Synthesis of fiber crosslinking cationic latex and its effect on surface properties of paper

• Published in: Progress in organic coatings Vol. 76; no. 1; pp. 11 - 16
• Main Authors: Yan, Xiuhua, Ji, Yongxin, He, Ting
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2013
• Subjects: Fiber crosslinking cationic latex; Paper sizing agent; Polymeric emulsifier; Surface property; Polymeric emulsifier; Surface property; Paper sizing agent; Fiber crosslinking cationic latex
• ISSN: 0300-9440; 1873-331X
• DOI: 10.1016/j.porgcoat.2012.08.003

Comparing with AIBA, APS, and FeSO4+H2O2 systems, the excellent properties of sized paper was obtained from AIBN system: The Cobb value is 58.25g/m2; burst strength is 386kPa; surface strength is 177cm/s; and tensile strength is 58.58kN/m. All papers showed nearly the same whiteness regardless of the initiator used in the systems. [Display omitted] ► In this study, we synthesized a polymeric emulsifier. ► Fiber crosslinking latexes were synthesized in the presence of the emulsifier. ► The latex particles contain both epoxy and quaternary ammonium groups. ► The sized paper presents better physical properties than the unsized paper. Series of fiber cross-linking cationic latexes containing both epoxy and quaternary ammonium groups were synthesized in the presence of styrene/butyl acrylate/steary methacrylate/dimethyl amino ethyl methacrylate/epichlorohydrin (SBSDE). The chemical structure and composition of SBSDE were confirmed by 1H nuclear magnetic resonance spectrum (1H NMR), Fourier transforms infrared (FTIR), gel permeation chromatography (GPC) analyses. Latexes were subsequently used as sizing agents and surface properties (water resistance, surface strength, burst strength, whiteness, and tensile strength) of paper were examined and compared. Results revealed that SBSDE was a potential candidate for emulsion polymerization. Monomer ratio, initiator type, and SBSDE content determined the properties of latexes and strongly affected the sizing performance. The superior surface sizing agent was obtained by using 2,2-azobisisobutyronitrile as the initiator, when the concentration of SBSDE was 8.5wt%, the butyl acrylate (BA)/styrene (St) ratio was 0.85.