In the present study, a novel hydrophobic/hydrophilic polystyrene/polyamide interpenetrating poly-mer network (PS/PAM IPN) was synthesized and its mo-lecular structure was characterized by Fourier transforminfrared ray (FT-IR) spectrum, chomical analysis, swelling test, and N2 adsorption-desorption experiment. The obtained PS/PAM IPN was employed as a polymeric ad-sorbent to adsorb quercetin from aqueous solution, and the adsorption thermodyanmics were calculated according to thermodynamic equations. It was found that no chemi-cal bond was formed between PS and PAM and PS/PAM IPN held characters of amphiphilic polymer network (APN). The adsorption isotherms could be well fitted by Freundlich isotherm, and the adsorption was shown to bean exothermic, spontaneous, and more ordered process. The total adsorption capacity from the column adsorption experiment was measured to be 8.6 mg/mL wet resin, and the adsorbed quercetin on PS/PAM IPN could be easily desorbed by 10% of hydrochloric acid-ethanol.

Macroporous cross-linked poly(N-methyl-N-p-vinylbenzylacetamide)(PMVBA),poly(N-methyl-N-p-vinylbenzylcaprolactam)(PMVBC),and poly(N-methyl-N-p-vinylbenzylurea)(PMVBU) were synthesized and their adsorption behavior for phenol in cyclohexane was investigated.The results indicated that the adsorption capacities of phenol on the three adsorbents followed the order PMVBU>PMVBA>PMVBC.Adsorption isotherms of phenol on the three polymeric adsorbents were measured and correlated to a Freundlich isotherm.Adsorption enthalpy,adsorption Gibbs free energy,and adsorption entropy were calculated using thermodynamic function relationships.It was found that the adsorption enthalpy of phenol on PMVBU was almost twice that on PMVBA and PMVBC.Analysis of the adsorption mechanism suggested that hydrogen bonding was the primary driving force for phenol adsorbed on the adsorbents in cyclohexane,and multiple hydrogen bonding was involved for PMVBU with phenol.

The macroporous polydivinylbenzene/poly(methyl acrylate) interpenetrating polymer network (PDVB/PMA IPN) was prepared by the sequential suspension polymerization method. and was modified to be hydrophobic-hydrophilic macroporous polydivinylbenzene/poly (sodium acrylate) IPN (PDVB/PNaA IPN) by converting the PMA to PNaA under the condition of base. The effects of different mass ratio of the two networks and different cross-linking degree of the second network on the pore structure and adsorption capacity of PDVB/PNaA IPN resin were studied. The PDVB/PNaA IPN resin whose adsorption quantity is 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. lsosteric adsorption enthalpy. adsorption Gibbs free energies can be calculated according to thermodynamic functions. The resuks show that the saturated adsorption quantity of berberine is up t0 109.4 mg ml-l (wet resin) by the way of dynamic adsorption and desorption experiment. The resin could be reused by the mixture with 0.5% sodium chloride and 80% ethanol. On the one hand the hydrophobic PDVB in the PDVB/PNaA IPN resin has the ability of adsorption usingπ-π interaction. and on the other hand the hydrophilic PNaA in the PDVB/PNaA IPN resin has the ability of adsorption using ion exchange interaction. An important conclusion can be drawn that the PDVB/PNaA IPN resin has a promising application prospect in extracting and separating quaternary ammonium type alkaloids such as berberine.

Efficient removal of phenol and its derivatives from wastewater is of significant environmental concern. In the present study, the adsorption behaviors of three polymeric adsorbents with amide groups, PMVBA, PMVBC, and PMVBU, for phenol were investigated in aqueous solution. The adsorption in relation to the solution pH value was discussed and the neutral pH was optimum. The adsorption dynamic cure was determined and it was shown that the pseudo-second-order rate equation characterized the adsorption better and the intraparticle diffusion was the rate-limiting step. The adsorption isotherms were measured and correlated to Freundlich isotherms, and it was shown that PMVBU held the largest adsorption capacity. The adsorption thermodynamic parameters were calculated and it was seen that the adsorption enthalpy of phenol onto the three adsorbents follows the order PMVBU > PMVBA > PMVBC. Analysis of the adsorption mechanism suggested that hydrogen bonding played a predominant role and multiple hydrogen bonding was involved for phenol and PMVBU.

A phase transfer catalyst library with 50 kinds of polystyrene-supported quaternary ammonium salt catalyst was synthesized by the reaction of 10 kinds of chloromethylated crosslinked polystyrene with five tert-amines using the portioning-mixing method. The Br/I anion exchange reaction of hexyl-bromide and borohydride reduction of acetophenone were used as the probing reactions to screen out the most active catalysts for each reaction using the iterative deconvolution method. For the Br/I anion exchange reaction of hexyl-bromide, the catalytic activity of the phase transfer catalyst was mainly affected by the lipophilicity of the active sites, and the most active catalyst was a macroporous strongly basic anion exchange resin (1). However, for the borohydride reduction of acetophenone, a gel-type (microporous) strongly basic anion exchange resin (2) was the most active catalyst, and a hydrogen bonding promoted catalytic mechanism was proposed to explain the high catalytic activity of the catalyst.