Bioactive and biopassive treatment of poly(ethylene terephthalate) multifilament textile yarns to improve/prevent fibroblast viability

Abstract

To modulate the physicochemical features of poly(ethylene terephthalate) (PET) multifilaments surface composing a complex textile structure (core and shell system), intended to improve upon current implants for high extension injuries of the Achilles tendon or even for its total replacement, two surface treatments with different purposes (bioactive and biopassive) were studied. The first treatment is based on amino groups grafting using ethylenediamine molecules to be applied in the structure core to improve cell adhesion and proliferation. The other treatment relates to a polytetrafluoroethylene (PTFE) coating to be applied in the structure shell to decrease its coefficient of friction and avoid adhesions. Both treatments were optimized to reach their purposed goals without harming the tensile properties of PET yarns, which were evaluated by static tensile tests. The resazurin assay and scanning electron microscopy analysis showed that the purposed goals related to fibroblast adhesion were achieved for both treatments and in the case of PTFE coating, the abrasion resistance was also improved according to the yarn-on-yarn abrasion tests.

Amination of Polymeric Braid Structures to Improve Tendon Healing: An Experimental Comparison

“…[ 37,38 ] Nevertheless, there are reports of tensile strength decrease of PET after treatment with EDA. [ 39,40 ] These findings led to the conclusion that the plasma process parameters (time, plasma pressure) and EDA immersion parameters were adequate for minimizing severe damaging events that could damage the PET braids while permitting the absorption of amine groups. On the other hand, PLA is a heat sensitive polymer and may exhibit a reduction of properties related to thermal deterioration.…”

EMI Shielding and Conductive Textiles Functionalized with (Ti,Cu) Nanomaterials for Biomedical Applications

“…Different atmospheres: (i) argon (Ar), (ii) oxygen (O 2 ), (iii) nitrogen (N 2 ), (iv) mix Ar + O 2 , or (v) mix Ar + N 2 , with high (50 W) and low (12.5 W) power energy for several exposure times (1, 3, 5, 15 min) were tested on the activation of both 39F and 62I textiles knits . The textile surfaces’ affinity toward the thin films to be sputtered was evaluated, immediately after the plasma treatment, by measuring the contact angle (CA) with ultrapure water, and the most promising conditions were selected. ,,, The CA was determined by the water droplet method using a CA goniometer (OCA 15, DataPhysics Instruments GmbH, Filderstadt, Germany). A minimum of 3 valid sessile drop repetitions were performed for each textile and plasma condition.…”

“…Afterward and anticipating the low surface energy and hydrophobicity of textiles, the samples were submitted to low-pressure plasma treatments just prior to the deposition. The main objective was to enhance the adhesion strength at the interface textile/thin film. ,, The activation took place in a plasma cleaner system (Zepto, Diener electronic GmbH & Co. KG, Ebhausen, Germany) with a 13.56 MHz generator connected to a rotary pump working at a low base pressure of 20 Pa, while the working pressure never exceeded the 80 Pa. Different atmospheres: (i) argon (Ar), (ii) oxygen (O 2 ), (iii) nitrogen (N 2 ), (iv) mix Ar + O 2 , or (v) mix Ar + N 2 , with high (50 W) and low (12.5 W) power energy for several exposure times (1, 3, 5, 15 min) were tested on the activation of both 39F and 62I textiles knits .…”

“…21 The textile surfaces' affinity toward the thin films to be sputtered was evaluated, immediately after the plasma treatment, by measuring the contact angle (CA) with ultrapure water, and the most promising conditions were selected. 18,21,35,36 The CA was determined by the water droplet method using a CA goniometer (OCA 15, DataPhysics Instruments GmbH, Filderstadt, Germany). A minimum of 3 valid sessile drop repetitions were performed for each textile and plasma condition.…”

EMI shielding and conductive textiles functionalized with (Ti,Cu) nanomaterials for biomedical applications

“…Different atmospheres: i) Argon (Ar), ii) Oxygen (O2), iii) Nitrogen (N2), iv) mix Ar + O2 or, v) mix Ar + N2, with high (50W) and low (12.5W) power energy for several exposure times (1min, 3 min, 5 min, 15 min) were tested on the activation of both 39F and 62I textiles knits [17]. The textile surfaces' affinity towards the thin films to be sputtered was evaluated, immediately after the plasma treatment, by measuring the contact angle (CA) with ultrapure water, and the most promising conditions were selected [14,17,27,28]. The CA was determined by the water droplet method using a contact angle goniometer (OCA 15, DataPhysics Instruments GmbH, Filderstadt, Germany).…”