Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China.
Int J Biol Macromol. 2024 Apr;263(Pt 1):130176. doi: 10.1016/j.ijbiomac.2024.130176. Epub 2024 Feb 17.
Smart gating membranes have drawn much attention due to the controllable pore structure. Herein, a smart gating membrane with dual responsiveness was prepared from bacteria cellulose (BC) grafted with pH- and temperature-responsive polymers. By external stimulation, the average pore size of the membrane can be controlled from 33.75 nm to 144.81 nm, and the pure water flux can be regulated from 342 to 2118 L·m·h with remarkable variation in the pH range of 1-11 and temperature range of 20-60 °C. The adjustability of pore size is able to achieve the gradient selective separation of particles and polymers with different sizes. In addition, owing to the underwater superoleophobicity and the nanoscale pore structure, the membrane separation efficiencies of emulsified oils are higher than 99 %. Moreover, the controllable pore size endows the membrane with good self-cleaning performance. This nanocellulose-based smart gating membrane has potential applications in the fields of controllable permeation, selective separation, fluid transport, and drug/chemical controlled release systems.
智能门控膜因其可控的孔结构而备受关注。本文通过细菌纤维素（BC）接枝 pH 和温度响应性聚合物制备了一种具有双重响应性的智能门控膜。通过外部刺激，膜的平均孔径可从 33.75nm 调控至 144.81nm，纯水通量可从 342L·m·h 调控至 2118L·m·h，在 pH 值为 1-11 和温度范围为 20-60°C 内有显著变化。孔径的可调节性能够实现不同尺寸的颗粒和聚合物的梯度选择性分离。此外，由于水下超疏油性和纳米孔结构，该膜对乳化油的分离效率高于 99%。此外，可控的孔径赋予了膜良好的自清洁性能。这种基于纳米纤维素的智能门控膜在可控渗透、选择性分离、流体输送以及药物/化学控制释放系统等领域具有潜在的应用前景。
