# Melt-processed poly (vinyl alcohol)/corn starch/nanocellulose composites with improved mechanical properties.
> 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


## Abstract

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.

### Mechanism

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.

## Bibliographic

- **Authors**: Zhou P, Luo YX, Lv Z, Sun X, Tian Y, Zhang XQ
- **Journal**: Int J Biol Macromol
- **Year**: 2021 (2021-07-31)
- **PMID**: [34097954](https://pubmed.ncbi.nlm.nih.gov/34097954/)
- **DOI**: [10.1016/j.ijbiomac.2021.06.011](https://doi.org/10.1016/j.ijbiomac.2021.06.011)
- **Study type**: other
- **Delivery route**: not specified
- **Effect reported**: not assessed

## Delivery context

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).

## Safety notes

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:
- [Inhalation concentration and LFL / UFL](https://h2-papers.org/en/safety-notes/inhalation-concentration)
- [Consumer Affairs Agency accident cases](https://h2-papers.org/en/safety-notes/accident-cases)

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> **Cite as**: H2 Papers — PMID 34097954. https://h2-papers.org/en/papers/34097954
> **Source**: PubMed PMID [34097954](https://pubmed.ncbi.nlm.nih.gov/34097954/)