335-64-8Relevant articles and documents
van Dyke Tiers
, p. 2038 (1964)
Synthesis and characterization of a novel fluorine-containing polymer emulsion with core/shell structure
Gao, Jinzhang,Wang, Xuemei,Wei, Yunxia,Yang, Wu
, p. 282 - 286 (2006)
A novel fluorine-containing polymer emulsion 4 with core/shell structure was synthesized in water phase by a two-stage emulsion polymerization technique using monomer 3 (i.e., 2-methacryloyloxyethyl perfluorooctanoate (MAEF)) reacting with the monomers such as butyl acrylate (BA), acrylic acid (AA) and styrene (ST). The monomer 3 was synthesized from the intermediate 2 (pentadecafluoro-octanoyl chloride) reacting with β-hydroxyethyl methacrylate (HEMA). Polymer film were prepared by coating emulsion 4 directly on a cleaned glass plate and allowed to dry at room temperature. Moreover, the characteristics of polymer film such as hydrophobicity, chemical resistance, surface composition, thermal stability, emulsion particle morphology, as well as the film-forming property were also studied.
Perfluoropolyether ester derivative as well as preparation method and application thereof
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Paragraph 0041-0046, (2020/06/20)
The invention discloses a perfluoropolyether ester derivative as well as a preparation method and application thereof. The preparation method of the perfluoropolyether ester derivative comprises the following steps: (1) performing acyl chlorination on pentafluorobenzoic acid to obtain pentafluorobenzoyl chloride; and (2) carrying out an esterification reaction on the pentafluorobenzoyl chloride and perfluoropolyether alcohol to obtain the perfluoropolyether ester derivative. In perfluoropolyether derivative molecules provided by the invention, a perfluoropolyether part provides compatibility with perfluoropolyether, and an ester group and a pentafluorophenyl part provide enhanced lubricity and bearing capacity; a large number of fluorine atoms contained in molecules can better generate friction chemical reaction with the metal surface, so that a film structure is easily formed on the surface of a friction pair, and the lubricating effect is promoted. The perfluoropolyether derivative also has good thermal stability and can still keep a certain lubricating effect at 150 DEG C. The perfluoropolyether ester derivative has good antifriction and antiwear properties when used as a lubricating grease additive.
A method of preparing liquid carbon dioxide thickening agent (by machine translation)
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Paragraph 0020; 0021; 0029; 0030; 0038; 0039, (2019/10/22)
The invention relates to a method for conventional oil and gas reservoir development of thickening agent preparation method of liquid carbon dioxide. It can solve the conventional mining method to the problem of oil-gas reservoir damage, the technical proposal: first to the bottle adding toluene and water, then adding serinol, in 0 °C [...] carbon acid tert-butyl ester, in the 25 °C reaction 4 hours, the distillation get intermediate (1), in the other a bottle after adding perfluroalkyl octoate, in 75 °C by adding thionyl chloride and N, N - dimethyl formamide, reaction 2 hours, distillation get intermediate (2); then in another bottle into the intermediate product in (1), raising the temperature to 75 °C dropping intermediate product (2), in the 75 °C reaction 12 hours to make the intermediate product (3); the final in a bottle by adding methylene chloride and trifluoroacetic acid, then adding the intermediate product (3), in the 25 °C reaction 2 hours, extraction after vacuum drying, adding 1, 6 - has been diisocyanate reaction 2 min to obtain the final product. The thickening agent can increase the viscosity of the carbon dioxide, can be used for fracturing. (by machine translation)
PH-responsive superomniphobic nanoparticles as versatile candidates for encapsulating adhesive liquid marbles
Chandan,Ramakrishna,Sunitha,Chandran, M. Satheesh,Kumar, K. S. Santhosh,Mathew, Dona
, p. 22813 - 22823 (2017/11/14)
Conventional adhesives are rarely used in sophisticated applications such as micro-fluidic devices or 'operations of bonding from a distance' due to their permanent wetting characteristics. Liquid marbles offer exceptional switching between non-wetting and wetting on demand. In this contribution, we present a novel approach to encapsulate both hydrophilic (epoxy resin) and hydrophobic (siloxane polymer) liquids via wrapping them with superomniphobic nanoparticles. The free energy for marble formation is lower for a hydrophobic liquid (0.931 × 10-16 J), whereas a hydrophilic liquid registers a higher value of 1.86 × 10-16 J. The mechanical bursting energy for hydrophobic marbles (20 μJ) is lower than that for their hydrophilic counterpart (48.6 μJ). The static friction coefficients of epoxy-based liquid marble are between 0.015 and 0.020 on glass, aluminium and stainless steel substrates. As a highlight, the nanoparticle coating is responsive to pH, and the bursting time of the liquid marbles can be tuned from 1 minute to several hours. It is demonstrated that the adhesive strength of cross-linked epoxy obtained by a liquid marble route is higher than that obtained vis-a-vis a conventional wetting route. The liquid marbles presented in this work can be ruptured by changing the pH, have a lower friction coefficient compared to the bare liquids (more rolling distance, which is highly essential for bonding of an intricate space from a distance) and are useful as dry adhesives.
