The synthesis of N-LEA for the initial batch of crosslinker was done by recycling PLA following a literature procedure. DLP-printed structures consisting of different lactate ester inks with DME crosslinker were dried in a vacuum oven at 40 °C overnight. The polymer was cut up or ground into pieces small enough to allow stirring and placed into a flask equipped with a reflux condenser. After purging with nitrogen, ethanolamine was added in a 10:1 (wt) ratio. The mixture was heated to 150 °C while stirring for 18 h. After full dissolution of the structures was observed, the reaction was stopped, and excess ethanolamine was removed by vacuum distillation.