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On-demand manufacture of circular 3D-printable resins
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DOI：10.1039/D5FD00073D.png)
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Abstract
En 中文
Recent progress in circular 3D-printable photocurable resins that enable closed-loop recycling marks a significant step forward in reducing wasteful manufacturing methods and non-recyclable printed plastics. However; with 3D printing technologies shifting from prototyping to full-scale production; the demand for high-scale processes and easily tuneable resin compositions can benefit from the design of automated systems. Herein; we report on the on-demand preparation of a circular 3D-printable resin; achieved through a continuous flow approach. A supported enzyme (Lipase B from Candida antarctica) was used to promote a green esterification of the lipoic acid with biobased alcohols to prepare circular biobased photocurable resins. The supported enzyme was employed for the preparation of a packed bed reactor and was easily recycled and reused to achieve the continuous production of lipoate-based photocurable resins with tuneable composition. Lastly; the environmental impact of the developed on-demand manufacturing process was compared to the previously reported esterification protocols through life cycle assessment; showing the effectiveness of continuous enzymatic flow synthesis in enhancing environmental performance across multiple areas; from human health to ecosystem impact and resources.
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