Search

Setting priorities in CNF particle size measurement: What is needed vs. what is feasible, TAPPI Journal February 2023

ABSTRACT: Measuring the size of cellulose nanomaterials can be challenging, especially in the case of branched and entangled cellulose nanofibrils (CNFs). The International Organization for Standardization, Technical Committee 6, Task Group 1—Cellulosic Nanomaterials, is exploring opportunities to develop standard methods for the measurement of CNF particle size and particle size distribution. This paper presents a summary of the available measuring techniques, responses from a survey on the measurement needs of CNF companies and researchers, and outcomes from an international workshop on cellulose nanofibril measurement and standardization. Standardization needs differed among groups, with Japanese companies mostly requiring measurements for product specification and production control, and other companies mostly needing measurements for safety/regulatory purposes and for grade definitions in patents. Among all the companies, average length and width with percen-tiles (D(10), D(50), D(90)) were the most desired measurands. Workshop participants concurred that defining the location(s) on the CNF at which to measure the width and the length is an urgent and complex question. They also agreed that methods are needed for rapid particle size measurement at the nanoscale. Our recommendation within ISO is to start work to revise the definition of CNFs and develop sample preparation and measurement guidelines. It was also recommended that further research be done to reproducibly prepare hierarchical branched CNF structures and characterize them, develop automated image analysis for hierarchical branched CNF structures, and develop a classification system encompassing measurements at multiple size ranges from micro- to nanoscale to fully characterize and distinguish CNF samples.

A fast and non-destructive alternative to the burnout method for paperboard quality inspections using phase-contrast X-ray imaging, TAPPI Journal February 2023

Barrier Measurement of Packaging Compartments, 18th Biennial TAPPI European PLACE Conference (22EUR)

Bio Productivity, 18th Biennial TAPPI European PLACE Conference (22EUR)

Carbon footprint of cold cut meat packages and role of packaging in elimination of food waste, 18th Biennial TAPPI European PLACE Conference (22EUR)

CIRCULARITY IN FLEXIBLEPACKAGINGS: CHALLENGES ANDOPPORTUNITIES, 18th Biennial TAPPI European PLACE Conference (22EUR)

Design for recycling? PP monomaterials by extrusion lamination with focus on adhesion, 18th Biennial TAPPI European PLACE Conference (22EUR)

Evaluating the Potential and Technical Criteria for Recycling Coated Packaging Papers, 18th Biennial TAPPI European PLACE Conference (22EUR)

Evaluation of the functionality of compostable bioplastics in food applications, 18th Biennial TAPPI European PLACE Conference (22EUR)

Feedblock & Die Technology for Co-Extrusion Coating, 18th Biennial TAPPI European PLACE Conference (22EUR)