The Effect of External and Internal Application of Organosilicon Compounds on the Hydrophobicity of Recycled OCC Paper

Abstract

There are various applications of organosilicon compounds in papermaking. Additionally, organosilicons have been applied to improve the water resistance of some lignocellulosic materials. The performance, however, of such compounds for the hydrophobation of paperboard is unclear. In this study, an organosilicon solution was internally and externally applied to old corrugated container (OCC) paperboard at ambient temperature. Examination of the infrared spectra of treated paperboard confirmed the presence of CH2 groups and hydrophobic organic chains of organosilicon in the treated paperboard. Both internal and external treatment of the paperboard helped its resistance to water, though external treatment was more successful in the late reduction of the contact angle of water droplets and also in reducing water uptake.

Hybrid paper sheets with improved barrier properties

“…So, the coating layer decreases the water barrier properties of the sheets over 75%. It is reported in literature, that samples with water absorption values of 50 g/m 2 or below are accepted as samples with high water barrier properties in paper industry [42,43]. The PDMS/GS/aero/N20 samples had the highest Cobb value.…”

“…Cobb tests are used to calculate the mass of water absorbed by one square meter of paper (based) sample at a given time and is a well known measure for water barrier properties of paper and paper based materials. [41][42][43]. Air permeance and roughness values (ml/min) and Cobb test results (g/m 2 ) of the samples are given in Table 3.…”

“…The Bendsten roughness values of hybrid sheets in Table 3 The Cobb values of hybrid paper sheets reveal the significant increase in water barrier properties of these superhydrophobic samples with respect to that of WFP. Although CA and CAH values are significant scientific data that give an idea about the interaction of hybrid paper sheet surfaces with water, the Cobb test is mainly used in the paper industry to determine the interaction/barrier properties of paper-based samples with/against water [42]. As shown in Table 3, WFP has a Cobb value of 220.2 ± 0.3 g/m 2 , while Cobb values of the superhydrophobic hybrid paper sheets remain all below 50 g/m 2 .…”

Fabrication of a novel high-performance leather waste-based composite retention aid

“…Typical retention aids are single-or multicomponent, and microparticle systems involving synthetic or natural polymers. [5][6][7][8][9][10] Synthetic polymers, such as polyacrylamide derivatives, exhibit satisfactory retention performance at a low dosage, but they are nonrenewable resources and have harmful effects on the environment. 11,12 Among natural polymers, starch derivatives have the advantages of being biodegradable and inexpensive; however, they usually require a relatively high dosage to obtain a desired retention performance.…”

“…11,12 Among natural polymers, starch derivatives have the advantages of being biodegradable and inexpensive; however, they usually require a relatively high dosage to obtain a desired retention performance. 6 Chitosan and guar gum derivatives are only used in high-grade and specialty paper, or stay in the laboratory stage due to their highcost and/or complicated process technology. 7,13 In recent years, the utilization of low cost biomass, including cassava dreg, microbrillated cellulose, and tara gum, 1,14 has received considerable attention.…”