Synthesis of graphene oxide–methacrylic acid–sodium allyl sulfonate copolymer and its tanning properties

Abstract

Graphite oxide nanosheets (GONs) and the copolymer of GONs with methacrylic acid (MAA) and sodium allyl sulfonate (SAS) (poly(GON-MAA-SAS)) were prepared. The GONs in poly(GON-MAA-SAS) are smaller and uniformly dispersed, allowing them to penetrate into collagen fibers of leather and produce better tanning effects than current nano-tanning agents. Tanning effects due to chemical bonding and nanoeffects are elucidated by measuring the shrinkage temperature (T s ) of wet and dry leather. The results indicate that poly(GON-MAA-SAS) could be used alone as a tanning agent to provide excellent mechanical properties, especially good elasticity and softness, although the T s is slightly lower than that of chrome-tanned leather. Poly(GON-MAA-SAS) in combination with a chrome tanning agent could allow the dosage of the latter to be halved. These results indicate the potential for new nano-tanning agents to reduce the pollution caused by tanning agents. ª 2015 Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Fabricating an anionic polyacrylamide (APAM) with an anionic block structure for high turbidity water separation and purification

“…27,28 Meanwhile, the previous researches have manifested that AM and SAS were harmless and eco-friendly, and therefore AM and SAS were selected to prepare template copolymer (TPAS) through UPT and it has prospective applications in water treatment in future. 29,30 This new way for preparation of a new anionic copolymer with a microblock structure will be meaningful and signicant in polymer synthesis and application.…”

Synthesis and catalytic evaluation of PVP–CeO2/rGO as a highly efficient and recyclable heterogeneous catalyst for multicomponent reactions in water

“…1a ) displayed the characteristic bands at 3417 cm −1 , 1734 cm −1 , 1615 cm −1 , 1410 cm −1 , 1234 cm −1 and 1045 cm −1 for the stretching vibration of the –OH group, C O stretching vibration, C C stretching vibration of aromatic rings, –OH deformation, C–OH stretching and C–O (epoxy) stretching respectively. 46 When PVP–CeO 2 was introduced into GO sheets, the intensity of C O and C–OH bands decreased significantly whereas the band at 1045 cm −1 disappeared completely indicating the reduction of GO leading to the formation of PVP–CeO 2 /rGO ( Fig. 1b ).…”