Design And Prepare Of Porous Polymer To Adsorb Acteoside

Acteoside(ACT)is the main active component in phenylethanol glycosides from Cistanche tubulosa.It has a variety of pharmacological actions,and has potential application value in many fields.However,the chemical compositions are complex,the molecular structure is similar,and the content of ACT in Cistanche tubulosa is low.It is a challenge to realize the efficient adsorption of ACT.Thus,the design and preparation of adsorbent with excellent adsorption performance is the key for effectively separate ACT.In this paper,a series of adsorbents were designed and prepared.The adsorption performance of different adsorbents for ACT was explored through the regulated the physical structure(morphology,specific surface area and pore structure)and chemical structure(amino,hydroxide radical and benzene ring).The specific research contents of this thesis are as follows:(1)The polyethyleneimine(PEI)functionalized the porous polymers(PCMSs@PEI)were designed and prepared by the Pickering emulsion polymerization to adsorb ACT.The as-prepared PCMSs@PEI presented the porous passion fruit structure,and PCMSs@PEI-3 showed high ACT adsorption performance.This could attribute to as follow: on one hand,PCMSs@PEI-3 presented optimal porous passion fruit structure,and it had the large cavity and abundant pore structure.This not only enlarged the space of adsorption ACT but also increased the paths of ACT transfer to the interior of PCMSs@PEI-3,realizing the ACT adsorption;on the other hand,the introduction of PEI intensified the affinity between PCMSs@PEI-3 and ACT,and it made the multiple forces exist between PCMSs@PEI-3 and ACT,improving the selective adsorption of ACT.The results indicated that the adsorption capacity and selectivity of PCMSs@PEI-3 for ACT were 103.58±3.31mg/g and 8.05±0.23,respectively.In addition,adsorption-desorption cycle experiments indicated that PCMSs@PEI-3 had excellent regeneration performance.(2)The porous polymers of hyperbranched PEI functionalized carboxymethyl chitosan(CMC/PEI)were designed and prepared based on chemical crosslinking method to adsorb ACT.The as-prepared CMC/PEI presented porous honeycomb structure,and CMC/PEI-70000-4.5g showed the excellent ACT adsorption performance.This could attribute to as follow: on one hand,CMC/PEI-70000-4.5g presented the optimal honeycomb structure with abundant cavities.It made CMC/PEI-70000-4.5g show the high specific surface area and pore volume,which provided enough space to accommodate and adsorb ACT,improving the adsorption capacity of ACT.On the other hand,the functionalization of PEI formed the amino layers on the inner and outer surfaces of the pores.This would improve the affinity and enhance the multiple forces between CMC/PEI-70000-4.5g and ACT,realizing the selective adsorption for ACT.The results indicated that the adsorption capacity and selectivity of CMC/PEI-70000-4.5g were 125.67±4.51 mg/g and 5.38±0.16,respectively.In addition,the adsorption capacity of A still reached 92.6% of the original adsorption capacity after 6 adsorption-desorption cycle experiments.(3)The porous polymers of the hypercrosslinking β-cyclodextrin(Hβ-CDPs)were designed and prepared by the hypercrosslinked strategy to adsorb ACT.The as-prepared Hβ-CDPs presented porous rigid network structure,and Hβ-CDPs-4 showed the excellent adsorption performance.This could attribute to as follows:on one hand,Hβ-CDPs-4 presented the excellent porous rigid network structure.This greatly increased the specific surface area of Hβ-CDPs-4,which provided more adsorption sites for ACT,improving the adsorption capacity of ACT.On the other hand,Hβ-CDPs-4 had a mass of functional groups,such as-OH.It enhanced the affinity interaction and made the multiple forces exist between Hβ-CDPs-4 and ACT,realizing the selective adsorption for ACT.The results indicated that the adsorption capacity and selectivity were288.36±7.58 mg/g and 4.36±0.21,respectively.In addition,the adsorption capacity still obtained above 95%of the original adsorption capacity after 8 adsorption-desorption cycle experiments.