Preparation And Application Of Ethyl Cyanoacrylate Based Adhesive

Ethyl cyanoacrylate is a material with high adhesive strength,rapid curing in a very short time and a certain degree of biocompatibility,which has a wide range of applications in high-end fields such as biology,medicine and new energy storage.However,traditional single ethyl cyanoacrylate adhesives suffer from high brittleness,low impact resistance,water resistance and bonding properties,which greatly limit their practical applications and scope.In addition,bone adhesive materials can avoid cartilage tissue damage and microbial infection compared to traditional riveted bone fixation methods,and have a wide application prospect in medical applications.In recent years,in order to solve the safety and environmental protection problems of traditional organic secondary electrochemical energy storage batteries,the development of aqueous secondary electrochemical energy storage batteries has been vigorously pursued,in which the aqueous electrode material binder has become one of the key materials and its performance directly determines its energy storage performance and service life,while the existing binders carboxymethyl cellulose（CMC）and water-based acrylates binders for aqueous system batteries still have the problems of low electrochemical structure stability and high ion transport resistance,which greatly limit the promotion of large area applications.To this end,this thesis uses ethyl cyanoacrylate（ECA）as a matrix,combined with organic/inorganic composite modifications,to optimise multifunctional properties such as bonding time,bond strength,biocompatibility and electrochemical stability,and to evaluate its performance for application in bone restorers and aqueous system electrode binders,with the following specific studies and results obtained:（1）ECA-based aqueous adhesives with fast bonding speed,high bonding strength and self-healing properties were produced by combining ECA as a base with chitosan（CST）and polyethylene glycol（PEG）through a simple physical blending technique.The results show that the PEG/CST/ECA binder has not only greater bond strength,but also better self-healing properties and better hydrophilicity than the conventional PVDF and CMC binders.of approximately 40.7°,80.7°and 56.9°respectively.These results are attributed to the synergistic chemical and physical bonding mechanism of PEG/CST/ECA,which distinguishes PVDF and CMC from conventional physical bonding mechanisms.（2）A home-made PEG/CST/ECA binder was combined with graphene nanosheets through a simple physical blending technique to produce a conductive binder as a binder for electrodes of aqueous secondary electrochemical energy storage batteries（supercapacitors and zinc ion batteries）and compared with PVDF-based electrodes and CMC-based electrodes.It was shown that the PEG/CST/ECA binder based electrodes or supercapacitors and zinc ion batteries possess greater specific capacity and electrochemical cycling stability compared to conventional PVDF and CMC binders.At 8.0 m A cm^-2,the specific capacitance of the film area of the electrodes based on PEG/CST/ECA,PVDF and CMC binders is approximately 335 m F cm^-2,216 m F cm^-2 and 115 m F cm^-2,respectively;the cycle retention rates of the electrodes based on PEG/CST/ECA,PVDF and CMC binders are approximately 82%,79%and 94%after2500 cycles,respectively.（3）A high-strength ultra-rapid healing bone adhesive was produced using a home-made PEG/CST/ECA binder as the base,combined with nano-silica through a simple physical blending technique.The results of the study showed that the adhesive could form a gel-like solid rapidly and was non-flowing within 90 s.Within 5 min,its bonding force was as high as2.0 Kfg,and after 120 min the bonding strength.In addition,the biocompatibility and bone repair properties were evaluated by SEM,FT-IR,XRD and fluorescence microscopy,and the results demonstrated the formation of hydroxyapatite after 48 h of immersion,indicating that the adhesive can promote bone growth and has strong biocompatibility and bone repair functions.immersion,indicating that the adhesive can promote bone growth and has strong biocompatibility.