The accessibility of renewable materials that are both sustainable and competitive is essential to accommodate the rapid growth in consumption of 3D printing materials. We have developed biobased photopolymer resins based on modified soybean oil for application in commercial stereolithography printers. First, soybean oil methacrylates with various functionalities were successfully synthesized from epoxidized soybean oil as an alternative to commercially available soybean oil acrylate. A library of photoresins was created by mixing up to 80% of the biobased (meth)acrylate oligomers with biobased diluents and a photoinitiator. The resin composition was optimized to achieve a maximum biobased content and a low viscosity. The manufactured parts demonstrated complete layer fusion and accurate print quality. Stiffness and toughness can be tuned by altering the chemical composition or the number of functional groups per oligomer. These biobased materials can be employed to reduce the environmental impact of additive manufacturing while being competitive with current fossil-based resins from commercial manufacturers.

中文翻译：

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基于豆油的基于生物油的甲基丙烯酸甲酯的光敏聚合物树脂

具有可持续性和竞争力的可再生材料的可访问性对于适应3D打印材料消费的快速增长至关重要。我们已经开发了基于改性大豆油的生物基光敏聚合物树脂，用于商业立体光刻打印机中。首先，由环氧化大豆油成功合成了具有各种功能的大豆油甲基丙烯酸酯，以替代市售大豆油丙烯酸酯。通过将多达80％的生物基（甲基）丙烯酸酯低聚物与生物基稀释剂和光引发剂混合，来创建光树脂库。优化树脂组合物以获得最大的生物基含量和低粘度。所制造的零件展示出完整的层熔合和准确的打印质量。刚度和韧性可以通过改变化学组成或每个低聚物的官能团数来调节。这些生物基材料可用于减少增材制造对环境的影响，同时与商业制造商提供的当前基于化石的树脂竞争。