交联对壳聚糖/聚乙二醇/负离子皮革涂饰剂性能的影响

Solution blending used chemical cross-linking and physical cross-linking (Heat) to prepare chitosan/polyethylene glycol/negative oxygen ion (CS/PEG/NOI) composites, in which chemical cross-linking used glycerol (Gly), glutaraldehyde (Glu), graphene oxide (GO). The results showed that cross-linking can effectively improve the performance of the composite coating agent. Physical cross-linking had a lower degree of cross-linking than chemical cross-linking and has a lower effect on its performance. Glycerol cross-linking can improve the dispersibility and hydrophilicity, however the stability decreased significantly. At the same time, the moisture permeability of the leather can be increased to 2.4g/cm2 h; after cross-linking glutaraldehyde, its stability was improved, and its dispersibility and hydrophilicity were reduced; graphene oxide can greatly improve the dispersion and stability, but the hydrophilicity was greatly reduced；the wear resistance of the finished leather can be increased to grade 4, the dry rub resistance was grade 5, and the wet rube resistance was grade 4. The moisture permeability of the finished leather became 1.0g/cm2 h; physical cross-linking can slightly improve the dispersion and hydrophilicity became slightly lower.