Fused Granular Fabrication of Biodegradable Lightweight Knee Orthoses: Printability of Poly(lactic Acid)/Poly(butylene Adipate-Co-Terephthalate)/Bamboo Fiber Composites.

Zixin Hu, Weiping Dong, Bin Wang, Zhenxiao Xu, Xiping Li, Sisi Wang, Peng Zhao

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Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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7 authors.

Zixin HuCollege of Engineering, Zhejiang Normal University, Jinhua 321004, China.

Weiping DongCollege of Engineering, Zhejiang Normal University, Jinhua 321004, China.

Bin WangCollege of Engineering, Zhejiang Normal University, Jinhua 321004, China.

Zhenxiao XuCollege of Engineering, Zhejiang Normal University, Jinhua 321004, China.ORCID 0009-0006-4006-3227

Xiping LiCollege of Engineering, Zhejiang Normal University, Jinhua 321004, China.

Sisi WangCollege of Engineering, Zhejiang Normal University, Jinhua 321004, China.

Peng ZhaoZhejiang Key Laboratory of Additive Manufacturing Technology and Equipment, School of Mechanical Engineering, Zhejiang University, Hangzhou 310058, China.ORCID 0000-0002-3815-1248

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Conventional knee orthoses (KOs) are fabricated from petroleum-based plastics and are difficult to recycle, while filament-based fused deposition modeling is limited by low deposition efficiency and weak interlayer strength for large load-bearing devices. Herein, the authors reported fused granular fabrication (FGF) of lightweight, biodegradable KOs from poly(lactic acid)/poly(butylene adipate-co-terephthalate)/bamboo fiber (PLA/PBAT/BF) composites. Composites with 2, 6, and 10 wt.% BF were melt-compounded using zinc acetate as a transesterification catalyst and directly granule-printed. Rheological and morphological analyses revealed that increasing BF loading raised melt viscosity and elasticity, albeit with local fiber aggregation. Tensile strength decreased from 37.0 to 26.0 MPa with fiber addition, whereas notched impact strength improved from 7.2 to 11.6 kJ/m

Indexed as

3D printingcompositesfused granular fabricationorthosespoly(lactic acid)

Identifiers

PMID42882719

DOI10.3390/ma19194221

PMCPMC13665954

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