Li Na, Kang Gaowei, Liu Hao, Qiu Weiwang, Wang Qian, Liu Liu, Wang Xueli, Yu Jianyong, Li Faxue, Wu Dequn
Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Songjiang District, Shanghai 201620, China.
Innovation Center for Textile Science and Technology, Donghua University, 2999 North Renmin Rd., Songjiang District, Shanghai 201620, China.
J Colloid Interface Sci. 2022 Jul 15;618:462-474. doi: 10.1016/j.jcis.2022.03.078. Epub 2022 Mar 24.
Flame retardant and antibacterial investigation of cellulose has attracted more and more attention. In order to improve the modification efficiency, inspired by multiple hydrogen bonding in spider silk, flame retardant and antibacterial dual function modified cellulose was achieved by multi structure hydrogen bonding in this research. A novel nano SiO based Schiff base flame retardant (SiAPH) and dodecyl quaternary ammonium salt (HDAC) were synthesized. Tannin (TA) was introduced as medium to provide synergistic flame retardant and antibacterial with SiAPH and HDAC. The flame retardancy assessment demonstrated that the limiting oxygen index (LOI) of modified cotton fabrics increased from 18% to 26.1%, and the peak of heat release rate (pHRR) decreased by 41.0%, UL-94 vertical combustion proved the modified cotton fabrics had capability of self-extinguishing. The antibacterial of modified fabrics were confirmed against Staphylococcus aureus and Escherichia coli, and the inhibition rate reached to 99.1%. In addition, it worth noting that the biocompatibility and antibacterial activity of modified fabrics were evaluated via MTS assay and establishment of animal wound model. Low toxicity of the fabrics was verified by the L929 fibroblast cells. The anti-infection experiment model showed that the modified fabrics had a positive effect on prevention of infection, and the wound healing rate reached to 86.8% after 14 days' treatment. The flame retardancy, antibacterial and biocompatibility of the functional cotton fabrics indicated that they were ideal candidate for applications of vehicle interior, soft decoration in public and medical scene.
纤维素的阻燃和抗菌研究越来越受到关注。为了提高改性效率，受蜘蛛丝中多重氢键的启发，本研究通过多重结构氢键实现了纤维素的阻燃抗菌双功能改性。合成了一种新型的纳米SiO基席夫碱阻燃剂（SiAPH）和十二烷基季铵盐（HDAC）。引入单宁（TA）作为媒介，与SiAPH和HDAC协同提供阻燃和抗菌性能。阻燃性能评估表明，改性棉织物的极限氧指数（LOI）从18%提高到26.1%，热释放速率峰值（pHRR）降低了41.0%，UL-94垂直燃烧试验证明改性棉织物具有自熄能力。改性织物对金黄色葡萄球菌和大肠杆菌具有抗菌作用，抑菌率达到99.1%。此外，值得注意的是，通过MTS试验和建立动物伤口模型对改性织物的生物相容性和抗菌活性进行了评估。L929成纤维细胞验证了织物的低毒性。抗感染实验模型表明，改性织物对预防感染有积极作用，治疗14天后伤口愈合率达到86.8%。功能性棉织物的阻燃性、抗菌性和生物相容性表明它们是汽车内饰、公共和医疗场景软装应用的理想候选材料。
