A kind of preparation method of glass fiber modified sizing agent
A technology of glass fiber and sizing agent, which is applied in the field of preparation of glass fiber modified sizing agent, which can solve the problems of unsatisfactory bonding effect between fiber and resin interface, and achieve the effect of improving bonding effect, easy operation and simple process
Active Publication Date: 2019-11-08
JIANGNAN UNIV
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Problems solved by technology
[0004] In order to solve the problem that the existing sizing agent has an unsatisfactory effect on the interfacial bonding between fibers and resins, the present invention provides a method for preparing a glass fiber sizing agent with a simple process. Coating the glass fiber sizing agent prepared by this clear method can make The mechanical properties of glass fiber are improved, and the bonding effect of glass fiber and resin interface is improved
Method used
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Embodiment 1
[0046] Prepare the glass fiber modified sizing by the following steps:
[0047] (1) Graft modification of silane coupling agent: Add allyl polyoxyethylene polyoxypropylene epoxy ether (AEPH) and silane coupling agent (KH550) into a three-necked flask at a molar ratio of 2:1, React for 3 hours at 80°C with a stirring speed of 500r / min, cool and stand still, use a separatory funnel to separate the modified silane coupling agent and wash it with acetone, and then rotate it through a rotary evaporator to obtain a modified silane coupling agent. joint agent.
[0048] (2) Nano SiO 2 Particle modification: the mass of 5g SiO 2 , 15g absolute ethanol and SiO 2Add 2%, 4%, 6%, and 8% of the mass of silane coupling agent into a three-necked flask, add 100mL of deionized water, and react at 85°C and a stirring speed of 500r / min for 3 to 5 hours. Centrifuged to obtain modified nano-SiO 2 Particles, the obtained product can be washed with a 75% ethanol solution by volume fraction, and ...
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Abstract
The invention discloses a preparation method of a glass fiber modified impregnating compound, and belongs to the technical field of fiber-reinforced composite materials. The preparation method comprises the following steps: performing graft modification by taking glass fiber as a silane coupling agent (KH550) in an impregnating compound; performing graft modification on silicon dioxide; preparingan impregnating compound emulsion. The preparation method is characterized in that the silane coupling agent in the impregnating compound is subjected to graft modification, and modified silicon dioxide is added, so that the prepared impregnating compound emulsion is uniform in particle size distribution which is less than 500 nm, and is smaller in surface tension which is about 16 mN / m. Moreover,the glass fiber coated with the impregnating compound is improved in mechanical performance, and the interface bonding firmness between the glass fiber and resin is enhanced. The method is simple inprocess, and can be conveniently applied to glass fiber-reinforced composite materials.
Description
technical field [0001] The invention relates to a preparation method of a glass fiber modified sizing agent, belonging to the technical field of fiber reinforced composite materials. Background technique [0002] Glass fiber sizing agent is a special surface treatment agent for glass fiber production. It can not only change the surface properties of glass fiber, meet the processing performance requirements of glass fiber precursors, but also promote the glass fiber reinforcement in composite materials. The combination with the polymer matrix is an important factor in determining the final performance of glass fiber reinforced composites. Wetting agents are usually composed of film-forming agents, coupling agents, antistatic agents, lubricants, moisturizing agents, etc., especially film-forming agents and coupling agents are the most critical. [0003] Some studies have used sizing agents containing different types of silane coupling agents to treat the surface of glass fi...
Claims
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IPC IPC(8): C08K9/04C08K9/06C08K9/02C08K7/14C08J5/08C03C25/47C03C25/40C03C25/42
CPCC03C25/40C03C25/42C03C25/47C08J5/08C08K7/14C08K9/02C08K9/04C08K9/06C08K9/08
Inventor 邓炳耀刘庆生李大伟徐煜东
Owner JIANGNAN UNIV