the detection of BPA in aqueous solution. The optimal conditions for the chloromethylation reaction were obtained through optimization experiments: we used paraformaldehyde 〔(CH2O)n〕and hydrochloric acid as the chlorination reagents and finally synthesized intermediates 〔P(NVP-DVB-CH2Cl)〕with chlorine content up to 11.14% under the condition of n(HCl): n〔(CH2O)n〕: n(catalyst)=1:1:1, here we used ZnCl2 as the catalyst, the reaction temperature is 80℃, the chlorination time is 3 h; aniline as amination reagent was grafted to P(NVP-DVB-CH2Cl) intermediates to obtain P(NVP-DVB-aniline), the average pore size was 8.59 nm,the specific surface area was 590.36 m2/g, and the thermal weight loss rate of aniline was 81.11%. The recovery effect rate of BPA in aqueous solution was highest for the P(NVP-DVB-aniline), and the recovery rate was 99.65%, and the relative standard deviation was 1.96%, and the apply effect was better in both simulated and actual aqueous samples, and the recovery rate was nearly 20 percentage points higher than that of commercial adsorbents, and the adsorption effect of BPA in aqueous solution was better.

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History
  • Received:May 07,2022
  • Revised:July 29,2022
  • Adopted:August 04,2022
  • Online: December 26,2022
  • Published: September 30,2022
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