Preparation Of Soybean Oil-based Photosensitive Resin And The Application In Oil/water Separation

Water is an irreplaceable important resource,which is closely related to human survival and economic development.But various water oil pollution incidents occur frequently in recent years.As the main pollution source of water environment,the oil pollution in water will not only destroy our ecological environment,but also seriously affect our daily water safety.Soybean oil is regarded as a bio-based material with great application prospect because of its characteristic of high yield,wide range of sources and biodegradability.However,since the polymers made from vegetable oils that have flexible structures,it is mainly used in the field of coating,ink,and adhesive,etc,which has low requirement for the rigidity of materials at present.Many Scholars have paid highly attention to broaden the application of vegetable oil.Aiming at the above issues,taking soybean oil polyol as raw material,we put forward to prepare a light-curable soybean oil-based oligomer by a simple and mild method in this paper.Using the soybean oil-based oligomer as photosensitive resin,porous polymer materials with hydrophobic and oil-friendly were prepared by sacrificial salt template method and it was applied to the separation application of oil-water mixtures.At the same time,the home-made soybean oil oligomer was used as main component in3 D priting,and the separation network with superoleophilic and superhydrophobic properties was fabricated in combination with modified superhydrophobic surface.By combining the advantages of UV-curing technology and renewable capability of soybean Oil,we expanded the application of soybean oil oligomers to the separation of oil-water mixtures.The research contents and the main results are as follows:(1)Through the reaction between soybean oil polyol(SBOP)and ethyl methacrylate isocyanate(MOI),the photoactive vinyl grafted on the triglycerides chain of soybean oil polyol to produce a photocurable soybean oil oligomer(SBOA).The optimal reaction time of the reaction was explored,and the molecular structure of the product was analyzed by FT-IR and 1HNMR,and the thermal stability and photocuring dynamics of SBOA were also studied.In addition,three photosensitive soybean oil-based oligomers with different functionality were synthesized,and the differences in viscosity,tensile properties,thermal stability and dynamic thermal mechanical properties were compared.(2)The SBOA was used as raw material,and the different diameter salt particles as a pore-forming template,the soybean oil-based porous polymers were rapidly prepared by photocuring technology.We analyzed the effects of different size of particles and weight percentage content of doped salt particles on the density,micromorphology,porosity and surface wettability properties of porous materials.The compression performances of porous materials were also studied,and the related properties of porous materials in the field of oil-water separation were also studied in detail.The experimental results showed that the prepared soybean oil-based porous material not only had strong hydrophobic properties,but also showed an extremely fast absorption capacity for many oily substances,which could effectively achieve the separation of oil-water mixtures.(3)Using SBOA as key component of 3D printing photosensitive resin,we printed oil-water separation filter screen with fine structure.Polydopamineand and 1-dodecaptan were used to modify the surface of printed devices which successfully get superhydrophobic/superoleophilic functional surface.Through comparing the mechanical properties and printing accuracy of several printing formulations,we selected the optimal resin formula for 3D printing to prepare oil-water separation filter screen.We also explored the reinforcing modification of 3D printing resin by blending with hydrophobic nanosilica.The test results showed that the strength of nanosilica doped resin was improved and the original printing accuracy of the resin was not affected.XPS and SEM results were used to study the superhydrophobic morphology of the 3D printing filter screen.S elements appeared on the surface of the modified device,which indicated that the modification was successful.In addition,the application of modified devices in the separation of oil-water mixtures was also studied in this paper.