Organofluorinated surfactants are widely employed in textile finishing agents (TFAs) to achieve oil, water, and stain repellency. This has been regarded as an important emission source of per-and polyfluoroalkyl subst...Organofluorinated surfactants are widely employed in textile finishing agents (TFAs) to achieve oil, water, and stain repellency. This has been regarded as an important emission source of per-and polyfluoroalkyl substances (PFASs) to the environment. China is the biggest manufacturer of clothes, and thus TFA production is also a relevant industrial activity. Nevertheless, to date, no survey has been conducted on PFAS contents in commercially available TFAs. In the present study, TFA products were investigated by the Kendrick mass defect method. The quantification results demonstrated a significant presence of perfluorooctane sulfonate (0.37 mg/L) in TFAs manufactured by electrochemical fluorination technology. The products obtained by short-chain PFAS-based telomerization were dominated by perfluorooctanoic acid (mean concentration: 0.29 mg/L), whose values exceeded the limits stated in the European Chemical Agency guidelines (0.025 mg/L). Moreover, the total oxidizable precursor assay indicated high levels of indirectly quantified precursors with long alkyl chains (C7–C9). Together, these results suggest that there is currently a certain of environmental and health risks in China that originates from the utilization of TFAs, and a better manufacturing processes are required to reduce such risks.展开更多
Amino - functional silicone oil was used as a raw material to synthesize antimicrobial agent by means of alkyla-tion. Through synthetically judging every possible influential factor, a new method was developed to synt...Amino - functional silicone oil was used as a raw material to synthesize antimicrobial agent by means of alkyla-tion. Through synthetically judging every possible influential factor, a new method was developed to synthesize antimicrobial agent CL under moderate condition. Then, antimicrobial agent CL was emulsified with surfactants AEO - 9 and AEO - 3 in appropriate proportion. Practical properties of antimicrobial fabric were tested.展开更多
为了探讨羊毛纺织产品染整研究进展与前沿热点,借助CiteSpace可视化软件工具,从关键词词频、聚类视图、时间线视图、突现词等方面对来源于CNKI核心数据库与Web of Science核心数据库的中英文文献进行计量分析。研究发现:现有文献对羊毛...为了探讨羊毛纺织产品染整研究进展与前沿热点,借助CiteSpace可视化软件工具,从关键词词频、聚类视图、时间线视图、突现词等方面对来源于CNKI核心数据库与Web of Science核心数据库的中英文文献进行计量分析。研究发现:现有文献对羊毛纺织产品的低温染色及天然染料等方面开展的研究较早,研究热度高且持续至今;针对同色性、数码印花、等离子体、色素、壳聚糖和抗菌性能的研究开始较晚,且正在进一步深入和完善;羊毛纺织产品的数码印花技术、使用壳聚糖等物质提高羊毛纺织产品上染率和物理性能是接续研究热点。展开更多
文摘Organofluorinated surfactants are widely employed in textile finishing agents (TFAs) to achieve oil, water, and stain repellency. This has been regarded as an important emission source of per-and polyfluoroalkyl substances (PFASs) to the environment. China is the biggest manufacturer of clothes, and thus TFA production is also a relevant industrial activity. Nevertheless, to date, no survey has been conducted on PFAS contents in commercially available TFAs. In the present study, TFA products were investigated by the Kendrick mass defect method. The quantification results demonstrated a significant presence of perfluorooctane sulfonate (0.37 mg/L) in TFAs manufactured by electrochemical fluorination technology. The products obtained by short-chain PFAS-based telomerization were dominated by perfluorooctanoic acid (mean concentration: 0.29 mg/L), whose values exceeded the limits stated in the European Chemical Agency guidelines (0.025 mg/L). Moreover, the total oxidizable precursor assay indicated high levels of indirectly quantified precursors with long alkyl chains (C7–C9). Together, these results suggest that there is currently a certain of environmental and health risks in China that originates from the utilization of TFAs, and a better manufacturing processes are required to reduce such risks.
文摘Amino - functional silicone oil was used as a raw material to synthesize antimicrobial agent by means of alkyla-tion. Through synthetically judging every possible influential factor, a new method was developed to synthesize antimicrobial agent CL under moderate condition. Then, antimicrobial agent CL was emulsified with surfactants AEO - 9 and AEO - 3 in appropriate proportion. Practical properties of antimicrobial fabric were tested.
文摘为了探讨羊毛纺织产品染整研究进展与前沿热点,借助CiteSpace可视化软件工具,从关键词词频、聚类视图、时间线视图、突现词等方面对来源于CNKI核心数据库与Web of Science核心数据库的中英文文献进行计量分析。研究发现:现有文献对羊毛纺织产品的低温染色及天然染料等方面开展的研究较早,研究热度高且持续至今;针对同色性、数码印花、等离子体、色素、壳聚糖和抗菌性能的研究开始较晚,且正在进一步深入和完善;羊毛纺织产品的数码印花技术、使用壳聚糖等物质提高羊毛纺织产品上染率和物理性能是接续研究热点。
