Abstract：
In this study, graphene oxide/N-halamine nanocomposite was synthesized through Pickering miniemulsion polymerization, which was then coated on cotton surface. The modified cotton exhibited excellent superhydrophobicity, which could effectively prevent microbial infestation and reduce the probability of hydrolysis of active chlorine, with virtually no active chlorine released in water after 72 h. Deposition of reduced graphene oxide nanosheets endowed cotton with ultraviolet-blocking properties, attributing to enhanced UV adsorption and long UV paths. Moreover, encapsulation of polymeric N-halamine resulted in improved UV stability, thus extending the life of N-halamine-based agents. After 24 h of irradiation, 85 % of original biocidal component (active chlorine content) was retained, and approximately 97 % of initial chlorine could be regenerated. Modified cotton has been proven to be an effective oxidizing material against organic pollutants and a potential antimicrobial substance. Inoculated bacteria were completely killed after 1 and 10 min of contact time, respectively. An innovative and simple scheme for determination of active chlorine content was also devised, and real-time inspection of bactericidal activity could be achieved to assure antimicrobial sustainability. Moreover, this method could be utilized to evaluate hazard classification of microbial contamination in different locations, thus broadening the application scope of N-halamine-based cotton fabrics.
摘要：
在这项研究中,通过Pickering细乳液聚合合成了氧化石墨烯/N-卤胺纳米复合材料,然后将其涂覆在棉花表面上。改性棉表现出优异的超疏水性,能有效防止微生物侵染,降低活性氯水解的概率,在72小时后，水中几乎没有活性氯释放。还原氧化石墨烯纳米片的沉积赋予棉花具有紫外线阻挡性能，归因于增强的UV吸附和长的UV路径。此外，聚合物N-卤胺的包封提高了紫外线稳定性，从而延长了基于N-卤胺的试剂的寿命。照射24小时后，保留了85％的原始杀生物成分（活性氯含量），大约97%的初始氯可以再生。改性棉花已被证明是一种有效的抗有机污染物的氧化材料和潜在的抗菌物质。接种的细菌在接触时间1和10分钟后被完全杀死，分别。还设计了一种新颖而简单的测定活性氯含量的方案，并且可以实现杀菌活性的实时检查，以确保抗菌的可持续性。此外，该方法可用于评估不同地点微生物污染的危害分类，从而拓宽了N-卤胺基棉织物的应用范围。
