Study background

Epoxy resin applies extensively at the domain such as spaceflight aviation and electronic circuit, like that its are tall combustibility is the barrier that its use extensively however. Pursuit does not have a tradition flame retardant element (like haloid, phosphor, nitrogen and silicon) epoxy resin is flame retardant the system is current research one of heat direction. In view of the charcoal layer feature with hard epoxy resin, introduce alone transfer metallic activator gifts very hard the perpendicular combustion with exceedingly good epoxy resin checks grade, how to optimize the directional character becoming charcoal of the activator of directional adjusting control of charcoal layer forward, the efficient anti-flammability that realizes epoxy resin still faces grim challenge.

Study content

The near future, advanced material academy Professor Wang Deyi uses Madrid of combination of Li Zhi of Chongqing traffic university's associate professor the catalysis with 2 luxuriant exceedingly good iron is characteristic, developed grand system of quantities to have 2 luxuriant iron and biology base β- annulus dextrin advocate object fire retardant (CD@Ferr) simple and easy method (graph 1(a) ) . The low temperature that the weak interaction of 2 luxuriant iron and lumen of β- annulus dextrin restrains 2 luxuriant iron volatilizes (make an appointment with 80 °C) effective defer the volatilization of 2 luxuriant iron temperature comes 150°C above, machine temperature under the solidify of epoxy resin (graph 1(b, c) ) . The CD@Ferr that adds 2 Wt% (iron holds an amount low to 0.008 Wt% ) adopt UL-94 V-0 form in epoxy resin, oxygen index is amounted to 28.3% , smoke total output decreases 20.3% (graph 1(d) ) . Bolt as a result of the weak hydrogen of β-CD and epoxy resin interaction, temperature of transition of epoxy resin vitrification increases 24 OC (graph 1(e) ) , tensile strength and rupture percentage elongation parts synchronism rose 30.4% and 85.8% (graph 1(f, g) ) .

Graph 1 (a) 2 luxuriant iron and biology base β- annulus dextrin advocate object fire retardant (CD@Ferr) process of equipment of grand system of quantities; (B) CD@Ferr heats up heavy temperature curve; (Atomic of the iron in the TGA-MS of C) CD@Ferr releases a process; Of epoxy resin and composite material (D) UL-94 grade and oxygen index, (E) trends is mechanical, (F) drawing function and (G) pounds function

Of the system flame retardant mechanism considers to indicate a share 2 luxuriant iron produce iron freedom radical participates in agglomeration photograph macromolecule freedom radical temper by dipping in water destroys, the compound of atomic class iron of generation is intense catalysis is firm / flexible combinative epoxy resin / the fragrant annulus of β- annulus dextrin changes charcoal. Meanwhile, the 2 luxuriant iron that release gas phase by translate into iron freedom radical temper by dipping in water destroys H·/HO· , the compound of atomic class iron of generation is farther catalysis the hot combustion process of the cigarette ash in gas phase, action of smoke of curb of play gas phase (graph 2) . Without the tradition flame retardant class catalysis developed double successive atom of the element polymer is efficient and flame retardant implement muti_function new method with synchronism.

Graph 2 2 luxuriant iron and β- annulus dextrin advocate object fire retardant (CD@Ferr) mechanism of catalysis of class of double successive atom

This job with “High-Efficient Fire-Safe Epoxy Enabled By Bio-baSed Atomic-Level Catalytic Engineering” is published in for the problem " Chemical Engineering Journal " on (Chemical Engineering Journal, 2023, 461: 141967) . Article the first author is Chongqing traffic university Master Jiang Linyun is unripe, newsletter writer is Li Zhi of Chongqing traffic university's associate professor and Madrid Wang Deyi teachs advanced material academy. This research receives national science fund appoint (22005042) , the project on face of Chongqing city science fund (Cstc2020jcyj-msxmX0885) teach with Chongqing city appoint young fund (KJQN201900741) wait aid financially. This job is one of newest progress of group near future about the relevant research with efficient flame retardant catalysis. The relevant early days of its group works, the essence that is like smoke of curb of gas phase of 2 luxuriant iron (Fire And Materials, 2018, 42: 286-295) cooperate with with 2 luxuriant iron oxide of Shuang Qing of synergism layer shape is flame retardant epoxy resin (Chemical Engineering Journal, 2019, 378: 122046) wait.

Article link: Https://www.sciencedirect.com/science/article/abs/pii/S1385894723006988