Wang, Xuechuan
[VerfasserIn];
Sun, Siwei
[VerfasserIn];
Wang, Haijun
[VerfasserIn];
Li, Ji
[VerfasserIn]
;
International Union of Leather Technologists and Chemists Societies
Synthesis and Application of Dendriticlinear Polymer PAMAM-Si for Leather Fatliquoring Process
Erschienen:
Freiberg : Verein für Gerberei-Chemie und -Technik e. V., [2019] Freiberg : Forschungsinstitut für Leder und Kunststoffbahnen (FILK) gGmbH, [2019]
Erschienen in:XXXV IULTCS Congress 2019 - Proceedings
Beschreibung:
Content:
Environmental pollution caused by leather making is the primary concern in the development of leather industry. The use of safe, effective and multi-functional green chemical products has the advantages of
reducing leather operations, increasing chemicals utilization, decreasing the environmental burden, improving leather quality. In this study, dendritic-linear polymers of PAMAM-Si 1G and PAMAM-Si 2G were
applied to fatliquoring process, which were prepared by branching polysiloxane on the dendritic polyamide-amine (PAMAM). Then the emulsion properties, fatliquoring properties and fatliquoring
mechanism were studied by EDS, SEM, XRD, TG and washing experiments. The conclusion was drawn that PAMAM-Si are weak alkali products with high emulsion stability. The particle size of PAMAM-Si 1G was 35.8 nm, and that of PAMAM-Si 2G was 26.7 nm. They can improve the softness, shrinkage temperature and physical and mechanical properties of leather. The softness of leather with PAMAM-Si 1G and PAMAM-Si 2G increased by 115.6% and 104.7% respectively. The shrinkage temperature of leather with PAMAM-Si 2G increased by 2.9℃. The Breaking elongation of leather with PAMAM-Si 1G and PAMAM-Si 2G increased by 38.6% and 32.4% respectively. At the same time, PAMAM-Si not only increased the distance and disorder of fiber but combined with collagen fiber through hydrogen bond, a certain amount of physical adsorption and covalent bond.
Take-Away:
1. The dendritic-linear polymers of PAMAM-Si 1G and PAMAM-Si 2G were prepared by branching polysiloxane on the dendritic polyamide-amine (PAMAM).
2. PAMAM-Si can improve the softness, shrinkage temperature and physical and mechanical properties of leather.
3. PAMAM-Si not only increased the distance and disorder of fiber but combined with collagen fiber through hydrogen bond, a certain amount of physical adsorption and covalent bond.