Machine learning-guided tuning of shape memory behavior in 4D-printed single-layer elastomer strip

Pankaj Kumar, Amritesh Kumar, Santosha Kumar Dwivedy, Subham Banerjee · Emerald · 2026

Machine learning-guided optimization of 4D-printed PU/Eudragit S100/MTZ elastomer strips enables strong mechanical performance and high shape recovery for pH-responsive, site-specific drug delivery.

High AI ConfidenceStrong SourceLaboratory ResearchReadiness Unknown

Plain English summary

This study presents a 4D printing approach that uses biocompatible blends of polyurethane (PU), Eudragit® S100, and the drug Metronidazole (MTZ). The printed material is designed to show shape-memory behavior and pH-responsive activation, leveraging Eudragit® S100. The authors use machine learning to model nonlinear relationships between printing parameters (nozzle temperature, raster angle, printing speed) and key outcomes such as ultimate tensile strength, shape-memory programming, and activation stages. Multiple ML methods are evaluated for predictive accuracy. Experimentally, the optimized material achieves a reported shape-recovery ratio of 89.43% and an ultimate tensile strength of 11.15 MPa. A 3D-printed capsule made under optimized conditions is reported to show excellent mechanical stability and shape-memory behavior, supporting its potential for targeted drug delivery in the gastrointestinal tract.

Why this matters

Integration of machine learning with 4D-printed PU/Eudragit® S100/MTZ composites to tune shape-memory behavior and connect it to pH-responsive pharmaceutical relevance for colonic drug delivery. The abstract reports experimental results and potential suitability, but provides no evidence of scale-up, regulatory validation, manufacturing readiness, or commercial deployment.

Key findings

  • ML models were used to predict UTS, shape-memory programming, and activation stages from printing parameters.
  • Optimized 4D-printed composite achieved a shape-recovery ratio of 89.43%.
  • Optimized material achieved an ultimate tensile strength (UTS) of 11.15 MPa.
  • A 3D-printed capsule fabricated under optimized conditions showed excellent mechanical stability and shape-memory behavior.
  • Eudragit® S100 pH-responsiveness was used to motivate pharmaceutical/site-specific drug delivery potential.

Limitations

The abstract does not specify long-term durability, in vivo performance, biocompatibility/toxicity results, drug release kinetics, or comparative benchmarks against non-ML or alternative formulations.

Publication

Publisher
Emerald
Publication date
February 10, 2026
Research type
Paper

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Method note: Summaries and ratings on this page are generated by AI from the abstract only. Read the original paper for full context. · Model: gpt-5.4-nano-2026-03-17