Chemical coatings relying on the self-polymerization of catechol for retrievable vena cava filters

Abstract

After covalent conjugation with catechol, heparin and paclitaxel can be chemically coated on a Ti–Ni alloy to endow anti-thrombosis and anti-intimal hyperplasia properties, respectively.

Bioinspired by Sandcastle Worm Glue: An Underwater Reversible Adhesive Modulated by pH Environments Based on Urushiol

“…The disappearance of peaks at 3013 and 946 cm –1 (Figure c), assigned to the stretching vibrations of the unsaturated group in the side chain of UH, implies a cross-linking reaction in the side chain . The absorption peak at 2927 cm –1 increased upon the introduction of UH into the hydrogels (Figure d), corresponding to the characteristic vibration peak of C–H on the alkyl side chains of UH. , Moreover, the increased intensity of the broad peak at 3250–3350 cm –1 , assigned to the O–H stretching vibration, further indicates the successful introduction of UH into the HBU hydrogels. , …”

“…40 The absorption peak at 2927 cm −1 increased upon the introduction of UH into the hydrogels (Figure 2d), corresponding to the characteristic vibration peak of C−H on the alkyl side chains of UH. 41,42 Moreover, the increased intensity of the broad peak at 3250− 3350 cm −1 , assigned to the O−H stretching vibration, further indicates the successful introduction of UH into the HBU hydrogels. 40,43 We further analyzed the surface chemical composition of the HBU hydrogels via XPS (Figure 2e−i).…”

Recent advances in surface modification of micro- and nano-scale biomaterials with biological membranes and biomolecules

“…Quantification of surface-bound elements also can be performed, but it is challenging and rarely used. XPS analysis penetration depth is about 10 nm, limiting its use to thin coatings ( Bao et al, 2018 ). You et al examined the XPS nitrogen peak at binding energy of 400 eV to confirm surface coating of exosomes on PLGA cores mediated by polydopamine ( You et al, 2020 ).…”