How can you identify bio-based from FTIR?

Quick answer

bio-based is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.

Peak interpretation

Possible materials / groups

Spectrum logic

The logic here is evidence aggregation: repeated literature mentions of bio-based, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.

Real-world usage

This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.

Common mistakes

• Calling a material match too early because one famous peak is present.
• Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
• Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.

Verification advice

Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.

Literature behind this page

• confidence 2.8

  bio-based

  Synthesis of cyclic α-pinane carbonate – a potential monomer for bio-based polymers DOI: 10.1039/d1ra07943c
• confidence 2.8

  bio-based

  Citrus pectin films enriched with thinned young apple polyphenols for potential use as bio-based active packaging DOI: 10.1080/19476337.2019.1640798
• confidence 2.8

  bio-based

  Wong 等 - 2019 - Photo-activated self-healing bio-based polyurethan DOI: 10.1016/j.indcrop.2019.111613
• confidence 2.8

  bio-based

  Costa de Almeida 等 - 2021 - Development of a bio-based adhesive from Protium h DOI: 10.1590/0104-1428.10020
• confidence 2.8

  bio-based

  Sugar-derived bio-based resins as platforms for the development of multifunctional hybrids with potential application for stone conservation DOI: 10.1016/j.mtcomm.2022.103662
• confidence 2.8

  bio-based

  Multicomponent bio-based fatty acids system as phase change material for low temperature energy storage DOI: 10.1016/j.est.2021.102645
• confidence 2.8

  Bio-based

  Shibata 等 - 2013 - Bio-based thermosetting resins composed of cardano DOI: 10.1038/pj.2012.195;
• confidence 2.8

  bio-based

  Direction of theoretical and experimental investigation into the mechanism of n-HA/Si-PA-SC@Ag as a bio-based heterogeneous catalyst in the reduction reactions DOI: 10.1038/s41598-022-26200-3
• confidence 2.8

  bio-based

  Development of bio-based material from the Moringa oleifera and its bio-coagulation kinetic modeling–A sustainable approach to treat the wastewater DOI: 10.1016/j.heliyon.2022.e10447
• confidence 2.0

  bio-based

  Effects of NCO/OH Ratios on Bio-Based Polyurethane Film Properties Made from Acacia mangium Liquefied Wood DOI: 10.3390/polym15051154