This materials study added small amounts of tungsten disulfide nanotubes to films of poly(L-lactic acid) and hydroxyapatite and measured structure, mechanical strength and thermal behavior. The composite films performed better mechanically than the polymer and hydroxyapatite alone. The work concerns implant and packaging materials, not tungsten exposure.
Key numbers
This paper reports no numerical findings relevant to tungsten exposure.
Methods (brief)
Films were cast and characterized by electron microscopy, X-ray diffraction, Raman and infrared spectroscopy, tensile testing, micro-hardness, nanoindentation and differential scanning calorimetry.
Evidence fitness
Off-topic for dietary exposure: the paper describes a polymer composite and does not support dietary exposure, migration or toxicity claims for tungsten.
Limitations
No migration, release or biological testing of tungsten was performed. Statements about nanotube non-toxicity are background claims, not tested here.
Related evidence
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