Preparation method of high-interfacial-bond-strength jute-polylactic acid composite material

Abstract

The invention discloses a preparation method of a high-interfacial-bond-strength jute-polylactic acid composite material. The method is characterized by comprising the steps of pretreatment, silicon dioxide sol treatment, hydrolytic treatment, and preparation of the modified jute fiber-polylactic acid composite material. The fiber pretreatment can remove the non-cellulosic substances, so that grooves are generated on the fiber surface, thereby being beneficial to generating mechanical anchoring actions in the reinforced composite material preparation process; and the pretreatment can endow the fibers with uniform color. By performing the silicon dioxide sol treatment and hydrolytic treatment, a coarse structure can be formed on the fiber surface, thereby further enhancing the mechanical anchoring actions of polylactic acid on the fiber surface. The method has the advantages of simple technique and controllable conditions; and the prepared composite material has the advantages of favorable compatibility between jute fibers and polylactic acid, high interfacial bond strength, obvious reinforcement effects and lower cost.

Description

Technical field: [0001] The invention belongs to the field of composite material manufacturing, and in particular relates to a preparation method of jute polylactic acid composite material with high interfacial bonding strength. Background technique: [0002] Fiber-reinforced composite materials are widely used in aerospace, national defense, transportation, sports and other fields due to their excellent properties such as small specific gravity, high specific strength and high specific modulus. In recent years, with the continuous improvement of people's awareness of environmental protection and the depletion of petrochemical resources, the disadvantages of traditional artificial fiber (such as glass fiber, aramid and carbon fiber, etc.) reinforced composite materials that use petrochemical resources as raw materials have become increasingly apparent. Plant fiber is a biodegradable renewable resource, which is gradually replacing man-made fiber as the main reinforcement mat...

AI Technical Summary

Problems solved by technology

So far, researchers have used physical methods (such as heat treatment, plasma treatment, etc.) and chemical methods (such as alkali treatment, acetylation treatment, surface grafting, interface coupling, etc.) to modify the fiber surface, which has improved to a certain extent. Compatibility between fiber and resin, but the results show that a single surface hydrophobic modification has certain limitations on the improvement of interfacial bond strength

Images