TiO2纳米类流体的制备及其在皮革文物中的应用

Preparation of TiO2 nanofluids and application in the leather artifacts

摘要:

为抑制细菌对皮革文物的侵蚀，延长皮革文物存放寿命，以纳米TiO2、3-(三甲氧基硅基)-γ-缩水甘油醚氧丙基三甲氧基硅烷硅（KH560）和聚醚胺（M2070）为原料，制备共价型TiO2纳米类流体（C-TiO2 nfs）；以纳米TiO2、二甲基十八烷基[3-(三甲氧基硅基)丙基]氯化铵（DC5700）和壬基酚聚氧乙烯醚硫酸钠（NPES）为原料，制备离子型TiO2纳米类流体（I-TiO2 nfs），采用循环刷涂法将两种TiO2纳米类流体（TiO2 nfs）应用于老化皮革的保护。通过FTIR、TEM、流变仪等对TiO2 nfs的结构组成、微观形貌和流动性进行表征，采用数码相机、测色配色分光光度计等对TiO2 nfs处理前后的老化皮革进行表征，采用伺服材料多功能高低温控制试验机、紫外-可见-近红外分光光度计等对的老化皮革的力学性能、抗紫外性能、抗菌性能进行检测，并考察其长期稳定性。结果表明，C-TiO2 nsf和I-TiO2 nfs均为白色液体，在室温下具有较好的流动性，且C-TiO2 nsf流动性更好；经TiO2 nfs处理后，老化皮革的颜色和结构无明显变化，而力学性能、抗紫外性能和抗菌性能均得到提升，并且处理后的皮革具有长期稳定性。C-TiO2 nfs处理后的老化皮革对大肠杆菌（E. coli）和金黄色葡萄球菌（S. aureus）的抑菌率分别达61.3%和69.9%；I-TiO2 nfs处理的老化皮革则具有更好的柔软度、力学性能和抗菌性，处理后老化皮革的柔软度、抗张强度和断裂伸长率分别可达3.32 mm、17.32 MPa和81.71%，对E. coli和S. aureus的抑菌率分别可达97.0%和98.2%。

Abstract:

To inhibit bacterial corrosion on leather artifacts and extend their storage lifespan, C-TiO2 nfs were synthesized from nano-TiO2, KH560, and M2070; I-TiO2 nfs were prepared using nano-TiO2, DC5700, and NPES. These TiO2 nfs were both applied to aging leather using a cyclic brushing method.The structural composition, microscopic morphology, and fluidity of the TiO2 nfs were characterized using FTIR, TEM, and rheometer. The aging leather before and after TiO2 nfs treated were analyzed using digital camera, spectrophotometer, SEM, etc. to evaluate changes in color and structure. Additionally, the mechanical properties, UV resistance, antibacterial performance, and long-term stability of the treated leather were tested using servo material multifunctional high/low-temperature control testing machine, UV-visible-near-infrared spectrophotometer , etc. .The results showed that C-TiO2 nfs and I-TiO2 nfs are both white liquids with good fluidity at room temperature, and C-TiO2 nfs exhibiting better fluidity. After treated by TiO2 nfs, the color and structure of the aging leather remained unchanged, and its mechanical properties, UV resistance, and antibacterial performance improved significantly, demonstrating long-term stability. C-TiO2 nfs treated aging leather achieved inhibition rates of 61.3% and 69.9% against E. coli and S. aureus, respectively. I-TiO2 nfs treated leather exhibited superior softness, mechanical properties, and antibacterial performance, with softness, tensile strength, and elongation at break reaching 3.32 mm, 17.32 MPa, and 81.71%, respectively. The inhibition rates against E. coli and S. aureus achieved 97.0% and 98.2%, respectively.