聚醚和含氟酯共改性苯基含氢硅油的制备及消泡性能
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摘要
以10-十一烯酸四氟丙酯(UATE)、聚醚(F-6)和苯基含氢硅油为原料,氯铂酸为催化剂,经硅氢加成反应合成了长链含氟烷基酯与聚醚共改性苯基含氢硅油(UAPFPS)。通过FT-IR和1H NMR对UAPFPS的结构进行了表征,采用单因素试验对反应中各影响因素进行考察得到其较佳工艺参数为:反应温度110 ℃,反应时间5.5 h,n(Si-H) ∶n(C=C)=1∶1.2,n(F-6) ∶ n(UATE)=1∶1,催化剂用量20 μg/g(相对于每克反应物)。在此条件下Si-H键转化率为95.30%。将UAPFPS、硅膏、乳化剂和增稠剂复配制得改性有机硅消泡剂,其性能测试结果表明,该消泡剂具有较好的消泡性、抑泡性与稳定性。
10-Undecenoic acid tetrafluoropropyl ester(UATE), allyl polyether(F-6) and phenyl hydrogencontaining silicone oil were used as raw materials. Chloroplatinic acid was used as catalyst. The phenyl hydrogencontaining silicone oil co-modified with polyether and fluorine-containing ester(UAPFPS) was synthesized via hydrosilylation. The structure of UAPFPS was characterized by FT-IR and 1 H NMR. The optimum parameters were obtained by single factor experiment: the reaction temperature was 110 ℃; the reaction time was 5.5 h;n(Si-H) ∶n(C=C)=1∶1.2; n(F-6) ∶n(UATE)=1∶1; the amount of catalyst is 20 μg/g(relative to each gram of reactant). Under this condition, the conversion of Si-H bonds was 95.30%. A modified silicone defoamer was prepared by compounding UAPFPS, silicone paste, emulsifiers and thickener. The results of performance test show that the defoamer has good defoaming properties, foam inhibition and stability.
10-Undecenoic acid tetrafluoropropyl ester(UATE), allyl polyether(F-6) and phenyl hydrogencontaining silicone oil were used as raw materials. Chloroplatinic acid was used as catalyst. The phenyl hydrogencontaining silicone oil co-modified with polyether and fluorine-containing ester(UAPFPS) was synthesized via hydrosilylation. The structure of UAPFPS was characterized by FT-IR and 1 H NMR. The optimum parameters were obtained by single factor experiment: the reaction temperature was 110 ℃; the reaction time was 5.5 h;n(Si-H) ∶n(C=C)=1∶1.2; n(F-6) ∶n(UATE)=1∶1; the amount of catalyst is 20 μg/g(relative to each gram of reactant). Under this condition, the conversion of Si-H bonds was 95.30%. A modified silicone defoamer was prepared by compounding UAPFPS, silicone paste, emulsifiers and thickener. The results of performance test show that the defoamer has good defoaming properties, foam inhibition and stability.
引文
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[2]Kim D W,Noh S T,Jo B W.Effect of salt and pH on surface active properties of comb rake-typepolysiloxane surfactants[J].Colloids Surf.A Physicohem.Eng.Asp.,2006,287:106-116.
[3]Liu H J,Lin L H,Chen K.Synthesis and surface activity of polyethylene glyco-lmaleic anhydride-polydimethylsiloxane polyester surfactants[J].Colloids Surf.A:Physicochem.Eng.Asp.,2003,215(1):213-219.
[4]He Yin,Wang Tianqi,Meng Tingting,et al.Synthesis of polyether modified silicone defoamer and its application in emulsion[J].Coatings Industry,2016,46(9):58-64.
[5]Li Fangqian,Tang Yao,Zhuang Ke,et al.Preparation and performance evaluation of polyether-modified silicone defoamer[J].Applied Chemicals,2017,46(9):1695-1699.
[6]Wang Min,Guo Rui,Zhang Kaifeng,et al.Synthesis and application of silicone defoamers[J].Fine Chemicals,2017,34(3):274-278,306.
[7]Sun Nana.Synthesis and properties of fluoropolyether silicone defoamer[D].Xi’an:Xi’an University of Science and Technology,2012:7-38.
[8]Kobayashi H,Owen M J.Sarface tension of poly(1H,1H,2H,2H-heptadedeca-fluorodecy)methylsiloxanes[J].Die Makromolekulare Chemie,1993,194(1):259-267.
[9]Wu Fei,Cao Zhiping,Cai Chu.Synthesis and antifoam performance of silicone-polyether modified with 3,3,3-trifiuoropropyl group[J].Petrochemical Technology,2007,36:1033-1036.
[10]Krafft M P,Riess J G.Per-and polyfluorinated substances(PFASs):Environmntal challenges[J].Curr.Opin.Colloid Interface Sci.,2015,20(3):192-212.
[11]Guo Rui,Yang Jiangyue,Yan Wenjie.Preparation and characterization of long chain alkyl-modified phenyl hydrogenated silicone oils[J].Petrochemical Industry,2016,45(5):570-575.
[12]Yin Danna,Zheng Cheng,Zhang Liping,et al.Synthesis and characterization of polyether-modified trisiloxane surfactants[J].CIESC Journal,2010,61(6):1565-1570.
[13]Jiang Baoheng,Yang Jin.Study on the preparation and stability of high alcohol alcohol defoamer[J].Paper and Paper Making,2014,33(4):29-32.