Synthesis, Properties, and Applications of Polysulfone/Polyimide Nanocomposite Membrane Reinforced with Silica Nanoparticles

Abstract

We synthesized polysulfone/polyimide nanocomposite membranes by solution casting method and reinforced with silica nanoparticles by in situ and ex situ techniques. Physical characteristics of nanocomposite membranes were explored by using X‐ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. The appropriate ratio of polysulfone and polyimide was revealed through structural analysis. Thermal analysis revealed highest degradation temperature of 580°C for silica reinforced nanocomposite membrane as compared to that of neat polysulfone membrane which was found to be 500°C. On the other hand, glass transition temperature was found to be 85°C for neat polysulfone membrane which was improved to 205°C for polysulfone/polyimide blend membrane with an indication of better compatibility of glassy polymers. Young's modulus of neat polysulfone membrane was 3565.368 MPa which was increased to 5689.035 MPa for polysulfone/polyimide blend membrane and further increased to 7590.340 MPa for silica reinforced polysulfone/polyimide blend membrane. Membrane properties such as porosity and solvent content values were also explored. The antibacterial properties of fabricated nanocomposite membranes were investigated against Klebsiella pneumonia and Salmonella typhi. Better killing results were obtained against bacteria for PSf/PI/SiO2 nanocomposite membrane. POLYM. COMPOS., 40:1897–1910, 2019. © 2018 Society of Plastics Engineers

The effect of silicon groups on the physicochemical property and bioactivity of L‐phenylalanine derived poly(amide‐imide)

“…By regulating the weight percentage of silicon element, PAIS surfaces with different silicon element density were obtained. Consistent with the previous report, the incorporation of silicon element density could obviously reduce thermal stability of PAI 27,28 and improve the strength of polyimide or co‐polyimide matrix 29–32 . The thermal stability of the PAIS decreases with the addition of silicon element, which may be due to the introduction of flexible segment CH 2 CH 2 CH 2 , at the end of polymer molecular weight when PAI is modified by a silane coupling agent (APTES), which increases molecular chain flexibility and decrease in thermal properties.…”

“…Consistent with the previous report, the incorporation of silicon element density could obviously reduce thermal stability of PAI 27,28 and improve the strength of polyimide or co-polyimide matrix. [29][30][31][32] The thermal stability of the PAIS decreases with the addition of silicon element, which may be due to the introduction of flexible segment tion, but some unreacted silicon hydroxyl groups are retained (Figure S1). As a result, the surface of the silica prepared by the solgel technology still has a hydrophilic hydroxyl group to be hydrophilic.…”

Airbrushed Polysulfone (PSF)/Hydroxyapatite (HA) Nanocomposites: Effect of the Presence of Nanoparticles on Mechanical Behavior

“…One example of thermoplastic polymer with convenient characteristics for the abovementioned applications is polysulfone, PSF. It has good thermal and chemical stability and high mechanical strength [20,21]. Besides, PSF is biocompatible and has been used for bio-related applications such as bone prosthetic material in orthopedics and implants, with promising results in animal models [22] or in dentistry applications [23].…”

Combined effects of nanoparticle and stretch‐induced orientation on crystal structure and properties of UHMWPE/TiO2 composite microporous membranes

“…[18][19][20] Among the modification methods, blending with nanoparticle has garnered great interest owing to particle stable properties. [4,[21][22][23] Nanoparticles can be employed as nucleating agents to increase crystallinity and improve membranes morphology and pore structure, leading to influence the surface properties of the membranes. [24][25][26] In the previous study, Cui et al [27] reported that the introduction of SiO 2 resulted in an increase in the nucleation density of the polymer and thus showed a benefit for permeability of the membrane.…”