| The main component of the optical fiber preform waste is nano porous silica powder,there are organic and inorganic flocculants on its surface.At present,landfill is the main way to deal with the optical fiber preform waste,which not only pollutes the environment,but also wastes a lot of resources.Nano silica powder has a certain rigidity,which can improve the bulk strength of organic polymers and increase the adhesive strength of emulsion adhesive after the formation of its film.In this paper,two kinds of the optical fiber preform waste with different surface electrical properties were introduced into the polymerization process,and the composite emulsion was prepared by in-situ emulsion polymerization.The stability and the adhesive strength of the two kinds of the composite emulsions were compared,and the suitable waste materials for preparing composite emulsion were found out the appropriate optical fiber preform waste powder was selected to prepare composite emulsion.Its best formula and process were explored,then the composite emulsion was blended with styrene butadiene emulsion,silicone acrylic emulsion and styrene acrylic emulsion to prepare the ceramic tile back glue,so as to realize the resource utilization of waste materials.First,the positively charged yellow optical fiber preform waste and the negatively charged red optical fiber preform waste are added to the polymerization system,and the composite emulsion is prepared by in-situ polymerization.The effect of the two kinds of optical fiber preform waste with different surface composition on the adhesive strength of acrylic emulsion was studied,and the appropriate optical fiber preform waste was selected to prepare the composite emulsion.It was found in the study that: in the emulsion polymerization system using anionic initiators and anionic emulsifiers,the adhesive strength and the stability of the composite emulsion formed by the positively charged yellow optical fiber preform waste is better than the emulsion formed by the negatively charged red optical fiber preform waste.The yellow optical fiber preform waste can improve the performance of the emulsion,and it is a more suitable inorganic powder.Then,the formulation and process of the yellow optical fiber preform waste composite emulsion were optimized,and the effects of the amount of water added,the amount of the yellow optical fiber preform waste and reaction temperature on the adhesive strength of the composite emulsion after film formation were explored,and the optimal formulation and process were found out.The results showed that: under the conditions of 3 g sodium dodecylbenzene sulfonate,3 g hydroxyethyl acrylate,0.08 g n-dodecyl mercaptan and 0.05 g anhydrous sodium carbonate,the total mass of monomer was fixed at 55 g,the amount of water in the bottom of the pot was 64%(percentage relative to the total mass of monomer,the same below),the amount of waste powder was0.18%,the amount of initiator was 1.45%,and the amount of MMA was 12.73%,the amount of BA was 81.82%,the reaction temperature was 95 ℃,The dropping time of monomer pre-emulsion was 50 min,and the holding time was 10 min,the adhesive strength of the composite emulsion reached the maximum value(0.49 MPa).Finally,the waste composite emulsion of the optimal formula and process was blended with styrene-butadiene emulsion,silicone-acrylic emulsion,and styrene-acrylic emulsion respectively,to prepare ceramic tile back glue,the optimal content of the waste composite emulsion(percentage relative to the mass of ceramic tile back glue)was 70%,50%,50% respectively.Under this amount,the adhesive strength of the three different ceramic tile back glue reaches the maximum,the adhesive strength reached 1.05 MPa,1.08 MPa,and 1.03 MPa respectively,all exceed the industry standard(T/SDDA0001-2018),the waste composite emulsion can effectively enhance the adhesive strength of ceramic tile back glue. |
PDF Full Text Request