Design Porous Network Structure Adsorbent To Separate Acteoside

Cistanche tubulosa is a perennial rooting parasitic plant Its main components include phenylethanol glycosides(Ph Gs).Acteoside(ACT)is the main active component in Ph Gs.It has the functions of neuroprotection,immunity,moistening intestines and relieving constipation.The chemical compositions are complex and the molecular structure is similar in Ph Gs,it is a challenge to separate high-purity ACT.Thus,in this thesis,different types of porous network structure adsorbents were designed and prepared.The adsorption performance of different types of adsorbents was explored through the regulated the physical and chemical structure.The research contents of this thesis are as follows:The adsorbent HCPs-Kae with fishnet-like porous network structure were designed and prepared to separate ACT.Among them,HCP-Kae-3 showed the excellent adsorption performance.The main reasons are as follows: on one hand,HCP-Kae-3 presented the excellent a fish-like porous network structure,this structure made HCP-Kae-3 had large specific surface and pore volume,improving the adsorption capacity of ACT.On the other hand,the HCP-Kae-3 surface contained a large number of oxygen-containing groups,it enhanced the affinity interaction and made multiple forces exist between HCP-Kae-3 and ACT,improving the selective adsorption for ACT.The result of research showed that the adsorption capacity and selective adsorption were 77.52 mg/g and 3.41.After 6 adsorption-desorption cycle experiments,HCP-Kae-3 still had the good regeneration performance.The adsorbent HCPs@Tyr with rosette-like porous network structure were designed and prepared to separate ACT.Among them,HCP@Tyr-4 showed the excellent adsorption performance.The main reasons are as follows: in the first place,HCP@Tyr-4 presented the excellent a rosette-like porous network structure,it had the large cavity inside.For this reason,it could accommodate and adsorb more ACT,improving the adsorption capacity of ACT.In the second place,after the modification of tyrosine,HCP@Tyr-4 had a mass of polar groups,such as amino,carboxyl and oxhydryl,it would improve affinity and enhance the multiple forces between HCP@Tyr-4 and ACT,realizing the selective adsorption for ACT.The result of research indicated that the adsorption capacity and selective adsorption were 156.37 mg/g and 3.62.After 8adsorption-desorption cycle experiments,the adsorption capacity of HCP@Tyr-4 still more than 95.2% of the initial adsorption capacity,it proved that HCP@Tyr-4 had excellent reusability.The adsorbent HCPC with cellular-like porous network structure were designed and prepared to separate ACT.Among them,HCPC-3 showed the excellent adsorption performance.The main reasons are as follows:on one hand,HCPC-3 presented the ideal cellular foam porous network structure,at the same time,it had abundant pore and large specific surface area,which provided more adsorption sites for ACT,improving the adsorption capacity of ACT.On the other hand,HCPC had lots of oxygen-containing functional groups,improving the selective adsorption for ACT.The result of research indicated that the adsorption capacity and selective adsorption were 423.27 mg/g and 1.2.After 8 adsorption-desorption cycle experiments,the adsorption capacity of HCP@Tyr-4 still more than 95.6% of the initial adsorption capacity,it proved that HCP@Tyr-4 had excellent regeneration performance.