本文選題：雙重同軸三孔發(fā)生器　切入點：兩步法　出處：《物理學報》2017年04期

【摘要】：在采用乳液微封裝技術(shù)制備慣性聚變用聚-α-甲基苯乙烯(PAMS)靶丸芯軸過程中,以氟苯為油相溶劑,水溶性聚合物水溶液為外水相制備水包油包水(W1/O/W2)雙重復(fù)合乳粒,對復(fù)合乳粒進行固化干燥得到PAMS靶丸芯軸.本文設(shè)計搭建了一套雙重同軸乳粒發(fā)生器,用微流控技術(shù)產(chǎn)生PAMS靶丸復(fù)合乳粒,該乳粒發(fā)生器采用兩種不同結(jié)構(gòu):"兩步法"通道與"一步法"通道.研究了利用此乳粒發(fā)生器制備復(fù)合乳粒過程中,乳粒形成機理及三相流速對乳粒尺寸調(diào)控規(guī)律.實驗結(jié)果顯示,乳粒發(fā)生器結(jié)構(gòu)上的細小差異會極大地影響乳粒形成機理以及尺寸變化規(guī)律.在"兩步法"通道結(jié)構(gòu)中,內(nèi)水相流速對復(fù)合乳粒的形成及外徑無明顯影響,而外徑隨外水相流速的變化規(guī)律與單乳粒實心液滴(O/W2)尺寸變化規(guī)律相同;在固定體系中,乳粒尺寸取決于內(nèi)水相與油相流速之和及外水相流速,而與內(nèi)水相和油相流速之比無關(guān).然而在"一步法"通道中,由于W1-O界面的存在,內(nèi)水相流速對復(fù)合乳粒外徑的影響非常大;復(fù)合乳粒外徑不僅與內(nèi)層相界面的界面張力大小有關(guān),還與內(nèi)水相與油相流速之比有關(guān).最后,將實驗中的雙重復(fù)合乳粒置于水溶性聚合物水溶液中進行固化,得到毫米級空心聚合物微球.
[Abstract]:In the process of preparing the core axis of poly- 偽 -methylstyrene (PAMS) target for inertial fusion by using emulsion microencapsulation technology, water / oil / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water / water. The core axis of PAMS target was obtained by curing and drying the composite emulsion. In this paper, a set of double coaxial emulsion generator was designed and constructed. The PAMS target compound emulsion was produced by microfluidic technique. There are two different structures used in the emulsion generator: "two-step" channel and "one-step" channel. The mechanism of grain formation and the regulation of three-phase flow rate on the grain size. The experimental results show that the small differences in the structure of the particle generator greatly affect the mechanism of grain formation and the regularity of size change. In the "two-step method" channel structure, The internal water phase flow rate had no significant effect on the formation and outer diameter of the composite emulsion, but the variation of the external diameter with the external water phase velocity was the same as that of the single emulsion solid droplet O / W _ 2. The size of emulsion depends on the sum of the flow rate of internal water phase and oil phase and the flow rate of external water phase, but not on the ratio of internal water phase and oil phase flow rate. However, in the "one-step" channel, due to the existence of W1-O interface, The external diameter of composite emulsion is related not only to the interfacial tension of the inner phase, but also to the ratio of internal water phase to oil phase velocity. The double composite emulsion particles in the experiment were solidified in water soluble polymer aqueous solution to obtain millimeter hollow polymer microspheres.
【作者單位】： 中國工程物理研究院激光聚變研究中心;
【基金】：NSAF基金(批準號:U1530260)資助的課題~~
【分類號】：O632.13;O648.2

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