| Boronate affinity is widely used in the field of separation materials as a pH response technique for capturing cis-diol containing compounds in solution.Luteolin and catechol are representative cis-diol containing compounds.The former has extremely high pharmaceutical value.The latter is an important water pollutant and chemical intermediate.Their specific recognition and separation are particularly important.Compared with traditional emulsion preparation of separation materials,the materials prepared by anisotropic emulsion method have a variety of structures and multifunctional applications,and combined with molecular imprinting technology with specific recognition function can construct multifunctional separation materials.In this paper,the emulsion template method was used to assist the preparation of anisotropic silicon-based materials with different morphological features.By functional modification of the two-sided functional groups and grafting of boronate affinity molecularly imprinted polymers,boronate affinity separation materials with different functions were obtained.A series of binding adsorption experiments were carried out on luteolin and catechol.The main research contents are as follows:(1)Study on selective adsorption separation of luteolin by anisotropic boron-affinity magnetic molecularly imprinted nanocapsulesFirst,a silicon nanobottle having an amino group on the inner surface and a chlorine group on the outer surface was obtained by hydrolyzing polycondensation by adding three kinds of silane coupling agents having different hydrophilic and hydrophobic functional groups to the W/O emulsion.Secondly,the inner surface is introduced into the magnetic ferroferric oxide nano-particles by the high-temperature iron method,and the outer surface is grafted with the 4-vinylbenzeneboronic acid as the functional monomer and the luteolin as the template molecule by the ARGET-ATRP technique.A magnetic molecularly imprinted adsorbent selective for luteolin is obtained.Finally,the adsorbent was tested for pH,kinetics,equilibrium adsorption,selectivity and regeneration performance,and the adsorbent showed excellent adsorption performance.(2)Preparation of porous boronate affinity HIPEs by Janus Nanosheets for Selective Separation of CatecholFirst,a silicon-based nanosheet having an amino group on one side and a chlorine group on one side was prepared by an emulsion template method.Next,it was used as a Pickering particle-stabilized O/W type high internal phase emulsion and the external phase polymerization was initiated to obtain a porous polymer.Then,ARGET-ATRP polymerization is initiated on the surface of the polymer to effect grafting of the phenylboronic acid molecularly imprinted polymeric layer with catechol as a template molecule.Finally,the adsorbent showed good adsorption performance by performing a series of static adsorption tests on the adsorbent.(3)Anisotropic emulsion construction of boronate affinity imprinted nanosheets for selective adsorption of catechol and its application in molecularly imprinted stir barIn order to obtain a more efficient selective adsorption agent with higher adsorption capacity,a boronate affinity imprinted nanosheet was constructed and applied to the adsorption and plaque stirring rod of catechol.An anisotropic nanosheet with an amino group on one side and a carbon-carbon double bond group on one side was prepared by an O/W emulsion template.A boric acid imprinted polymer layer using catechol as a template was grafted onto the side of the nanosheet by initiating a precipitation polymerization reaction.The boronate affinity imprinted nanosheets were tested for adsorption performance and exhibited excellent kinetics and adsorption properties.Finally,by attaching the other side of the nanosheet to the outer wall of the glass tube with the magnetic inner core,a molecularly imprinted stirring rod having a selective recognition and adsorption function for catechol is obtained. |
