Long-lasting Antibacterial Properties of the Chrome-free Tanned Wet-white Based on CH/β-CD
A novel leather antibacterial method was developed using β-cyclodextrin(β-CD)aldehyde derivatives and ciprofloxacin hydrochloride(CH)as antibacterial agents in chrome-free tanned wet-white(MCFL),which can improve the long-term antibacterial performance of the wet-white.The structure and properties of the obtained wet-white were characterized using FTIR,SEM,DSC and TGA,and their antibacterial effects on E.coli and S.aureus were investigated.The results showed that compared with MCFL without β-CD modification and CH treatment,the Ts,Td,and Tp of the wet-white increased by 5.7℃,4.9 ℃,and 6.9℃,respectively.After 90 days of storage,after CH treatment,the antibacterial rates against E.coli and S.aureus still reached 99.7％and 97.4％,respectively,which were 29.8％and 34.4％higher than those without β-CD treatment.It indicates that the modified MCFL has better thermal stability,and the introduction of β-CD cavities can include antibacterial agents,which can improve the poor antibacterial persistence caused by the release of small molecule antibacterial agents.The antibacterial modification of MCFL using β-cyclodextrin aldehyde derivatives and CH can meet the production needs of the wet-white,which provide a new process for achieving long-lasting antibacterial properties of the wet-white.
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