Study On New Styrene Style Adsorption Resins

Hydrophobic-hydrophilic interpenetrating polymer network（IPN） resin is the polymer consisting of one hydrophobic network and another hydrophilic network through permanent entanglement in the macromolecular chains.The compound from the natural drug or organic contaminant in the demand of being put away is always composed of hydrophobic group and hydrophilic group.Because of the affinity of hydrophobic network for hydrophobic group and the affinity of hydrophilic network for hydrophilic group,the hydrophobic-hydrophilic IPN resin adsorb the compound composed of hydrophobic group and hydrophilic group stronger than hydrophobic resin or hydrophilic resin does.One emphasis was studied that three kinds of hydrophobic-hydrophilic IPN resin were synthesized through the compatibility of hydrophobic network and hydrophilic network with the IPN technology according to the model molecular structure.Adsorption performance of these resins for model molecular was studied further.The hypercrosslinked resin with very good adsorption capacity was reported by a lot of literature.Correlative products of the hypercrosslinked resin have been industrialized.All was reported that poisonous and cancer-causing nitrobenzene was used for solvent in the synthesis of the hypercrosslinked resin.Another emphasis was studied that three kinds of hypercrosslinked resin modified with polarity functional group were prepared by Friedel-Crafts reaction.Dichloroethane was used as solvent and ferric chloride was used as catalyst.Adsorption performance of these resins for model molecular was investigated further.The main contents and conclusions in this thesis are followed as:The hydrophobic-hydrophilic macroporous polydivinylbenzene/poly（sodium acrylate） IPN（PDVB/PNaA IPN） was prepared at the aim of adsorption for quaternary ammonium type alkaloids such as berberine.On the one hand the hydrophobic PDVB in the PDVB/PNaA IPN resin has the ability of adsorption for berberine using hydrophobic interaction,and on the other hand the hydrophilic PNaA in the PDVB/PNaA IPN resin has the ability of adsorption for berberine using ion exchange interaction.The effects of different mass ratio of the two networks and the effects of different cross-linking degree of the second network on the pore structure and adsorption capacity of PDVB/PNaA EPN resin were studied.The PDVB/PNaA IPN resin whose adsorption quantity was the biggest was chosen to study further.The pore structure,the weak acid exchange capacity,the water retention capacity,and the swelling ability of PDVB/PNaA IPN resin were measured.The study focused on the adsorption isotherms of berberine at different temperatures.Isosteric adsorption enthalpy,adsorption Gibbs free energies could be calculated according to thermodynamic functions.The results show that the saturated adsorption quantity of berberine was up to 109.4mg·mL^-1（wet resin） by the way of dynamic adsorption and desorption experiment at 293 K.The resin could be reused by the mixture with 0.5% sodium chloride and 80%ethanol.For the adsorption studies salicylic acid was chosen as the representative of aromatic acids,because there is a hydrophobic benzene ring and a hydrophilic hydroxyl group in the molecule.The hydrophobic-hydrophilic macroporous polydivinylbenzene/poly（N-2-aminoethylacrylamide） interpenetrating polymer （PDVB/PNAEAM IPN） was prepared at the aim of adsorption for salicylic acid.The hydrophobic PDVB part in PDVB/PNAEAM IPN resin has the ability of adsorption through hydrophobic interaction;on the other hand the hydrophilic PNAEAM part has the ability of adsorption by means of hydrogen bond.The pore structure,the weak base exchange capacity,the water retention capacity and the swelling ratio of PDVB/PNAEAM IPN resin were measured.The adsorption isotherms of salicylic acid at different temperatures were studied.Isothermal adsorption enthalpy,Gibbs free energy and entropy were calculated according to thermodynamic equations.The adsorption of salicylic acid onto the PDVB/PNAEAM IPN resin is better than that of NDA-100 resin.The saturated adsorption capacity for salicylic acid was up to 46.1 mg/mL（wet resin） according to the dynamic adsorption and desorption experiments at 293K.The resin can be regenerated by 4%NaOH.For the adsorption studies quinoline was chosen as the representative,because a lot of alkaloid molecules have the unit of quinoline.Hydrophobic-hydrophilic macroporous polydivinylbenzene/poly（acrylic acid） IPN（PDVB/PAA IPN） was prepared at the aim of adsorption for quinoline,which was composed of two networks, one was hydrophobic PDVB,the other was hydrophilic PAA.The hydrophobic PDVB part in PDVB/PAA IPN resin had the ability of adsorption through hydrophobic interaction;on the other hand the hydrophilic PAA part has the ability of adsorption by means of hydrogen bond.The pore structure,the weak acid exchange capacity,the water retention capacity and the swelling ratio of PDVB/PAA IPN resin were measured.The research focused on the adsorption isotherms of quinoline at different temperatures.Isosteric adsorption enthalpy,adsorption Gibbs free energies and adsorption entropy could be calculated according to thermodynamic functions.The adsorption kinetic date fitted to the Lagerren first order rate equation.Intrapartical diffusion was the rate controlling step and could be described by HSDM model.The hypercrosslinked resin modified with acetylaniline was synthesised with chloromethylated polystyrene and acetylaniline by Friedel-Crafts reaction. Dichloroethane was used as solvent and ferric chloride was used as catalyst.The research focused on the effects of reaction conditions on the pore structures of resin and the adsorption capacity for vanillin.The results showed that the optimum reaction condition was attained as follows:the reaction temperature 80℃,8%mass ratio of acetylaniline to chloromethylated polystyrene,25%mass ratio of ferric chloride to chloromethylated polystyrene,reaction time 10-12h.Because Aniline can not react with chloromethylated polystyrene,The hypercrosslinked resin with aniline as crosslinked bridge was synthesised by the hydrolysis of the hypercrosslinked resin modified with acetylaniline.Adsorption performance of the resin for salicylic acid was studied further.The research focused on the adsorption isotherms of salicylic acid at different temperatures,which fitted well into Freundlich adsorption equation.The adsorption kinetic date fitted to the Lagerren second order rate equation.Intrapartical diffusion was the main rate-controlling step.The results showed that the saturated adsorption quantity of salicylic acid was up to 119.9mgmL^-1（wet resin） at 293K.The resin could be reused by 6BV ethanol.Compared with the hypercrosslinked resin modified with acetylaniline,the hypercrosslinked resin modified by acetaminophen could be enhanced the surface area because the phenolic hydroxyl group of acetaminophen could improve the action of benzene ring;The hypercrosslinked resin modified by acetaminophen could be enhanced the adsorption capacity because of the hydrogen bond site of acetamino group and hydroxyl group.The hypercrosslinked resin modified with acetaminophen was synthesised with chloromethylated polystyrene and acetaminophen by Friedel-Crafts reaction.Dichloroethane was used as solvent and ferric chloride was used as catalyst.The objective of this work was to study the adsorption thermodynamics and adsorption kinetic of the kind of hypercrosslinked resin.The adsorption capacity for bisphenol A onto the hypercrosslinked resin modified by acetaminophen is 2.58 times as high as that of polysulphone micro-ball embedded with activated carbon.The adsorption isotherms of bisphenol A at different temperatures fitted well into Freundlich adsorption equation.The adsorption kinetic date of bisphenol A fitted to the first order rate equation.The intrapartical diffusion of bisphenol A was the main rate-controlling step.The results showed that the saturated adsorption quantity of vanillin was up to 119.1mg·mL^-1（wet resin） at 293K.The resin could be reused by 80%ethanol.The adsorption kinetic date of vanillin fitted to the second order rate equation.The intrapartical diffusion of vanillin was the main rate-controlling step.