Study On Synthesis And Properties Of Amine-based Skeletal Porous Polymers

Organic microporous polymers derived from the polycondensation reaction of two or more kinds polyfunctional organometallic monomer are the porous polymers with amorphous crystal structure.Owing to the advantages of organic microporous polymers such as the diversity of monomer,the designability of structure,high the specific surface area,etc.,it has been used in the field of gas adsorption and separation widely.The main work in this report as following:(1)Amine framework porous polymers(AFPP)were prepared with melamine(MA)and terephthalic-aldehyde(TA).The influences of reaction condition(such as reaction time,reaction temperature,reaction proportion,etc.)were investigated.The structural changes were studied by infrared spectroscopy,carbon nuclear magnetic and nitrogen adsorption.Melamine(MA)and terephthalic-aldehyde(TA)react to form a microporous polymer.When MA/TA=2:3,the structure is the best,with a maximum surface area of 389.82m2g-1.(2)AFPP was modified by polyacrylic acid(PAA).The study found that the specific surface area of AFPP modified by PAA was increased and the reaction conditions were optimized.(3)AFPP and its PAA modified materials have good heat resistance performance from the study of thermal stability.And the stability of modified AFPP is better.(4)The hydrogen storage performance of all AFPP materials under room temperature was studied systematically.The specific surface area of AFPP material modified by PAA was found to be 485.12m2g-1.The maximum hydrogen storage capacity of constant pressure(5MPa)was significantly increased from 3.98wt%to 16.03 wt%mol/kg.The overall performance of hydrogen storage is good.