合成了新型的氟化磺酸盐表面活性剂,其中全氟烷基链被醚氧(–O–)或亚甲基(–CH 2 –)单元中断。这两类分子都涉及多步合成。氟醚磺酸盐(RfOCF 2 CF 2 CH 2 CH 2 SO 3 H,Rf = C 2 F 5,C 3 F 7)通过四个步骤实现,包括全氟乙烯基醚的氟碘化(RfCF = CF 2),乙基化,氯化和水解。亚甲基间断氟磺酸盐(RfCH 2 CF 2 CH 2还分四个步骤制备CH 2 SO 3 H,Rf = C 4 F 9,C 6 F 13),包括氟代烷基碘的偏二氟乙烯插入,乙烯插入,氯化和水解。所有中间体和最终产物均通过1 H和19 F NMR进行了很好的表征。将这些新型氟化表面活性剂与市售氟磺酸盐(C 6 F 13 CH 2 CH 2 SO 3H)表面活性。这些材料与市售含氟表面活性剂的表面张力相匹配,但由于它们的氟含量较低而更加有效。
合成了新型的氟化磺酸盐表面活性剂,其中全氟烷基链被醚氧(–O–)或亚甲基(–CH 2 –)单元中断。这两类分子都涉及多步合成。氟醚磺酸盐(RfOCF 2 CF 2 CH 2 CH 2 SO 3 H,Rf = C 2 F 5,C 3 F 7)通过四个步骤实现,包括全氟乙烯基醚的氟碘化(RfCF = CF 2),乙基化,氯化和水解。亚甲基间断氟磺酸盐(RfCH 2 CF 2 CH 2还分四个步骤制备CH 2 SO 3 H,Rf = C 4 F 9,C 6 F 13),包括氟代烷基碘的偏二氟乙烯插入,乙烯插入,氯化和水解。所有中间体和最终产物均通过1 H和19 F NMR进行了很好的表征。将这些新型氟化表面活性剂与市售氟磺酸盐(C 6 F 13 CH 2 CH 2 SO 3H)表面活性。这些材料与市售含氟表面活性剂的表面张力相匹配,但由于它们的氟含量较低而更加有效。
New classes of partially fluorinated cationic surfactants, including pyridinium sulfonates and ammonium hydrochlorides have been prepared in which a fluoroalkyl chain is interrupted either by ether oxygen (O), or by methylene (CH2) units. These surfactants are obtained from multi-step syntheses via intermediate fluoroalkyl ethylene iodides (RfO(CF2CF2)nCH2CH2I, Rf = C3F7, C2F5, n = 1–3 or Rf(CH2CF2)m(CH2CH2)n
已经制备了新型的部分氟化的阳离子表面活性剂,包括磺酸吡啶鎓盐和铵盐酸盐,其中氟烷基链被醚氧(O )或亚甲基(CH 2)单元中断。这些表面活性剂是通过中间体氟代烷基碘乙烷(RfO(CF 2 CF 2)n CH 2 CH 2 I,Rf = C 3 F 7, C 2 F 5, n = 1-3或Rf(CH 2 CF 2)m(CH 2 CH 2)n,Rf = C 4 F 9,C 6 F 13m = 0–2,n = 1-2)或氟代烷基碘(RfI,Rf = C 3 F 7 O(CF 2 CF 2)3 I,C 6 F 13)。检查了这些氟化阳离子表面活性剂的表面活性,并与在油田应用中用作添加剂的市售氟化阳离子表面活性剂进行了比较。一些实施例显示出相对于对照物良好的性能,但是具有更高的氟效率,因为它们比全氟烷基类似物具有更低的氟含量。对于盐酸铵,还研究了阳离子与包括乙烯,丁烯和亚异丙基的氟化链之间不同间隔基团对表面活性的影响。
A compound of Formula (I), wherein Ra is linear or branched F(CF2)n(CH2CF2)m-, or linear or branched F(CF2)o interrupted by 1 to 6 catenary oxygen atoms, each oxygen bonded to two carbon atoms, m is 1 to 4, n is 2 to 6, o is 2 to 7, A is O or (CH2)k-COO, R1 is hydrogen or a methyl, R2 and R3 are each independently alkyl having 1 to 6 carbon atoms, and p, q and k are each independently integers from 1 to 10, which is suitable for use as a surfactant and in fire fighting formulations.
A fluorinated pyridinium cationic compound of formula (I)
wherein,
Rf is F(CF
2
)
6
(CH
2
CF
2
)
m
(CH
2
CH
2
)
n
—,
m and n are each independently integers of 1 to 3, and
R is H, C
1
to C
5
linear or branched alkyl, or C
1
to C
5
linear or branched alkoxy, having surfactant properties for lowering surface tension in an aqueous medium or solvent medium, and for use as a foaming agent.
Synthesis and repellent properties of vinylidene fluoride-containing polyacrylates
作者:Ji-Qing Huang、Wei-Dong Meng、Feng-Ling Qing
DOI:10.1016/j.jfluchem.2007.08.005
日期:2007.12
Fluorinated polyacrylats with side group containing vinylidene fluoride (VDF) units (CF3(CF2)(n) (CH2CF2)(m), n = 3, 5; m = 1, 2) were successfully synthesized. The water and oil repellency properties of these polymers are similar to those of fluorinated polyacrylate with side group containing long perfluorooctyl group (CF3(CF2)(7)I. The thermal telomerization of CF3(CF2)(5)I and CF3(CF2)(3)I with vinylidene fluoride (VDF) provided CF3(CF2)(5)CH2CF2I (1b) and CF3(CF2)(3)CH2CF2CH2CF2I (1c), respectively. The addition of 1b with ethylene followed by hydrolysis gave CF3(CF2)(5)CH2CF2CH2CH2OH (2b). Treatment of le with ethyl vinyl ether in the presence of Na2S2O4 followed by reduction produced CF3(CF2)(3)CH2CF2CH2CF2CH2CH2OH (2c). Fluoroacrylates 3b-d were prepared by acrylation of the corresponding fluoroalcohols 2b-d. The semi-continuous process emulsion co-polymerization of 3a-d with octadecyl acrylate and 2-hydroxylethyl acrylate initiated by (NH4)(2)S2O8 in the presence of a mixture emulsifiers of polyoxyethylene(10)nonyl phenyl ether (TX-10) and sodium lauryl sulfate provided stable latexes 4a-d, respectively. The water and oil repellency properties of 4b (R-f: CF3(CF2)(5)CH2CF2) and 4c (R-f: CF3(CF2)(3)CH2CF2CH2CF2) containing vinylidene fluoride (VDF) units were similar to those of 4a (R-f: CF3(CF2)(7)) containing long perfluoroalkyl group and much better than those of polymer 4d (Rf: CF3(CF2)(3)) with short perfluoroalkyl chain. Thus, polyacrylates containing vinylidene fluoride units showed promising aspects as the alternatives to the currently used water and oil repellent agents with long perfluoroalkyl chains. (C) 2007 Elsevier B.V. All rights reserved.