High-transparent material plays a pivotal role in optical engineering, yet faces practical challenges such as susceptibility to abrasion and ultraviolet degradation. To address these issues, we propose a simple approach for obtaining a multifunctional transparent polymethyl methacrylate. In this study, MWCNT@Fe3O4 was utilized as a hybrid core covalently bonded to a silane coupling agent, which was subsequently ion-exchanged with a surfactant to yield monodisperse MWCNT@Fe3O4 nanofluids. These nanofluids were then blended with polymethyl methacrylate through a simple casting process, resulting in a transparent composite material with good transparency (over 85 %), low friction (coefficient of friction < 3), UV resistance (UV absorption up to 73.35 %), and antistatic properties. The MWCNT@Fe3O4 nanofluids combine the benefits of liquid and solid lubricants by reducing the friction coefficient and enhancing the wear resistance of the composite material. Moreover, the fluidity of MWCNT@Fe3O4 nanofluids forms an anti-friction layer during friction, thereby improving the overall anti-friction properties of the composite material. Additionally, the hybrid core enhances the anti-ultraviolet performance of the composite film while the long chain lubricating layer improves its antistatic and antifouling capabilities. By incorporating MWCNT@Fe3O4 nanofluids as a filler, we have developed multifunctional transparent polymethyl methacrylate material that holds promise for advanced applications.

Polyether ether ketone (PEEK) is a high-performance thermoplastic used as a separation membrane for waste-water treatment, purification, and recycling, especially in harsh environments. However, the applications of PEEK membranes are limited by their processing difficulty, low permeability, and membrane fouling. Herein, a PEEK hollow fibre membrane (PHFM) was fabricated by melt-spinning of polyetherimide (PEI)/PEEK blends and extracting PEI. Thereafter, a hydration layer consisting of 2-hydroxylethyl acrylate (HEA) chains was constructed on the PHFM surface based on the surface-initiated atom transfer radical polymerisation method. The grafting density and grafting length of the HEA chains were modulated by varying the bromination time and ATRP reaction time, and the hydrophilicity of the resulting PHFM surface was enhanced significantly without deteriorating its original porous structure. The controllable pores and hydrated layers on the PHFM surface simultaneously improved the permeability, separation performance, and anti-fouling properties of the membrane. Under a bromination time of 6 h and an ATRP reaction time of 8 h, the water flux of the modified PHFM was enhanced by 364 %. The rejection rate of bovine serum albumin (BSA) by the modified membrane exceeded 90 %. According to the extended Derjaguin-Landau-Verwey-Overbeek theory, the improved anti-fouling performance was related to the weakened acid-base attraction between the foulants and membrane with the hydration layer. After multiple separation-washing cycles, the total fouling and irreversible fouling of the modified PHFM were reduced. The normalised water flux and BSA rejection ratio of the modified anti-fouling PHFM remained 216 % and 90 %, respectively.

Aramid fiber is widely used in aerospace, machinery, construction, and other fields for its high strength, high elastic modulus, lightweight, and superior comprehensive performance. However, because aramid fiber is difficult to be melted and reprocessed, efficient and environmentally friendly recycling of aramid fiber waste (AFW) is an urgent and challenging issue. In this work, we reported a facile way to recycle AFW for the preparation of friction-resistant polyoxymethylene (POM)/AFW composites. The ultrafine AFW powder with 64.69 mu m in size was fabricated by solid state shear milling (S3M) technology, which broke the amide bond due to the strong compression and shearing during milling. With the increase of milling cycles, the roughness and active groups on the surface of AFW were increased, which was contributed to improving the compatibility between AFW and POM matrix. The morphology observation indicated a good dispersion of AFW in POM. The mechanical property test results showed that the flexural strength increased from 52.69 MPa to 80.12 MPa with 20 wt.% AFW. As a friction modifier, the addition of AFW could improve the tribological properties of POM/AFW composites, and the coefficient of friction (COF) and wear rate of composites with 20 wt.% AFW could decrease by 53.02% and 69.52%, respectively. The S3M technology presented in this work is an efficient and industrialized strategy for AFW recycling to prepare value-added products, which has great potential in the engineering application field.

Herein, inorganic silicon dioxide (SiO2) nanoparticles are deposited on the surface of continuous basalt fibers (CBFs) to enhance the interfacial interactions between CBFs and epoxy matrix (EP) and the tensile strength of composites. According to results from scanning electron microscopy and atomic force microscopy, the surface morphology of CBFs changes from smooth to rough with the increase of SiO2 deposition content. The rough surface plays a role of chock to make CBFs implant into the EP better, offering strong mechanical engagement effect to the interface between CBFs and EP. Therefore, the interfacial shear strength (IFSS) between CBFs and EP and the tensile strength of composites both increase. However, depositing excessive SiO2 nanoparticles also brings some porous structures on CBFs surface, becoming defects and stress concentration points to weaken the IFSS and the tensile strength of composites. Finally, a comparison between grafting organic aliphatic chains and depositing inorganic rigid nanoparticles about their effects on the surface roughness of modified CBFs and the interfacial interactions between modified fibers and matrix is carried out to clarify the reinforcing mechanisms of interfacial adhesion and the tensile strength of composites.