How can you identify kraft lignin from FTIR?
This page summarizes the recurring FTIR evidence reported for kraft lignin, including the most frequent peaks, supporting functional groups, and literature-backed interpretation patterns. It is a structured evidence page, not a claim of automatic single-spectrum certainty.
Backed by 13 cited sources
Quick answer
kraft lignin 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
| Functional group | Evidence |
|---|---|
| Hydroxyl (O-H) | 23 |
| Methacrylate | 21 |
| Acetate | 21 |
| Alkyl C-H | 19 |
| Methoxy (OCH3) | 14 |
| C-O single bond | 13 |
| Aromatic ring | 12 |
| Carboxyl (COOH) | 12 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of kraft lignin, 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
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confidence 0.9
Kraft lignin
Di Francesco 等 - 2022 - A New Family of Renewable Thermosets Kraft Lignin DOI: 10.1002/cssc.202200326 -
confidence 0.9
kraft lignin
Activation of Magnesium Lignosulfonate and Kraft Lignin: Influence on the Properties of Phenolic Resin-Based Composites for Potential Applications in Abrasive Materials DOI: 10.3390/ijms18061224 -
confidence 0.9
kraft lignin
Tang 和 Zhou - 2015 - The degradation of kraft lignin during hydrotherma DOI: 10.1515/pjct-2015-0045 -
confidence 0.8
kraft lignin
The Effect of Sample Preparation Techniques on Lignin Fourier Transform Infrared Spectroscopy DOI: 10.3390/polym15132901 -
confidence 0.8
kraft lignin
A comparative study on selective properties of Kraft lignin–natural rubber composites containing different plasticizers DOI: 10.1007/s13726-017-0534-0 -
confidence 0.8
Kraft lignin
Enzyme-Catalyzed Polymerization of Kraft Lignin from Eucalyptus globulus: Comparison of Bacterial and Fungal Laccases Efficacy DOI: 10.3390/polym15030513 -
confidence 0.8
Kraft lignin
Kolodynska 等 - 2016 - Development of New Effective Sorbents Based on Nan DOI: 10.1186/s11671-016-1371-3 -
confidence 0.8
kraft lignin
Lazzari 等 - 2019 - Kraft lignin and polyethylene terephthalate blends DOI: 10.1590/0104-1428.06618 -
confidence 0.8
kraft lignin
Effect of Lignin Modification on Properties of Kenaf Core Fiber Reinforced Poly(Butylene Succinate) Biocomposites DOI: 10.3390/ma12244043 -
confidence 0.8
kraft lignin
Vidal 等 - 2021 - Sulfomethylation of Radiata Pine Kraft Lignin and DOI: 10.1016/j.biotechadv.2016.10.001
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