Xylans were selectively removed from paper grade pulps by nitren extraction in order to produce dissolving pulps. The impact of nitren charge on the removal of hemicelluloses was demonstrated for a birch and mixed softwood kraft pulp. The 95% purity level could easily be reached for the birch kraft pulp. Softwood glucomannans were almost insoluble under the investigated extraction conditions ap...

This review focuses on fiber analysis methods, where the fibers are carried in suspension. They are photographed in a flow cell and their properties are evaluated by digital image analysis. Three fields of fiber analysis are covered: Fiber morphology, pulp surface chemistry, and chemically induced swelling respectively dissolving behaviour of pulp. For fiber morphology commercial analyzers were...

OBJECTIVES The aim was to evaluate the shelf life and the dissolving and antibacterial properties of a neutralized 2.5% NaOCl solution. STUDY DESIGN The loss of available chlorine and the pH of the neutralized 2.5% NaOCl solution were recorded to determine its shelf life. The dissolving action on bovine dental pulp was assessed measuring weight loss, pH variation, and decrease in available ch...

Lyocell fiber has emerged as a new generation of green due to its preparation process and unique properties in comparison with viscose fiber. The raw material for the great impact on quality finished product. However, unlike viscose-grade dissolving pulp, there is no evaluation system Lyocell-grade making it difficult assess material. This study examined approach upgrade paper-grade pulp Under ...

The aim of this study was to evaluate the tissue dissolution ability of different irrigating solutions associated or not to ultrasonic agitation. Ninety bovine pulp fragments (n=10 per group) were weighed and then placed individually in Eppendorf test tubes containing the following irrigants: G1- 2.5% sodium hypochlorite (NaOCl); G2- 2.5% NaOCl + ultrasonic agitation (US); G3- 2.5% NaOCl + 0.2%...

After lytic polysaccharide monooxygenase (LPMO) treatment, colloidally stable and thin cellulose nanofibrils (CNFs) of a uniform width are produced from kraft pulp fibres, which has higher hemicellulose content than dissolving fibres.

Prehydrolysis was used as the first treatment of bamboo materials for producing high dissolving pulp for textile applications. In this paper, green bamboo (Dendrocalamopsis oldhami) was hydrolyzed in water, and the hydrolysis process was optimized. The morphology and super-molecular structures of the raw material and prehydrolyzed material were studied by SEM and XRD, respectively. Based on the...