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BIOPOLYMER Intelligence

Overview / Routes / Cellulose, lignin, starch, protein & chitosan polymers

Modified natural polymers

Cellulose, lignin, starch, protein & chitosan polymers

Materials made by modifying polymers that nature already builds - shown by representative units only.

Scope: Cellulose esters, thermoplastic starch, lignin-based polymers, protein plastics, chitosan.

What it is

Klemm et al. describe cellulose as a linear homopolymer of D-glucose units with broad capacity for chemical modification, including cellulose esters and ethers.

Zhang et al. report that starch becomes thermoplastic with plasticisers, heat and shear; Verbeek and van den Berg describe how proteins are extruded into thermoplastics with plasticisers.

Upton and Kasko review polymers made from lignin, monolignols and lignin-derived chemicals such as vanillin.

Chemistry summary

Structures on this site show a representative repeat or model unit (glucopyranose, glucosamine, coniferyl alcohol, lysine). Natural polymers are never drawn as invented full structures.

representative unit

β-D-Glucopyranose

Representative unit of cellulose (β-1,4-linked D-glucose); not the polymer itself.

OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O

PubChem CID 64689 · source

representative unit

α-D-Glucopyranose

Representative unit of starch (α-linked D-glucose); not the polymer itself.

OC[C@H]1O[C@H](O)[C@H](O)[C@@H](O)[C@@H]1O

PubChem CID 79025 · source

representative unit

Coniferyl alcohol

Representative lignin monolignol (G unit); lignin itself has no single defined structure.

OC/C=C/c1ccc(O)c(OC)c1

PubChem CID 1549095 · source

representative unit

D-Glucosamine

Representative unit of chitosan (anomeric centre unspecified); not the polymer itself.

OC[C@H]1OC(O)[C@H](N)[C@@H](O)[C@@H]1O

PubChem CID 439213 · source

representative unit

L-Lysine

Representative amino acid for protein-based plastics; proteins are not drawn as full structures.

NCCCC[C@H](N)C(=O)O

PubChem CID 5962 · source

Drawn from SMILES with RDKit and verified against PubChem. Full structure library →

Synthesis and production

Esterification or etherification of cellulose; plasticisation of starch and proteins in extrusion; functionalisation of lignin.

Property profile

Zhang et al. report that most thermoplastic starch has a glass transition between about -75 and 10 °C and tensile strength typically below 6 MPa.

Sourced property table (ND where no value is quoted) →

End-of-life profile

Each attribute is recorded separately and never inferred from another.

Bio-based originBio-based backbone; additives and modifying reagents may not be.
BiodegradabilityGrade- and modification-specific; not assessed here.
CompostabilityNot assessed here.
RecyclabilityNot assessed here.

Key players

None listed. Organisations are named here only when a checked development or cited source names them.

Typical applications
films, coatings, moulded goods (as cited)

Open challenges

  • Moisture sensitivity of starch and protein materials.
  • Low tensile strength of thermoplastic starch.

Cross-cutting: Moisture & hydrolytic stability · Brittleness, impact & ageing · Feedstock availability, land use & variability

Quoted support for this page (4)
  • Formed by the repeated connection of D ‐glucose building blocks [Klemm 2005]
  • Starch exhibits usable thermoplastic properties when plasticizers, elevated temperatures, and shear are present. [Zhang 2014]
  • TPS has low tensile properties, typically below 6 MPa in tensile strength (TS). [Zhang 2014]
  • To avoid degradation, the required chain mobility is achieved by plasticizers. [Verbeek 2010]

Each quote is re-checked against the published abstract in CI.

Monthly track

October 2026 in progress · scanned through 2026-10-20

No checked developments.

Machine-triaged leads (18)
machine-triagedFormulation / application1 Oct 2026· ACS Macro Lettersjournal

Interplay between Thermal Denaturation and Dynamic Covalent Chemistry Generates High-Performance Recyclable Protein Plastics

Bovine serum albumin cross-linked with dynamic vinylogous urethane bonds and thermally denatured is reported to give recyclable protein plastics with tensile strengths up to 35 MPa.
“Cross-linking a priori brittle bovine serum albumin (BSA) with dynamic vinylogous urethane (VU) linkages produces robust plastics with tensile strengths of up to 35 MPa.” (abstract)
doi:10.1021/acsmacrolett.6c00434
machine-triagedFormulation / application2 Oct 2026· Food Packaging and Shelf Lifejournal

Effect of ethylene glycol-based plasticizers on the properties of zein-based biopolymers processed by extrusion and injection molding

Ethylene glycol plasticizers of differing chain length were used in zein biopolymers processed by extrusion and injection molding, tuning ductility, strength and hydrophobicity while retaining compostability.
“Ethylene glycol (1EG), diethylene glycol (2EG), triethylene glycol (3EG), and tetraethylene glycol (4EG) were introduced as plasticizers.” (abstract)
doi:10.1016/j.fpsl.2026.101856
machine-triagedNew route2 Oct 2026· Materials Today Communicationsjournal

Tailoring bacterial cellulose membranes via plastic-derived carbon sources: A structural and performance characterization

Komagataeibacter xylinus produced bacterial cellulose from lactic acid and terephthalic acid, including a mixed feed mimicking depolymerised PET/PLA waste, with carbon source controlling membrane properties.
“the first report of BC synthesis by K. xylinus from LA as sole carbon source under static cultivation” (abstract)
doi:10.1016/j.mtcomm.2026.116292
machine-triagedFormulation / application3 Oct 2026· ACS Omegajournal

Tailoring Thermoplastic Whey Protein with Polyethylene Glycol and Calcium Stearate: A Systematic Design of Experiments Investigation of Structure, Thermal Behavior, and Rheology

Thermoplastic whey protein isolate was modified with calcium stearate and PEG in a design-of-experiments study of structure, rheology and thermal behaviour; plasticization appeared incomplete.
“Tailoring Thermoplastic Whey Protein with Polyethylene Glycol and Calcium Stearate” (title)
doi:10.1021/acsomega.6c06950
machine-triagedFormulation / application4 Oct 2026· Cellulosejournal

Plasticizer compatibility with amorphous (low-ordered) cellulose and dialcohol cellulose

Molecular dynamics simulations and experiments compare eleven plasticizers in dialcohol and low-ordered cellulose, with glycerol and sorbitol showing the strongest plasticizing effects.
“Among the tested additives, glycerol and sorbitol showed the strongest plasticizing effects.” (abstract)
doi:10.1007/s10570-026-07240-8
machine-triagedFormulation / application5 Oct 2026· ACS Applied Polymer Materialsjournal

Bonding Properties and Antifungal and Flame-Retardant Performances of Soy Protein Adhesive Modified by Vanillin Grafting and Iron–Dopamine Synergy

A vanillin-derived trifunctional aldehyde with Fe@polydopamine crosslinks soy protein isolate adhesive, raising dry and wet shear strength versus pure SPI.
“the dry and wet shear strengths of the SPI-10TAM-5Fe@PDA adhesive reached 2.45 and 1.28 MPa” (abstract)
doi:10.1021/acsapm.6c02724
machine-triagedFormulation / applicationOct 2026· Carbohydrate Polymersjournaltitle only

Knoevenagel condensation for malonate-grafted dialdehyde cellulose: Tuning mechanical and swelling properties of poly(acrylic acid-co-itaconic acid) bio-SAPs

Malonate-grafted dialdehyde cellulose prepared by Knoevenagel condensation tunes mechanical and swelling properties of poly(acrylic acid-co-itaconic acid) bio-superabsorbents.
“Knoevenagel condensation for malonate-grafted dialdehyde cellulose” (title)
doi:10.1016/j.carbpol.2026.125651
machine-triagedFormulation / applicationOct 2026· Colloids and Surfaces A: Physicochemical and Engineering Aspectsjournaltitle only

Interfacial engineering of carbon nanotube-reinforced cellulose ester nanocomposites for enhanced mechanical performance, thermal energy storage, and electromagnetic attenuation

Carbon nanotube-reinforced cellulose ester nanocomposites are studied for mechanical performance, thermal energy storage, and electromagnetic attenuation.
“Interfacial engineering of carbon nanotube-reinforced cellulose ester nanocomposites” (title)
doi:10.1016/j.colsurfa.2026.140940
machine-triagedFormulation / application1 Oct 2026· International Journal of Innovative Science and Research Technology (IJISRT)journal

Dynamic Mechanical Analysis of Degradable Starch (Potato-Corn) - Clay Composite Polymer Films

Potato and corn starch films reinforced with montmorillonite clay were cast and characterised by dynamic mechanical analysis.
“biodegradable starch-clay composite films produced from potato and corn starches reinforced with montmorillonite clay” (abstract)
doi:10.38124/ijisrt/26sep825
machine-triagedFormulation / application1 Oct 2026· Polymersjournaltitle only

Preliminary Synthesis and Basic Performance Characterization of Bio-Based Composite Materials Using Starch and Gelatin as Representative Matrix Phases: Exploratory Conceptual Design for Sustainable Toy Scenarios

Exploratory work synthesizes and characterizes bio-based composite materials using starch and gelatin as representative matrix phases for sustainable toy scenarios.
“Bio-Based Composite Materials Using Starch and Gelatin as Representative Matrix Phases” (title)
machine-triagedFormulation / application14 Oct 2026· Environmental Quality Managementjournal

The Production, Characterization, and Biodegradation Kinetics of Bioplastics From Starch Extracted From Ipomoea batatas and Manihot esculenta Tubers

Starch from sweet potato and cassava tubers was reacted with ethanoic, methanoic and propanoic acids plus glycerol to form bioplastics, with mechanical properties and biodegradation kinetics reported.
“production of biodegradable bioplastics using starch extracted from Ipomoea batatas and Manihot esculenta tubers” (abstract)
doi:10.1002/tqem.70481

September 2026

No checked developments.

Machine-triaged leads (24)
machine-triagedFormulation / applicationSept 2026· Chemical Engineering Journaljournaltitle only

Synergistic plasticization and crosslinking via deep eutectic solvent and epoxidized soybean oil for high-performance lignocellulosic bioplastics from Ginkgo Biloba leaves

The title describes plasticization and crosslinking, using a deep eutectic solvent and epoxidized soybean oil, to make lignocellulosic bioplastics from Ginkgo biloba leaves.
“high-performance lignocellulosic bioplastics from Ginkgo Biloba leaves” (title)
doi:10.1016/j.cej.2026.179236
machine-triagedFormulation / application4 Sept 2026· ACS Polymers Aujournal

From Byproduct to Platform: Can Kraft Lignin Outcompete Lignosulfonates?

Perspective argues fractionated and functionalised kraft lignin could compete with lignosulfonates as dispersants, noting heterogeneity, process complexity, scalability and cost challenges.
“kraft lignin (KL) is produced at multimillion-tonne levels annually and is now being acknowledged as a renewable aromatic polymer” (abstract)
doi:10.1021/acspolymersau.6c00111
machine-triagedFormulation / application4 Sept 2026· Carbohydrate Polymer Technologies and Applicationsjournal

Development of active gellan gum/microfibrillated cellulose films as sustainable alternatives to plastics for primary food packaging

Gellan gum, glycerol and microfibrillated cellulose films with pomegranate peel extract were optimised and tested for food packaging, including dry foods.
“films based on gellan gum (GG), glycerol (Gly), and micro-fibrillated cellulose (C) were produced through a solvent casting approach” (abstract)
doi:10.1016/j.carpta.2026.101223
machine-triagedFormulation / application7 Sept 2026· Molecules (Basel, Switzerland)journal

Kombucha-Derived Bacterial Cellulose for Active and Biodegradable Food Packaging: Production, Modification, Performance, and Current Challenges.

Review examines kombucha-derived bacterial cellulose production, purification and modification for food packaging, noting moisture sensitivity and limited migration and pilot-scale data.
“Purified KBC provides a continuous nanofibrillar network and can exhibit good mechanical and oxygen-barrier properties under dry conditions” (abstract)
doi:10.3390/molecules31173131
machine-triagedFormulation / application30 Sept 2026· www.ctiweb.co.jpnewsJapanja

【100％植物由来・生分解性バイオプラ】日精樹脂工業、「LignoForm（リグノフォーム）」開発・販売開始 - www.ctiweb.co.jp

Nissei Plastic Industrial has developed and started selling LignoForm, described as a 100% plant-derived biodegradable bioplastic.
“【100％植物由来・生分解性バイオプラ】日精樹脂工業、「LignoForm（リグノフォーム）」開発・販売開始” (title)
machine-triagedFormulation / application1 Sept 2026· Macromolecular biosciencejournal

Lignin-Based Fluorescent Polymers: From Aggregation-Induced Emission Mechanism to Intelligent Bone Regeneration.

A review integrates lignin-based fluorescent polymers, describing aggregation-induced emission from phenylpropanoid clustering and proposed uses in scaffold tracing and bone regeneration.
“clustering of phenylpropanoid units transforms concentration quenching into a luminescent design advantage” (abstract)
doi:10.1002/mabi.70250
machine-triagedFormulation / applicationSept 2026· Applied Clay Sciencejournaltitle only

Transparent ultraviolet-protective moisture barrier films derived from clay mineral/mica and lignin––A plant-based aromatic polymer

The title describes transparent ultraviolet-protective moisture barrier films derived from clay mineral/mica and lignin, described as a plant-based aromatic polymer.
“Transparent ultraviolet-protective moisture barrier films derived from clay mineral/mica and lignin” (title)
doi:10.1016/j.clay.2026.108276
machine-triagedFormulation / application1 Sept 2026· Comprehensive reviews in food science and food safetyjournal

Shrimp Processing By-Product as Sustainable Resources for Biodegradable and Active Food Packaging Films: A Review.

Review covers extraction of chitin, protein and astaxanthin from shrimp processing waste and their use in biodegradable active food packaging films, noting scale-up barriers.
“shrimp-processing waste, including shells, heads, and tails, represents a particularly valuable biomass” (abstract)
doi:10.1111/1541-4337.70631
machine-triagedFormulation / application5 Sept 2026· Bioresource Technologyjournal

Low-carbon cork agglomerated materials via chitosan/blocked isocyanate adhesive: Cross-linking mechanism, high performance, and life cycle assessment

Chitosan crosslinked with blocked isocyanate served as a composite adhesive for cork agglomerated materials, with an LCA reporting lower environmental loads than commercial isocyanate adhesives.
“Chitosan (CS) as the raw material, Blocked Isocyanate (BI) as the efficient crosslinking agent” (abstract)
doi:10.1016/j.biortech.2026.135776
machine-triagedFormulation / application5 Sept 2026· Forestsjournal

Valorization of Oil Press Residues in Starch-Based Biocomposites for Sustainable Wood Substitution

Nigella, rapeseed and evening primrose oil press residues were tested as lignocellulosic fillers replacing wood in modified thermoplastic starch composites.
“replacing wood particles with nigella, rapeseed, and evening primrose pomace residues in modified thermoplastic starch (MS)-based composites” (abstract)
doi:10.3390/f17091061
machine-triagedFormulation / application7 Sept 2026· Smalljournal

Eco‐Friendly, Multifunctional Antibacterial Chitosan/Covalent Organic Framework Composite Films via Molecular Weaving for Fruit Preservation

A chitosan/TpPa-SO3H covalent organic framework composite film made by molecular weaving is reported to raise elongation at break and tensile strength and to extend fruit shelf life.
“Chitosan/TpPa‐SO 3 H film was formed through a molecular weaving strategy” (abstract)
doi:10.1002/smll.75642
machine-triagedFormulation / application17 Sept 2026· ACS Sustainable Chemistry & Engineeringjournal

Thermoplasticization of Bamboo Fibers via Solvent-Free Heterogeneous Esterification with Long-Chain Fatty Acids: Effect of Lignin Removal and Carbon Chain Length

Bamboo fibers were thermoplasticized by solvent-free heterogeneous esterification with C10–C18 fatty acids after controlled delignification, yielding hot-pressable, UV-blocking films.
“a solvent-free strategy was proposed to fabricate thermoplasticized bamboo fibers (TBF) via heterogeneous esterification” (abstract)
doi:10.1021/acssuschemeng.6c06380

References

  1. Klemm D., Heublein B., Fink H. et al. (2005). Cellulose: Fascinating Biopolymer and Sustainable Raw Material. Angewandte Chemie International Edition. doi:10.1002/anie.200460587 review
  2. Zhang Y., Rempel C., Liu Q. (2014). Thermoplastic Starch Processing and Characteristics—A Review. Critical Reviews in Food Science and Nutrition. doi:10.1080/10408398.2011.636156 review
  3. Verbeek C.J.R., van den Berg L.E. (2010). Extrusion Processing and Properties of Protein‐Based Thermoplastics. Macromolecular Materials and Engineering. doi:10.1002/mame.200900167 review
  4. Upton B.M., Kasko A.M. (2016). Strategies for the Conversion of Lignin to High-Value Polymeric Materials: Review and Perspective. Chemical Reviews. doi:10.1021/acs.chemrev.5b00345 review
  5. Rinaudo M. (2006). Chitin and chitosan: Properties and applications. Progress in Polymer Science. doi:10.1016/j.progpolymsci.2006.06.001 review
  6. Isikgor F.H., Becer C.R. (2015). Lignocellulosic biomass: a sustainable platform for the production of bio-based chemicals and polymers. Polymer Chemistry. doi:10.1039/c5py00263j review

Full literature list →