Non-solvent-induced Phase Inversion Material 3D Printing/3D Copying Forming Mechanism And Experimental Research

At present,most polymer products are processed by traditional injection molding,blow molding,rolling molding or fused deposition 3D printing processes.However,the above technologies are based on the principle of thermoplasticity of materials,so it is impossible to process the materials whose melting temperature is higher than the decomposition temperature and difficult to process the materials with higher melting temperature.Therefore,in order to make up for the common shortcoming existing in the current thermoplastic polymer 3D molding process,this research innovatively proposed a normal temperature molding technology,that is,non-solvent-induced phase inversion material 3D printing/3D copying forming technology.The forming principle of the technology is as follows:Using polymer solution as raw material,the non-solvent components of polymer were introduced into the polymer solution.The non-solvent induced polymer solution to undergo phase transformation reaction and then solidified to form three-dimensional products.This research analyzed the feasibility of using the principle of non-solvent-induced phase inversion to form 3D products from the theoretical level and it was pointed out that two technical bottlenecks must be overcome to realize the goal of this research are to explore the forming mechanism of non-solvent-induced phase inversion forming 3D products and to solve the problem of real-time curing of high fluidity polymer solution or slurry consumables in the process of 3D printing.The feasibility of forming 3D products based on the principle of non-solvent-induced phase inversion was successfully verified by 3D copying technology,and the forming mechanism of non-solvent-induced phase inversion forming 3D products and the optimal post-treatment process path of products were obtained through experimental exploration.On this basis,the influence of non-solvent-induced phase inversion process on the morphology,structure and properties of formed products and its regulation mechanism were studied,and the controllable form-controlled non-solvent-induced phase inversion 3D forming technology was obtained,which provided a theoretical basis for the practical application of this technology.Based on the non-solvent-induced phase inversion forming mechanism and the consumable properties of high fluidity polymer solutions,a non-solvent-induced phase inversion 3D printing system with constant humidity printing environment was innovatively designed and built to solve the problem that extrusion consumables are difficult to cure immediately.On the basis of the equipment construction,the printing consumables were modified to develop the non-solvent-induced phase inversion 3D printing process and the printing consumables of the equipment,and the influence of various printing parameters on the morphology and properties of 3D products was explored,so as to explore a new forming process for polymer 3D printing.Based on the research foundation of non-solvent-induced phaseinversion principle in the three-dimensional forming of polymer materials,this forming technology can be further extended to the three-dimensional forming manufacturing field of ceramics,conductive materials and catalysts,which greatly expands the material adaptation and application range of this technology.Because the morphology,structure and properties of the products can be adjusted flexibly by the non-solvent-induced phase inversion reaction,the products formed by this technology can show unique advantages in various application fields.In order to make the new forming technology proposed in this studyhave the characteristics of green and sustainable development,and facilitate the promotion and application of the new technology,the life cycle environmental impact of non-solvent-induced phase inversion 3D printing technology was analyzed,the environmental impact of each production process in the technology was analyzed,and the corresponding optimization strategy was put forward,which provided a theoretical basis for the technology in the actual production of energy saving and emission reduction.In summary,non-solvent-induced phase inversion 3D printing and 3D copying forming technology were innovatively proposed,and their forming mechanism,process,equipment system and application were studied.While successfully making up for the technical shortcomings of the traditional process,a brand new technical solution was provided for the field of 3D product forming.