4Dresyn ETR35 Bio, Electro-Thermo-Responsive hydrogel 3D resin printable by SLA, DLP & LCD printing

Product description

4Dresyn® ETR35 Bio is an electro-thermo-responsive hydrogel photopolymer developed for SLA, DLP and LCD additive manufacturing, enabling reversible swelling and conductivity changes near physiological temperatures for advanced research applications.

Application framework

Designed for use in vat photopolymerization systems (SLA, DLP and LCD) within controlled professional and research environments. Suitable for smart hydrogel systems, soft bioelectronics, sensors and actuator research.

Important regulatory note

This material is intended for research and development use only. It is not a medical device, not a medicinal product and not approved for clinical use or human application. Functional performance, biocompatibility and electrical behavior must be independently validated for each application.

Typical applications

• Smart hydrogel biosensors
• Temperature-responsive impedance systems
• Soft bioelectronics and micro-actuators
• Research in electro-responsive materials
• Hydrogel-based functional prototypes

Measured / indicative material behavior

• Thermoresponsive transition: ~32–35 °C
• Reversible swelling/deswelling behavior near physiological temperature
• Conductivity dependent on hydration and formulation
• Swelling at 25 °C: high water uptake (tunable)
• Mechanical properties tunable via crosslink density and conductive phase
• Dimensional resolution: ~100 µm features demonstrated

Functional performance characteristics

• Thermoresponsive matrix with reversible swelling/deswelling
• Electrically conductive hydrogel system
• Tunable conductivity and impedance vs. temperature (wet state)
• Adjustable swelling via solids loading and post-processing
• Mechanical tuning via crosslink density and conductive phase
• High-resolution printing capability for microstructures
• Water-washable prints and vats
• Organo-tin free formulation
• Compatible with most professional SLA, DLP and LCD printers
• Print speed and resolution tunable with 3Dresyns Fine Tuners

Processing and handling performance

• Requires open-mode SLA, DLP or LCD printers
• Recommended for experienced users due to conductive system complexity
• Performance depends on printer power, exposure and setup

Processing guidelines (starting window)

• Wavelength: 390–410 nm
• Layer height: ~0.10 mm
• Exposure: ~30 seconds per layer
• Post-processing: water rinse → controlled drying → temperature conditioning → post-cure per IFU

Processing note

Conductive hydrogel systems require careful optimization of exposure parameters, formulation and environmental conditions. Electrical and swelling performance are strongly dependent on hydration state and processing workflow.

Storage & stability

• Shelf life: 6 months at <25 °C
• Extended shelf life when stored sealed at 4 °C
• Store protected from light and moisture
• Material supplied made-to-order (typical lead time: 3–4 weeks)

Testing & processing disclaimer

Material performance, including electrical conductivity, swelling behavior and mechanical response, depends on the complete material–printer–process–conditioning workflow. Full validation is required for each specific application.

Why choose 4Dresyn® ETR35 Bio

• Electro-thermo-responsive hydrogel for advanced research
• Reversible behavior near physiological temperatures
• Tunable conductivity and swelling properties
• Compatible with SLA, DLP and LCD technologies
• Suitable for smart materials and bioelectronics development

Regulatory & legal notice

This material is supplied as a professional research material and is not marketed as a finished product. It is not approved for clinical, pharmaceutical or therapeutic use. All regulatory responsibility remains with the user.

Document reference: TDS-ETR35-BIO-EN | Version: 1.0 | Last updated: March 2026