The Preparation Mechanism And Experimental Study Of Betel Nut Cellulose Short Fiber Reinforced Natural Latex Composites

As a tropical plant,betel nut is rich in yield and widely distributed.There are a lot of plant fibers in betel nut nut,and a lot of betel nut fiber can be prepared by heat alkalization treatment,which has excellent mechanical properties.Natural rubber latex,as an emulsion of natural rubber,has excellent fluidity and film-forming properties,and possesses excellent mechanical properties of natural rubber.Betel nut cellulose short fiber reinforced natural rubber latex composites were prepared by combining natural rubber latex with betel nut cellulose short fiber.However,due to the short fiber and rubber only through the form of physical friction,the combination between the two ability is poor,but will reduce the composite properties.Therefore,the interface adhesion between staple fiber and rubber can be improved by modifying the surface of staple fiber,and the mechanical properties of the composite can be improved.In view of this situation,areca cellulose staple fibers with rough surface and large amount of polar groups were prepared by physical and chemical methods.Put forward at the same time will be short fibers by wet mixing into the rubber matrix,mixing adhesive made of cellulose short fiber containing betel nut,and by silane coupling agent and nano ZnO on the modified respectively,on the experimental platform for all kinds of formulation and process performance experiment,studies the influence factors of betel nut of cellulose short fiber/rubber composites.The mechanical properties,swelling properties,processing properties,dynamic mechanical properties and the status of staple fiber in rubber matrix were characterized by various instruments andequipment.The work accomplished in this paper is as follows:1.The preparation mechanism of betel nut cellulose short fiber,the modification mechanism of betel nut cellulose short fiber with silane coupling agent,the activation and enhancement mechanism of nano ZnO on the composite material were explored,and the influence factors on the properties of betel nut cellulose short fiber/natural latex composite material were theoretically analyzed.2.Through theoretical analysis,the influences of various factors on the properties of composite materials are explored:(1)By exploring the influence of staple fiber content on the properties of composite materials,it can be seen that with the increase of staple fiber content,the mechanical properties of NR/BCF composite materials first increase and then decrease,the Payne effect of rubber sample increases,the wet slip resistance increases,and the rolling resistance increases.(2)By exploring different silane coupling agent and add attachments to the NRL/BCF composite material properties,the influence of when to use Si-69 modification and when the adding amount was 1.5 phr,the optimum composite modification effect,compared with the unmodified composites tensile strength increased by 21.2%,and there is an obvious drop,Payne effect of composite material wet resistance and solvent resistance,rolling resistance of the composite material.(3)By exploring different nano ZnO and add attachments effect on the properties of composite materials,with the increase of nano ZnO was leaked,the mechanical properties of composite materials,crosslinking density,solvent resistance,aging resistance showed a trend of decrease after the first increase,nano ZnO and add attachments to 4 phr,the optimal composite material performance.(4)By exploring the Si-69 together with the nano ZnO modified effect on the properties of composite materials,the synergy of the modified composites compared with the unmodified composites tensile strength,tear strength and abrasion resistance performance are improved,Payne effect compared with the unmodified composites decrease,wet resistance,rolling resistance compared with silane coupling agent Si-69 modified composites appear obviously decrease.