Design, Synthesis And Basic Research Of A New Type Of Oil Displacement Material Based On POSS Temperature And Salt Resistance

As an important energy resource and basic chemical raw material,the demand of petroleum is increasing day by day with the rapid development of economy.Due to the limitations of current EOR technology,a large number of crude oil resources have not been developed efficiently.China's oil consumption gap is huge and oil resources are in short supply.It will severely restrict economic development and affect national strategic security.Considering the current situation of EOR,a new type of oil displacement material based on POSS was designed and synthesized in the paper.The new material has the properties of temperature resistance and salt resistance,which can solve the problem of liquid/liquid interface and liquid/solid interface.The first chapter of this paper systematically reviewed the current research status of EOR at home and abroad.The mechanism of the new material to solve the two interfaces?liquid/liquid interface and liquid/solid interface?was explained.Based on the research of T₈?CH=CH₂?₈ POSS monomers,the second chapter studied the reaction conditions of T₈?CH=CH₂?₂?CH₃?₆ POSS and T₈?CH=CH₂??CH₃?₇ POSS.Using methyltrimethoxysilane and vinyltrimethoxysilane as raw materials,hydrolysis and condensation reaction under acidic condition were used to synthesize T₈?CH=CH₂?₂?CH₃?₆ POSS and T₈?CH=CH₂??CH₃?₇ POSS.The third chapter mainly studied the framework of new oil displacement functional materials containing hydrogen siloxane.Using octamethyl cyclotetrasiloxane?D₄?and1,3,5,7-tetramethyl cyclotetrasiloxane?D₄H?as the reaction substrate,hexamethyldisiloxane?MM?as end-capper,the ring-opening reaction of cyclosiloxane synthesized new oil displacement functional materials containing hydrogen siloxane under acidic condition.The fourth chapter mainly studied the framework of phosphate ester terminated.An?-aminophosphonate double end-capper was synthesized by alcoholysis reaction,amination reaction,kabachnick-fields reaction and hydrolysis reaction.At this time,the skeleton can directly react with D₄ by ring-opening reaction to obtain a new oil displacement material.The molecule also contained secondary amine active hydrogen,which can further react with POSS monomers.In the fifth chapter,based on the existing research,a new type of oil displacement material based on POSS was synthesized by hydrosilylation reaction with T₈?CH=CH₂?₈ POSS monomers,maleic acid monoethyl ester and the framework of new oil displacement functional materials containing hydrogen siloxane.The final chapter of studied the ability and efficiency of the new type of oil displacement material based on POSS to reduce surface tension.The cmc is 119.07mg/L,the lowest surface tension is 32.20 m N/m.The new material has the properties of temperature resistance and salt resistance.The contact angle of the modified glass plate with water can reach 84°,and the contact angle of glass plate with petroleum can reach 56°.It shows improvement hydrophobic and oleophobic properties.