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Scientists use seaweed to create stronger 3D-printed building material

Adding a tiny amount of this to local clay and sand makes the mixture incredibly smooth for 3D printing, and the final structure remarkably strong

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3D-printed earth-fiber objects. PIC COURTESY/Dan Weill

3D-printed earth-fiber objects. PIC COURTESY/Dan Weill

Scientists have created a high-tech, 3D-printable building material using sodium alginate, the seaweed-derived biopolymer that makes ice-cream creamy and gives ‘popping boba’ its snap.

Adding a tiny amount of this to local clay and sand makes the mixture incredibly smooth for 3D printing, and the final structure remarkably strong. 

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