Application And In-situ Enhancement Of 3D Printing Vegetable Oil-based Photosensitive Resin

Soybean oil provides a wide range of benefits,including a wide range of sources,low cost and easy availability,a large number of modification sites,and great biodegradability.Because of backward processing techniques,poor comprehensive utilization,and a scarcity of high-value-added commodities,the bulk of soybean oil is currently edible,and its industrial application is still in its early stages.As a result,the primary goal of soybean oil resource utilization is to discover novel soybean oil-based products,expand their application sectors,and increase their added value.In response to the request,this study utilized soybean oil-based polyols（SBOP-1,SBOP-2）as raw materials to generate photocurable soybean oil-based photosensitive resins,as well as choline chloride（Ch Cl）and acrylic acid（AA）as raw materials to create a photocurable deep eutectic solvent（AA/Ch Cl）.Combining the formula design of soybean oil oligomer,AA/Ch Cl,and reactive diluent with the liquid crystal display（LCD）3D printing molding technology resulted in a complex structure flexible packaging material with persistent antistatic properties.Second,due to the molecular structural constraints of photosensitive resins derived from soybean oil,most soybean oil-based products lack optimal mechanical strength.As the main resin,a photosensitive resin based on soybean oil has been used,and it was molded into a 3D printing resin formula to improve its mechanical properties.By introducing tetraethyl orthosilicate（TEOS）to engage in 3D printing and molding,the final 3D printed soybean oil-based hybrid material was generated utilizing in-situ sol-gel technology,which exhibits improved mechanical strength.Finally,a soybean oil-based hybrid material with enhanced mechanical strength is created by using a photoacid generator（PAG）in 3D printing,where the photolytic acid generation provides the acidic catalytic conditions required for sol-gel.This paper’s primary research contents are as follows:（1）SBODA,a photocurable difunctional soybean oil oligomer,was synthesized by SBOP-1 and the half-esterified product IPDI-HEA as basic materials.Ch Cl and AA were used to create photocurable AA/Ch Cl.After formula synthesis,the viscosity,photocuring kinetics,critical exposure,and transmission depth of five 3D printing resins were investigated in this study.The best photoinitiator and dosage are 2 wt.% TPO-L,with a conversion rate of up to 88.5%.This paper explored the effects of AA/Ch Cl concentration on the thermal stability,antistatic properties,and mechanical strength of printed components.This article researched at the printing accuracy of 3D printing resin.According to the findings,the 3D printing resin has exceptional printing accuracy and can meet the vast majority of criteria for antistatic flexible packaging materials with complex geometries.（2）The photocurable 2.7-functional soybean oil photosensitive resin SBO-2.7A’s basic materials were 2.7-functionality soybean oil-based polyol（SBOP-2）and ethyl methacrylate（MOI）.The structure of SBO-2.7A was investigated through FT-IR,while formula design was employed to explore the viscosity,photocuring kinetics,critical exposure,and transmission depth of three 3D printing resins.The results show that the viscosities of the three 3D printing resins are appropriate for on-machine printing.The three 3D printing resins were cured after printing,and sol-gel treatment was done in a variety of post-treatment conditions.The sol-gel kinetics were investigated through ATR and SEM characterization,and the best sol-gel postprocessing parameters were discovered.The thermal stability,tensile properties,and dynamic thermomechanical testing of the 3D printed samples were performed after sol-gel posttreatment.The modulus has been strengthened,demonstrating great mechanical strength and a wide temperature range.A variety of sculptures were 3D printed by using matrix resin TEOS-15 %,which had the best overall performance.The study’s findings demonstrated that the 3D printing resin does indeed have a high printing accuracy.（3）PAG photolysis generates acid rather than acid vapor,which provides acidic catalytic conditions for in situ sol-gels.With rhodamine B ultraviolet spectrophotometry,the acidity of the sensitized PAG was evaluated,and the optimal amount of PAG was determined to be 3wt.% 204s-ITX.The viscosity,photocuring kinetics,critical exposure,and transmission depth of four 3D printing resins were investigated.The results indicate that the viscosities of the four3 D printing resins all meet the requirements for on-machine printing.Four distinct types of3 D printing resins were cured after printing,and sol-gel treatment was conducted at 80 °C under varied post-treatment settings.In this research,the sol-gel dynamics were evaluated by SEM characterization.This research examined at the thermal stability,tensile properties,and dynamic thermomechanical assessments of 3D printed materials after sol-gel post-treatment.When TEOS was raised,the tensile properties and energy storage modulus of the material improved when compared to the initial SBOA0,demonstrating great mechanical strength and a broad temperature range.Mechanical strength has increased when compared to acid vapor catalyzed samples.A variety of sculptures were 3D printed with the matrix resin TEOS-15%-PAG,which had the greatest overall performance.The 3D printing resin showed significantly better printing accuracy,according to the data.