International standards have the potential to remove trade barriers, harmonize research and development activities, and contribute to development of regulations by national and international bodies. As government, academic and industrial research and development organizations endeavor to understand and develop cellulose nanomaterial-based products for multiple industrial sectors, the need for international standards for cellulose nanomaterials is evident and growing. The Canadian Standards Association (CSA) Group and the International Organization for Standardization (ISO) are taking the lead in standards development efforts. ISO standard development activities are carried out within two technical committees: TC 6 - Paper, board and pulps (whose scope includes cellulose nanomaterials), and TC 229 - Nanotechnologies.
Standards development has progressed in the following areas: Terminology, Measurement and Characterization, EHS, and Material Specification.
An interlaboratory comparison has been organized to validate the performance of protocols for measuring the crystallinity of cellulose nanomaterials (CNM) using powder X-ray diffraction (PXRD) with Rietveld modelling. The comparison is organized through the International standardisation network, VAMAS. The results will provide the pre-normative data for an ISO Technical Specification (TS 23361) which has recently been approved as a new work item at ISO TC/229. Additional participants are welcome.
ISO/TC 229 - TS 20477:2017 : Standard terms and their definition for cellulose nanomaterial
ISO/TC 229 - TR 19716:2016 : Characterization of cellulose nanocrystals
CSA Z5100-17 : Cellulose nanomaterials - Test methods for characterization
CSA Z5200-17 : Cellulose nanomaterials - Blank detail specification
ISO/TC 6 – IS 21400:2018: Determination of cellulose nanocrystal sulfur and sulfate half-ester content
ISO/TC 6 – DIS 1762:2019: Determination of residue (ash content) on ignition at 525 ℃
ISO/TC 6 – DIS 2144:2019: Determination of residue (ash content) on ignition at 900 ℃
ISO/TC 6 – DIS 12830:2019: Determination of acid-soluble magnesium, calcium, manganese, iron, copper, sodium and potassium
ISO/TC 229 – TS 21346:2021: Characterization of individualized cellulose nanofibrils
ISO/TC 6 – WD 638-1 : Determination of dry matter content by over-drying method – Part 1, Materials in solid form, under publication
ISO/TC 229 – TS 23151 : Particle size distributions for cellulose nanocrystals, under publication
ISO/TC 229 – WD 23361 : Crystallinity of cellulose nanomaterials by powder X-ray diffraction
This Roadmap is a result of a 2011 International Standards Workshop held on June 9, 2011 in Washington, D.C. The Roadmap was written by a team of global experts following in-depth break-out sessions conducted at the workshop.