Wu Kunlin, Zhang Ding, Liu Minghua, Lin Qi, Shiu Bing-Chiuan
Fujian Engineering and Research Center of New Chinese Lacquer Materials, Ocean College, Minjiang University, Fuzhou 350108, China.
College of Environment and Resources, Fuzhou University, Fuzhou 350108, China.
Nanomaterials (Basel). 2020 Aug 31;10(9):1723. doi: 10.3390/nano10091723.
Raw lacquer (RL), ethanol being used as the solvent, was added to polyvinyl pyrrolidone (PVP) and then electrospun into RL/PVP nanofilms. Manufacturing parameters such as RL/PVP ratio, voltage, flow velocity, needle type, and the distance between syringe and the collection board were systematically investigated. A scanning electronic microscope (SEM) was used to observe the surface morphology of nanofilms; the block drop method was used to measure the water contact angle; the mechanical properties of RL/PVP nanofilms of different proportions were tested by universal material testing machine; and Fourier-transform infrared spectroscopy (FT-IR) was used to characterize the structure. Based on the water resistance and acid resistance measurements, the proposed nanofilms demonstrated to be water and acid resistant were successfully produced. The results show that PVP that melts in water becomes incompatible with water after adding raw lacquer, and the acid resistance is greatly improved. Furthermore, the smaller the fiber diameter, the better the mechanical properties of the nanofilms are under low ratio of RL/PVP. With a high proportion of RL/PVP, the inner structure of the nanofilm is denser, and the water resistance and acid resistance are better. The dense structure can protect the inner material of the nanofilms.
以乙醇为溶剂，将生漆（RL）加入到聚乙烯吡咯烷酮（PVP）中，然后通过静电纺丝制成RL/PVP纳米薄膜。系统研究了RL/PVP比例、电压、流速、针头类型以及注射器与收集板之间的距离等制造参数。使用扫描电子显微镜（SEM）观察纳米薄膜的表面形态；采用液滴法测量水接触角；用万能材料试验机测试不同比例的RL/PVP纳米薄膜的力学性能；并利用傅里叶变换红外光谱（FT-IR）对结构进行表征。基于耐水性和耐酸性测量，成功制备出了具有耐水和耐酸性能的纳米薄膜。结果表明，在水中可熔融的PVP加入生漆后与水不相容，耐酸性得到极大提高。此外，在RL/PVP比例较低时，纤维直径越小，纳米薄膜的力学性能越好。当RL/PVP比例较高时，纳米薄膜的内部结构更致密，耐水性和耐酸性更好。致密结构可保护纳米薄膜的内部材料。
