Simultaneous hydrogel crosslinking and silver nanoparticle formation by using ionizing radiation to obtain antimicrobial hydrogels

Gamma Radiosynthesis of Colloidal Silver Nanoparticles Stabilized in ι-Carrageenan Under Atmospheric Gases: A Surface Plasmon Resonance Based Study

“…The broadening and redshift of resonant bands indicates the increases in particle size or agglomeration of nanoparticles. Previous researches [5,8,9] have reported that a red-shift and broadening of the dipolar resonance is observed in large particles along with the appearance of higher-order of SPR modes due to radiative losses. When dimension of AgNPs increases, light cannot polarize homogenously and the field is no longer uniform throughout the NP, which results in phase retardation effect [8,9].…”

“…Silver exhibits unique size-dependent biological, physical and chemical properties at nanoscale which differ greatly from those of bulk materials [1,2]. For therapeutic applications in biomedical field, silver nanoparticles (AgNPs) have showed potential antimicrobial [3][4][5], antioxidant [6], and anticancer [7]. The AgNPs also exhibit strong absorption band in UV-visible (UV-vis) light region due to the surface plasmon resonance (SPR) of conductive electron [8,9] for application in bioimaging and biosensor.…”

“…Previous studies about radiosynthesis AgNPs have been reported using different stabilizer such as chitin derivative [11], chitosan [4], honey [3], polyvinyl alcohol [5], and silk fibroin [12]. The use of carrageenan as a stabilizer and reducing agent have been reported by using green processing [13], but not in gamma radiosynthesis yet.…”

Research progress of radiation synthesis and application of hydrogels

“…Yang等 [12] 通过辐射诱导 交联制备了明胶/CMCts水凝胶, 该水凝胶可促进细胞 附着及成纤维细胞的生长. 另外, 由于AgNPs在伤口敷 料中具有抗炎杀菌的作用, Alcântara等 [46] 通过辐射法 制备了两种含有AgNPs的水凝胶(PVP/AgNPs和PVA/ AgNPs), 在辐照过程中, Ag + 还原形成纳米粒子, 图 13 豆苗在不含SAH水凝胶(a)及含SAH水凝胶(b)情况 下的生长情况 [11] (网络版彩图) Figure 13 The growth of bean seedlings without SAH hydrogel (a) and with SAH hydrogel (b) [11] (color online). [59] 、人造皮肤 [60,61] 、生物分子、细胞的固定 图 14 聚(NVP-co-AAP)水凝胶作为指关节(a)、手腕(b)、腿和脚(c)的固定支撑材料 [23] (网络版彩图) 图 15 Li 2 SO 4 -AG/PAM 双网络水凝胶的辐射合成及在超级 电容器中的应用 [65] (网络版彩图) Figure 15 Radiation synthesis process of the Li 2 SO 4 -AG/PAM double network hydrogel electrolytes and its application in supercapacitors [65] (color online).…”

Study on the mechanism and performance of polymer gels byTEandPVAchemical cross‐linking

“…However, pure PVA gel has poor blocking performance due to unstable gel forming time, it is necessary to add a crosslinking agent in the gel to inhibit the gel forming. 21 Nowadays, the commonly used cross-linker includes boric acid 22 (BA), borax 23 and nitrate compounds, 24 etc. Hong et al 25 used boric acid to cross-link PVA and prepared PVA/BA gel materials.…”