Zhang Mengmeng, Sui Zhihui, Sun Lijian, Zhang Qi, Zhao Wenjing, He Longyu, Gao Shuzhen, Hu Fang
School of Light Industry and Textile, Qiqihar University, Qiqihar, Heilongjiang 161006, PR China; Engineering Research Center for Hemp and Product in Cold Region of Ministry of Education, Qiqihar 161006, PR China.
School of Light Industry and Textile, Qiqihar University, Qiqihar, Heilongjiang 161006, PR China; Engineering Research Center for Hemp and Product in Cold Region of Ministry of Education, Qiqihar 161006, PR China.
Int J Biol Macromol. 2025 Sep;322(Pt 3):146968. doi: 10.1016/j.ijbiomac.2025.146968. Epub 2025 Aug 18.
In this study, a assembly technique based on phosphorylated sodium alginate (PSA) and fluorosilicone waterborne polyurethane (FSiWPU) was developed, and a multifunctional hemp cellulose fabric system which integrates flame retardant, hydrophobic and UV resistant properties was successfully constructed. Stable multilayer structures are formed by utilizing the hydrogen bonding between the phosphate group/carboxylic acid group of PSA and the carbamate group (-NHCOO-) of FSiWPU. The phosphorylation of sodium alginate significantly improves its thermal stability and generates a dense carbon layer with polyurethane decomposition products at high temperatures, resulting in a limiting oxygen index (LOI) of 32.7 % for hemp cellulose fabric, which achieves a UL-94 V-0 rating. Compared with the original fabric, the peak and total heat release rates of phosphorylated sodium alginate/fluorosilicone waterborne polyurethane (PSA/FSiWPU) coated hemp cellulose fabric decreased by 75.2 % and 90.1 %, respectively. Meanwhile, the fluorosilicon component in FSiWPU is enriched on the fabric surface and the water contact angle of the coated fabric reaches 136.05°, which endows the fabric with excellent hydrophobicity and self-cleaning properties. Encouragingly, the functional coating is universal and suitable for a variety of substrates. Moreover, the coated fabric shows excellent UV resistance, with a UV protection factor of 91.26 and a UVA transmission rate of <5 %. Not only that, coated fabrics also have good mechanical properties and washability. Therefore, this work not only opens up new idea for the multifunctional finishing of hemp cellulose fabrics, but also has great potential in practical applications.
在本研究中，开发了一种基于磷酸化海藻酸钠（PSA）和氟硅水性聚氨酯（FSiWPU）的组装技术，并成功构建了一种集成阻燃、疏水和抗紫外线性能的多功能麻纤维织物体系。利用PSA的磷酸基团/羧酸基团与FSiWPU的氨基甲酸酯基团（-NHCOO-）之间的氢键形成稳定的多层结构。海藻酸钠的磷酸化显著提高了其热稳定性，并在高温下与聚氨酯分解产物生成致密的碳层，使得麻纤维织物的极限氧指数（LOI）达到32.7%，达到了UL-94 V-0等级。与原始织物相比，磷酸化海藻酸钠/氟硅水性聚氨酯（PSA/FSiWPU）涂层麻纤维织物的峰值热释放速率和总热释放速率分别降低了75.2%和90.1%。同时，FSiWPU中的氟硅成分富集在织物表面，涂层织物的水接触角达到136.05°，赋予织物优异的疏水性和自清洁性能。令人鼓舞的是，该功能涂层具有通用性，适用于多种基材。此外，涂层织物表现出优异的抗紫外线性能，紫外线防护系数为91.26，UVA透过率<5%。不仅如此，涂层织物还具有良好的机械性能和可洗性。因此，这项工作不仅为麻纤维织物的多功能整理开辟了新思路，而且在实际应用中具有巨大潜力。
