ポリビニルアルコール／トウモロコシデンプン／ナノセルロース複合材料の溶融加工による力学特性向上
This study describes the fabrication of biodegradable poly(vinyl alcohol) (PVA) composites reinforced with corn starch (CS) and cellulose nanofibrils (CNFs) via melt-processing. Regulation of the hydrogen bonding network within the composite system broadened the processing window substantially to 131.46 °C and enhanced thermoplasticity. Infrared and Raman spectroscopic analyses confirmed disruption of intra- and inter-molecular hydrogen bonds in PVA and the concurrent formation of new hydrogen bonds among PVA, CS, and CNFs. At loadings of 10 wt% CS and 10 wt% CNFs, the composites achieved a tensile strength of 28.19 MPa, a modulus of 1572.54 MPa, and an elongation at break of 10.72%. The approach offers a pathway for producing complex three-dimensional PVA articles by melt-processing and may be applicable to improving the mechanical performance of other biodegradable polymer systems.
During melt-processing, existing intra- and inter-molecular hydrogen bonds in PVA are disrupted, and new hydrogen bonds form among PVA, corn starch, and cellulose nanofibrils, thereby widening the processing window and improving mechanical properties.
The delivery route is not clearly identifiable from this paper. For hydrogen intake, inhalation is the most efficient route; inhalation, however, carries explosion risk (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/34097954