發(fā)布時間：2018-05-08 16:27

  本文選題：Janus顆粒 + Pickering乳液��； 參考：《遼寧大學(xué)》2017年碩士論文

【摘要】：Janus顆粒兩側(cè)具有相反的表面潤濕性時能夠構(gòu)筑高穩(wěn)定的Pickering乳液,將離子液體功能基團(tuán)引入到Janus顆粒表面,可賦予其通過陰離子交換對兩親性進(jìn)行調(diào)控的能力。本文討論了離子液體基Janus顆粒穩(wěn)定的Pickering乳液相反轉(zhuǎn)的影響因素,同時研究了其作為高內(nèi)相乳液(HIPEs)的乳化劑,對利用乳液模板法制備聚合物多孔材料的孔結(jié)構(gòu)的影響。主要研究內(nèi)容如下:(1)通過乳液界面自組裝的方法制備了一側(cè)為咪唑啉基,一側(cè)分別為苯基、正辛基、十八烷基的Janus中空球,經(jīng)過粉碎得到片狀Janus材料,進(jìn)一步離子液體化,可得到一側(cè)是咪唑啉氯鹽離子液體基,另一側(cè)為不同疏水基團(tuán)的Janus片。利用離子液體的陰離子可交換性得到不同陰離子基的Janus片。利用這些離子液體基Janus片乳化甲苯-水體系,討論了Janus片粒徑大小、不同疏水基、不同的陰離子對所穩(wěn)定的Pickering相反轉(zhuǎn)的影響。通過實驗發(fā)現(xiàn):Janus片粒徑大小對乳液粒徑大小有很大影響,疏水基和陰離子基不同都會引起Janus片表面潤濕性的不同,從而決定乳液液滴粒徑大小以及乳液類型的不同。(2)利用離子液體基雪人形Janus顆粒制備油包水型HIPEs,通過聚合連續(xù)相中的苯乙烯與二乙烯基苯,得到聚合物多孔材料。討論了乳化劑用量、表面親疏水性、不同類型的引發(fā)劑對聚合物多孔材料孔結(jié)構(gòu)的影響。通過實驗發(fā)現(xiàn)乳化劑用量增加,開孔程度增加;利用不同碳鏈長度的溴代烷進(jìn)行離子液體化后,雪人形Janus顆粒的疏水性隨碳鏈的增加而變強(qiáng),得到開孔結(jié)構(gòu)所需的乳化劑用量減少;油溶性引發(fā)劑可得到開孔結(jié)構(gòu),水溶性引發(fā)劑得到塌陷的閉孔結(jié)構(gòu)。
[Abstract]:When Janus particles have opposite surface wettability, high stable Pickering emulsions can be constructed, and the functional groups of ionic liquids can be introduced into the surface of Janus particles, which can give them the ability to regulate amphiphilicity by anion exchange. In this paper, the factors influencing the reverse transition of Pickering emulsion stabilized by ionic liquid-based Janus particles are discussed. At the same time, its effect on the pore structure of polymer porous materials prepared by emulsion template method as emulsifier of high internal phase emulsion (Hipes) is studied. The main contents of this study are as follows: (1) Imidazoline on one side and phenyl, octyl and octadecyl on the other side were prepared by the emulsion interface self-assembly method. The Janus hollow spheres were comminuted to obtain flake Janus materials, which were further ionic liquid. Imidazoline chloride ionic liquid group on one side and different hydrophobic groups on the other side were obtained. The anionic exchangeable properties of ionic liquids were used to obtain Janus tablets with different anionic groups. Using these ionic liquid-based Janus tablets to emulsify toluene-water system, the effects of particle size, different hydrophobic groups and different anions on the reverse transition of stable Pickering were discussed. It is found that the particle size of the Janus film has a great influence on the particle size of the emulsion, and the wettability of the Janus film will be caused by the difference of the hydrophobic group and the anionic group. Therefore, the size of droplets and the different emulsion types are determined.) the oil-in-water Hipes were prepared by using ionic liquid-based snowman Janus particles, and the polymer porous materials were obtained by polymerization of styrene and divinylbenzene in continuous phase. The effects of emulsifier dosage, surface hydrophobicity and different initiators on the pore structure of polymer porous materials were discussed. It was found that the amount of emulsifier increased and the degree of pore opening increased, and that the hydrophobicity of snow human Janus particles increased with the increase of carbon chain after ionic liquid with brominated alkanes of different carbon chain lengths. The amount of emulsifier needed for the open pore structure is reduced, the oil soluble initiator can obtain the open pore structure, and the water soluble initiator can obtain the closed pore structure which collapses.
【學(xué)位授予單位】：遼寧大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB383.4

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本文編號：1862116