Continuous chaotic 3D printing for multilayered polymeric materials with tunable barrier and mechanical properties

Overview

This solution offers a novel continuous chaotic 3D printing technology for fabricating multilayered polymeric materials with tunable barrier and mechanical properties. The approach enables high-throughput, cost-effective production of filaments and textile mats with precisely engineered internal microstructures, ranging from 2 to 128 distinct inner layers. By rationally selecting layer compositions, manufacturers can tailor moisture and vapor barrier performance as well as mechanical strength to suit specific application requirements. The technology is positioned for adaptation to packaging materials for dry goods, while also serving biomedical and textile manufacturing needs.

Technical specifications

Key features:

• Continuous chaotic 3D printing produces filaments approximately 1 mm in diameter with intercalated inner layers as thin as 10 μm
• Scalable layer architecture supports 2, 4, 8, 16, 32, 64, and 128 inner layers of distinct materials
• High-throughput output: several meters of fiber produced in just a few minutes
• When integrated with electrospinning, dimensions can be scaled down by three orders of magnitude to produce nanostructured textile mats
• Compatible with diverse material systems, including cell-laden hydrogels and filler-laden thermoplastics such as polyethylene loaded with natural fibers or clays
• Layer composition can be rationally tuned to optimize barrier and mechanical properties

Technology readiness level

The technology has been experimentally validated for bioprinting cell-laden constructs and for fabricating electrospun mats with inner nanolayered structures. Hydrogel filaments with up to 128 layers have been successfully produced and characterized. Future work will adapt the platform to operate with thermoplastics for packaging applications, including characterization of architecture, barrier performance, mechanical strength, and thermal properties. The method is ready for materials adaptation and pilot-scale validation toward packaging and industrial manufacturing use cases.