Effects of Silane Debonder on the Properties of Fluff Pulp and the Study of Relevant Mechanism

Abstract

The influence of silane debonder on the properties of fluff pulp fibers was investigated. The results showed that the burst index and internal bond strength of pulp sheet decreased with the increasing debonder loading. The density and zero-span tensile strength didn't change significantly when the debonder was added. The absorption capacity of fiber increased with increasing the de-bonder loading and achieved a maximum value of 10.3 g·g-1 when the debonder loading was 2.5%. The relevant mechanism was studied by X-ray Diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and energy dispersive X-ray analysis (EDAX). XRD analysis indicated that the debonder had no great influence on the crystal structure of fiber. FT-IR analysis results showed that it was easier to break the intermolecular hydrogen bond than the intramolecular hydrogen bond with the incorporation of debonder. Therefore, the proportion of intramolecular hydrogen was increased. The EDAX results indicated that the debonder can decrease the binding force of fiber by shielding the hydroxyl groups and preventing the formation of hydrogen bonds.