A kind of hyperbranched emulsifier and preparation method thereof
An emulsifier and catalyst technology, applied in fiber processing, textile and papermaking, carbon fiber and other directions, can solve the problems of poor stability and poor uniformity of water-based epoxy sizing agent, and achieve reduced particle size, good coating and dispersion, Improve wetting effect
Active Publication Date: 2020-06-09
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
[0007] For this reason, the problem to be solved by the present invention is to provide a kind of hyperbranched emulsifier and preparation method thereof, utilize long-chain polyhydric alcohol, polyfunctional modifier and epoxy compound to react under certain catalyst and temperature condition to obtain hyperbranched structure emulsifier, and use hyperbranched emulsifiers to solve the problems of poor stability and poor uniformity of existing water-based epoxy sizing agents
Method used
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Embodiment 1
[0028] In this embodiment, the hyperbranched emulsifier is composed of the following components: 100 g of polyethylene glycol 1000, 10 g of dimethylol propionic acid, 30 g of trimethylolpropane triglycidyl ether and 2 g of ammonium persulfate. In this example, the hyperbranched emulsifier obtained through the reaction is referred to as hyperbranched emulsifier A.
Embodiment 2
[0030] The difference between the hyperbranched emulsifier in the present embodiment and the hyperbranched emulsifier in the embodiment 1 is: the consumption of ammonium persulfate in the present embodiment is 4g. In this example, the hyperbranched emulsifier obtained through the reaction is referred to as hyperbranched emulsifier B.
Embodiment 3
[0032] The difference between the hyperbranched emulsifier in the present embodiment and the hyperbranched emulsifier in the embodiment 1 is: the consumption of ammonium persulfate in the present embodiment is 5g. In this example, the hyperbranched emulsifier obtained through the reaction is referred to as hyperbranched emulsifier C.
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The invention discloses a hyperbranched emulsifier and a preparation method thereof. The hyperbranched emulsifier is prepared from 100 parts by weight of a long-chain polyol, 10-50 parts by weight ofa polyfunctional modifier, 30-100 parts by weight of an epoxy compound and 2-5 parts by weight of a catalyst. Different from a traditional emulsifier, the emulsifier synthesized has a hyperbranched network structure, a main chain has good hydrophilicity to ensure the stretching of a polymer chain in water, and an end group of the modified emulsifier has epoxy or other polar groups to achieve goodcoating and dispersion of epoxy droplets. A large number of holes are formed in the hyperbranched structure of the emulsifier, and the addition in the epoxy resin can reduce the viscosity of a system,which is advantageous for reducing the particle size of an emulsion during the phase transformation to improve the wetting of a carbon fiber surface by a sizing agent.
Description
technical field [0001] The invention relates to the technical field of emulsifiers, in particular to a hyperbranched emulsifier and a preparation method thereof. Background technique [0002] Carbon fiber and its composite materials have many excellent properties and have been widely used in military and civilian fields. However, carbon fiber has a certain degree of brittleness, and it is easy to produce monofilament breakage and fluff during the production process. At the same time, due to high-temperature carbonization, it has few surface active groups, low polarity, and poor bonding with epoxy resin. Therefore, the surface treatment of carbon fiber must be carried out to improve its clustering and interfacial bonding force with epoxy resin, and improve the physical and mechanical properties of composite materials. At present, the surface treatment of carbon fiber mainly uses sizing agent for surface sizing. Since 1959, after the PAN carbon fiber was developed by the Osa...
Claims
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IPC IPC(8): D06M15/53D06M15/55C08G65/28C08J3/03D06M101/40
Inventor 叶俊李效玉贾晓龙邱藤
Owner BEIJING UNIV OF CHEM TECH