含氟聚醚有机硅消泡剂的合成及性能研究-应用化学专业论文.docxVIP

Finally, compound FPSi defoamer was obtained in accordance with its optimal conditions. In order to test the defoaming and antifoaming performance of the proposed defoamer, the defoamer was applied to aqueous phase, oil phase and the drilling fluid. The results showed that a good defoaming effect was achieved at Su-77-5-8H by using the proposed FPSi defoamer. Compound FPSi defoamer possesses such advantages as inert, non-toxicity, non-polluting and environment-friend and resistant to high temperature, acid and alkali resistance, which was suitable for use in harsh conditions. Studies show that, because fluorinated silicone oil possesses unparalleled low surface tension, it has been widely used in the defoamer field. The introduction of polyether chains can reduce its surface tension. Compared with the same type of fluorinated polyether silicone oil, the proposed fluorinated silicone oil possesses a lower surface tension (22.20 mN·m-1) and thus has excellent defoaming effect. Key words: Dimethyl silicone oil; fluorinated polyether silicone oil; compounding; defoamer ; antifoaming performance Thesis : Applied Study 目 目 录 I I I II 目 录 1 前言 1 1.1 泡沫的产生及性质 1 1.1.1 泡沫产生的条件 1 1.1.2 泡沫的分类 2 1.1.3 泡沫的性质 3 1.2 消泡与消泡剂 3 1.2.1 消泡机理 3 1.2.2 消泡剂应具备的性能 4 1.2.3 常用的消泡剂有 5 1.2.4 消泡剂的研究方向 7 1.3 消泡剂的发展与现状 7 1.3.1 有机硅消泡剂的发展历程 7 1.3.2 聚醚改性硅油消泡剂 9 1.3.3 有机氟改性硅油消泡剂 10 1.3.4 有机硅消泡剂的发展现状 11 1.4 课题的研究目的与研究内容 13 1.4.1 研究目的 13 1.4.2 研究内容 14 2 含氟聚醚有机硅油的设计与合成 15 2.1 含氟聚醚有机硅油的合成机理 15 2.2 含氟聚醚有机硅油的合成 16 2.2.1 试剂与仪器设备 16 2.2.2 Speier 催化剂的配制 17 2.2.3 合成含氟聚醚有机硅油的装置图 17 2.3 实验操作步骤 18 2.3.1 端基含氢氟硅油的制备 18 2.3.2 引入聚醚链段 18 2.4 性能表征 19 HYPERLINK \l _TOC_250001 2.4.1 对产物 FPSi 进行红外光谱(FT-IR)分析 19 目 录 HYPERLINK \l _TOC_250000 2.4.2 对产物 FPSi 进行凝胶色谱(GPC)分析 20 2.5 本章小结 22 3 消泡剂最佳复配条件的选择 23 3.1 白炭黑的选择与用量对消泡剂性能的影响 23 3.1.1 疏水白炭黑的制备 23 3.1.2 消泡性能测试方法 25 3.1.3 白炭黑的用量对消泡剂的影响 25 3.1.4 白炭黑的用量与稳定性 26 3.2 含氟聚醚硅油的用量对消泡剂性能的影响 27 3.3 乳化剂选择及用量对消泡剂性能的影响 28 3.4 甲基硅油粘度及用量对消泡剂性能的影响 29 3.5 增稠剂对消泡剂性能的影响 30 3.6