Fiber Characteristics and Bonding Strength of Poplar Refiner-Chemical Preconditioned Alkaline Peroxide Mechanical Pulp Fractions

Abstract

In China, alkaline peroxide mechanical pulping performed with refinerchemical preconditioning (P-RC APMP) is well known to produce fiber with high bulk, opacity, and light scattering coefficient but weak bonding and strength properties. In this study, the characteristics of different P-RC APMP fiber fractions were investigated, and their effects on bonding strength properties were determined. The results showed that there was only 5.8% R30 fiber fraction and 14.1% P100/R200 fiber fraction, and the specific surface area increased from R30 to P100/R200. The tensile index increased by 51.85% and the bonding index increased by 15.35%, when the fibers were changed from the R30 fraction to the P100/R200 fraction. The short fiber fraction (P100/R200 fraction) had smaller fiber length and coarseness but larger specific surface area and greater surface charge density than the long fiber fraction (R30 fraction). The fiber specific surface area and surface charge density made significant contributions to the bonding capacity, whereas fiber coarseness and length were negatively correlated with the tensile index.

Enhancing the alkaline peroxide mechanical pulp strength by cationization with 3-chloro-2-hydroxypropyl trimethyl ammonium chloride

“…Thus, this pulp has been successfully applied in producing some high grade papers and multi-ply coated packaging board. However, during the refining stage of APMP pulping process, hydrophobic materials, such as lignin, are precipitated onto the surface of APMP fibers (Hu et al 2015), which negatively affect the bonding strength between fibers as stated in previous studies (Koljones et al 2003). The inter-fiber bonding depends mainly on the intermolecular hydrogen bonding and van der Waals forces between adjacent fibers surfaces (Mader et al 2016).…”

“…Faced with shortages of raw materials in the pulp and paper industry, high yield pulping (HYP), a primary method using mechanical procedures including refining and grinding, provides an alternative technology (Ni 2005). Traditionally, the production yield of HYP is 60% to 80%, which is much higher than that of chemical pulp (30% to 40%) (Chen et al 2013;Li et al 2015). Presently, alkaline peroxide mechanical pulp (APMP) is the most popular HYP production process, particularly in China (Li et al 2014).…”

Responses of radial growth, wood density and fiber traits to planting space in poplar plantations at a lowland site

“…Pearson correlation analysis showed a significantly negative relationship of tree-ring width to wood basic density, fiber length and fiber width, but especially fiber length (Ohshima et al 2005;Pirralho et al 2014). This determines sheet formation, drainage properties, strength and optical properties and is correlated with various physical and mechanical properties of the wood (Young 1994;Ai and Tschirner 2010;Li et al 2015). In addition, wood basic density (WD) is also considered one of the most important wood properties, and has a major impact on the freight costs, wood mechanical properties, pulp yield per unit mass of wood, and paper quality (Francis et al 2006;Santos et al 2012).…”

Estimating the Inter-fiber Bonding Capacities of High-yield Pulp (HYP) Fibers by Analyzing the Fiber Surface Lignin and Surface Charge

“…Compared with bleached chemical pulps, HYPs have a high bulk, opacity, and light scattering coefficient, but their main drawback is their weak inter-fiber bonding strength, which limits the application of HYPs in value-added products (Li et al 2014(Li et al , 2015. In the past decade, a kind of HYPs, P-RC APMP has achieved widespread application in many paper and paper-based products in worldwide, especially in China (Li et al 2014;Zhao et al 2016).…”

“…Fiber morphology is the basic characteristic of lignocellulosic fibers. It influences the strength properties and the papermaking properties of fibers from different materials and manufacturing processes (Li et al 2015). The fiber length, fiber coarseness, and fines content are the key factors affecting fiber strength properties.…”