本文選題：聚合物復(fù)合微球　切入點(diǎn)：分散聚合法　出處：《西安石油大學(xué)》2016年碩士論文

【摘要】：本文首先對(duì)聚合物微球P(MA-AM)的合成工藝條件進(jìn)行了優(yōu)化實(shí)驗(yàn),通過(guò)考察單體濃度、分散劑濃度、引發(fā)劑濃度以及混合溶劑比例等因素對(duì)聚合反應(yīng)后聚合物分子量的影響,對(duì)分散聚合法的合成工藝條件進(jìn)行了優(yōu)化。得到最佳的優(yōu)化結(jié)果為:乙酸乙酯∶乙醇=7∶3、單體濃度:0.4×102g/L、引發(fā)劑濃度:0.24g/L、分散劑濃度:2.0g/L。其次成功的制備出納米SiO2、納米Fe3O4@SiO2粒子以及新型SiO2/P(MA-AM)和Fe3O4@SiO2/P(MA-AM)復(fù)合微球調(diào)剖劑。其中,利用共沉淀法制得的納米Fe3O4顆粒具有一定的球形形貌,但由于其自身的磁性特征,出現(xiàn)明顯的團(tuán)聚現(xiàn)象;采用分步加入TEOS的方法,通過(guò)控制TEOS的加入量制得的納米SiO2粒子以及Fe3O4@SiO2復(fù)合粒子形貌良好、單分散性良好、粒徑均一;采用傅里葉紅外光譜儀、掃描電子顯微鏡以及透射電子顯微鏡對(duì)聚合物復(fù)合微球的結(jié)構(gòu)進(jìn)行了表征分析,表明在Fe3O4粒子表面形成了穩(wěn)定的SiO2結(jié)構(gòu),即核殼型;硅烷偶聯(lián)劑KH-570對(duì)SiO2粒子以及Fe3O4@SiO2復(fù)合粒子進(jìn)行了成功的改性;經(jīng)過(guò)分散聚合反應(yīng)之后,SiO2/P(MA-AM)復(fù)合微球和Fe3O4@SiO2/P(MA-AM)復(fù)合微球都將SiO2粒子或Fe3O4@SiO2復(fù)合粒子完全的包覆在微球的內(nèi)部,構(gòu)成了無(wú)機(jī)-有機(jī)聚合物復(fù)合微球結(jié)構(gòu)。繼而對(duì)制得的聚合物復(fù)合微球的綜合性能進(jìn)行了考察研究,從溶脹性、流變性以及封堵性方面對(duì)其進(jìn)行了分析考察。結(jié)果表明:聚合物復(fù)合微球具有良好的吸水膨脹性能,并且具有一定的耐鹽耐溫以及封堵性能。最后通過(guò)巖心流動(dòng)裝置實(shí)驗(yàn),考察研究了聚合物復(fù)合微球的調(diào)剖堵水性能,發(fā)現(xiàn)聚合物復(fù)合微球SiO2/P(MA-AM)與Fe3O4@SiO2/P(MA-AM)對(duì)模擬巖心均具有較高的封堵率,尤其是對(duì)于中低滲透巖心具有更為良好的封堵效果;在水驅(qū)的基礎(chǔ)上,SiO2/P(MAAM)復(fù)合微球體系可提高采收率在16%左右,Fe3O4@SiO2/P(MA-AM)復(fù)合微球體系可提高采收率在9%左右。
[Abstract]:In this paper, the synthesis conditions of polymer microspheres (PMA-AM) were optimized. The effects of monomer concentration, dispersant concentration, initiator concentration and mixed solvent ratio on the molecular weight of the polymer were investigated.The synthetic conditions of dispersion polymerization were optimized.The optimum results are as follows: ethyl acetate: ethanol 7: 3, monomer concentration: 0.4 脳 10 ~ 2 g / L, initiator concentration: 0.24 g / L, dispersant concentration: 2.0 g / L.Secondly, nano-SiO _ 2, nanometer Fe3O4@SiO2 particles and new Sio _ 2 / PnMA-AMs and Fe _ 3O _ 4 / Sio _ 2 / Fe3O4@SiO2 composite microspheres were successfully prepared.Among them, the nanometer Fe3O4 particles prepared by coprecipitation method have a certain spherical morphology, but due to their own magnetic characteristics, there is obvious agglomeration phenomenon.The nanosized SiO2 particles and Fe3O4@SiO2 composite particles prepared by controlling the addition of TEOS have good morphology, good monodispersity and uniform particle size.The structure of polymer composite microspheres was characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM). It was found that a stable SiO2 structure was formed on the surface of Fe3O4 particles, that is, core-shell structure.紜呯兎鍋惰仈鍓侹H-570瀵筍iO2綺掑瓙浠ュ強(qiáng)Fe3O4@SiO2澶嶅悎綺掑瓙榪涜浜?jiǎn)鎴愬姛鐨勬斠?guī)，

本文編號(hào)：1704324