Synthesis of nonlinear polymer brushes on magnetic nanoparticles as an affinity adsorbent for His-tagged xylanase purification

Magnesium Ferrite/Poly(cysteine methacrylate) Nanocomposites for pH-Tunable Selective Removal and Enhanced Adsorption of Indigo Carmine and Methylene Blue

“…35,36 Adsorbed water of MPSunmodified nanoparticles showed the band at ∼1630 cm −1 , an overlapping band between the MPS, and adsorbed water was observed. 29,37,38 The surface modification of the magnetic nanoparticles by MPS can be further confirmed by the bands at ∼2988, ∼2893, and ∼1299 cm −1 , corresponding to stretching and bending vibration modes of C−H bonds of the MPS. 39 Apart from the FTIR result, the successful surface modification of MgFe 2 O 4 and MgFe 2 O 4 @SiO 2 NPs by MPS was confirmed by a change of their surface properties, hydrophilicity to hydrophobicity (see Figure S3).…”

“…Before grafting PCysMA onto the surfaces of MgFe 2 O 4 and MgFe 2 O 4 @SiO 2 NPs, MPS was attached to their surfaces to form CC bonds for further polymerization reactions. In Figure b, the FTIR spectra of the MPS-modified nanoparticles (i.e., MgFe 2 O 4 –MPS and MgFe 2 O 4 @SiO 2 –MPS) showed the characteristic bands at ∼1636 and ∼1454 cm –1 assigned to CC stretching and bending vibration modes of the immobilized MPS moieties. , Adsorbed water of MPS-unmodified nanoparticles showed the band at ∼1630 cm –1 , an overlapping band between the MPS, and adsorbed water was observed. ,, The surface modification of the magnetic nanoparticles by MPS can be further confirmed by the bands at ∼2988, ∼2893, and ∼1299 cm –1 , corresponding to stretching and bending vibration modes of C–H bonds of the MPS . Apart from the FTIR result, the successful surface modification of MgFe 2 O 4 and MgFe 2 O 4 @SiO 2 NPs by MPS was confirmed by a change of their surface properties, hydrophilicity to hydrophobicity (see Figure S3).…”