Premium
Preparation of organic‐inorganic hybrid porous materials and adsorption characteristics for (–)‐epigallocatechin gallate and caffeine from the extract of discarded tea
Author(s) -
Liu Yi,
Liu Yongfeng,
Wu Xiaoyu,
Zhang Junhan,
Pei Dong,
Wei Jianteng,
Di Duolong
Publication year - 2015
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24130
Subject(s) - adsorption , materials science , chemical engineering , porosity , stacking , polymerization , hydrogen bond , porous medium , organic chemistry , composite material , chemistry , polymer , molecule , engineering
A series of novel organic–inorganic hybrid porous materials were synthesized using the method of suspension polymerization. As content of oleic acid‐coated TiO 2 introduced increased, the surface area, pore volume, and average pore diameter increased, and meantime macropores appeared. The adsorption efficiencies of the porous materials for (−)‐epigallocatechin gallate (EGCG) and caffeine (CAF) were enhanced, due to synergistic effect of surface area, pore volume, average pore diameter, and several driving forces such as charge induced force, π–π stacking, and hydrogen bond. Adsorption kinetic analysis indicated that pseudo‐second‐order kinetics can reasonably depict the adsorption process, and intraparticle diffusion became more obvious after a contact time of 30 min. Adsorption isotherm analysis indicated Freundlich isotherm could be used to describe the adsorption process. Charge induced force, π–π stacking, hydrogen bond, and sieving effect of pores were the main driving forces for the adsorption of EGCG and CAF by the organic–inorganic hybrid porous materials. This study will open possibility of expanding number and types of porous materials and provide assistance in tailoring corresponding physical–chemical properties, according to specific analytes. POLYM. ENG. SCI., 55:2414–2422, 2015. © 2015 Society of Plastics Engineers