In-situ preparation of silver salts/collagen fiber hybrid composites and their photocatalytic and antibacterial activities

Zhou, Hu; Zhou, Jie; Wang, Taofen; Zeng, Jianxian; Liu, Lihua; Jian, Jian; Zhou, Zhi‐Hua; Zeng, Lingwei; Liu, Qingquan; Liu, Guoqing

doi:10.1016/j.jhazmat.2018.07.043

Cited by 47 publications

(18 citation statements)

References 32 publications

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“…These PCL‐related stretching modes were also observed in PCL‐Col, PCL‐Col/NAC, but the strengths of these peaks were comparatively lesser than that of those pure PCL nanofibers. PCL‐Col and PCL‐Col/NAC showed the characteristic >NH and –OH peak at 3300 cm −1 and amide I, amide II and amide III peaks of collagen at 1657 cm −1 , 1528 cm −1 , and 1300 cm −1 in addition to the characteristic peaks of PCL . It was hard to distinguish the PCL‐Col/NAC from PCL‐Col in the ATR‐FTIR spectroscopy.…”

Section: Resultsmentioning

confidence: 96%

“…PCL-Col and PCL-Col/NAC showed the characteristic >NH and -OH peak at 3300 cm −1 and amide I, amide II and amide III peaks of collagen at 1657 cm −1 , 1528 cm −1 , and 1300 cm −1 in addition to the characteristic peaks of PCL. [28][29][30] It was hard to distinguish the PCL-Col/NAC from PCL-Col in the ATR-FTIR spectroscopy. From the Raman spectroscopy, PCL-Col/NAC showed the characteristic V(CH 3 )(symmetric) and the V(CH 3 )(asymmetric) peak at 2934 cm −1 , which is regarded as the characteristic peak of NAC, representatively.…”

Section: Statistical Analysesmentioning

confidence: 99%

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Sustained release of N‐acetylcysteine by sandwich structured polycaprolactone/collagen scaffolds for wound healing

Hou

Chen

Liu

et al. 2019

J Biomedical Materials Res

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PCL (poly‐caprolactone) nanofibers have good biocompatibility and high porosity, which are usually utilized for application in wound dressings. However, wound healing could be hindered by the overproduction of reactive oxygen species (ROS) and different factors. Pure nanofibers cannot satisfy these requirements of wound healing. N‐acetylcysteine (NAC), as an antioxidant, meets the requirements for wound healing by resisting the overproduction of ROS and by promoting angiogenesis and maturation of the epidermis. In this study, we prepared a sandwich structured PCL‐Col/NAC scaffold using the molding method, which consisted of PCL nanofibers at the core and NAC‐loaded collagen on both sides. The hydroscopicity and tensile modulus of PCL‐Col/NAC scaffolds showed best performance of these properties among groups. Meanwhile, the drug release profiles of PCL‐Col/NAC scaffolds were investigated using the HPLC method and the results suggested a sustained drug release of NAC for PCL‐Col/NAC scaffolds. In addition, PCL‐Col/NAC scaffolds presented better properties than the control groups in cell migration and proliferation. The in vivo wound healing therapy effect was studied using an oval (2 × 1 cm) full‐thickness skin defect wound model for SD rats. After 21 days, gross view and histological analysis showed a favorable beneficial therapeutic effect as well as better epidermal maturation compared with the control groups. CD31 immunohistology results revealed relatively more new vessels in the PCL‐Col/NAC group than the control groups. This study developed novel PCL‐Col/NAC scaffolds with an excellent hydroscopicity, tensile modulus and the ability to promote epidermal maturation and angiogenesis, demonstrating its promising potential in wound healing treatment. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2019.

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Section: Resultsmentioning

confidence: 96%

Section: Statistical Analysesmentioning

confidence: 99%

Sustained release of N‐acetylcysteine by sandwich structured polycaprolactone/collagen scaffolds for wound healing

Hou

Chen

Liu

et al. 2019

J Biomedical Materials Res

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“…28 PA-Col and PA-Col/NAC exhibited the >NH and -OH peaks at 3300cm-1, amide I, amide II and amide III peaks at 1657 cm-1, 1528 cm-1 and 1300 cm-1, which were ascribed to the presence of collagen in the scaffolds. 29,30 In the PA, the amide peaks were obtained at the wavenumber mentioned previously. The FTIR spectrum revealed the NAC peaks as shown in Figure 2F.…”

Section: Statistical Analysesmentioning

confidence: 99%

<p>Multi-Layered Polyamide/Collagen Scaffolds with Topical Sustained Release of N-Acetylcysteine for Promoting Wound Healing</p>

Hou¹,

Chen²,

Zhou³

et al. 2020

IJN

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Background: Impaired wound healing might be associated with many issues, especially overactive of reactive oxygen species (ROS), deficiency of blood vessels and immature of epidermis. N-acetylcysteine (NAC), as an antioxidant, could solve these problems by inhibiting overreactive of ROS, promoting revascularization and accelerating re-epithelialization. How to deliver NAC in situ with a controllable releasing speed still remain a challenge. Materials and Methods: In this study, we combined collagen (Col) with N-acetylcysteine to perform the characteristics of sustained release and chemically crosslinked Col/NAC composite with polyamide (PA) nanofibers to enhance the mechanical property of collagen and fabricated this multi-layered scaffold (PA-Col/NAC scaffold). The physical properties of the scaffolds such as surface characteristics, water absorption and tensile modulus were tested. Meanwhile, the ability to promote wound healing in vitro and in vivo were investigated. Results: These scaffolds were porous and performed great water absorption. The PA-Col /NAC scaffold could sustainably release NAC for at least 14 days. After cell implantation, PA-Col/NAC scaffold showed better cell proliferation and cell migration than the other groups. In vivo, PA-Col/NAC scaffolds could promote wound healing best among all the groups. Conclusion: The multi-layered scaffolds could obviously accelerate the process of wound healing and exert better and prolonged effects.

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“…The resultant WO 3 microbowl array film showed superior electrochromic property with coloration efficiency of 68 cm 2 C −1 , response times of 3.6 s (coloration) and 1.0 s (bleaching) in comparison with the dense film prepared without a PS template. Compared with the template method, simultaneous electrodeposition of WO 3 and other nanomaterials for fabrication of composite WO 3 film is more convenient and efficient in creation of a porous structure in WO 3 film [33][34][35]. Song et al [36] reported the fabrication of porous WO 3 film by electrochemically polymerizing 3-chlorothiophene on the surface of WO 3 film in the ionic liquid 1-butyl-3-metyllimidazolium hexafluorophosphate.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Ti-Doped Hierarchically Mesoporous Silica Microspheres/Tungsten Oxide Nanocrystallines Hybrid Films and Their Electrochromic Performance

Zhang

et al. 2019

Nanomaterials

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In this paper, a novel Ti-doped hierarchically mesoporous silica microspheres/tungsten oxide (THMS/WO3) hybrid film was prepared by simultaneous electrodeposition of Ti-doped hierarchically mesoporous silica microspheres (THMSs) and WO3 nanocrystallines onto the fluoride doped tin dioxide (FTO) coated glass substrate. It is demonstrated that the incorporation of THMSs resulted in the hybrid film with improved electrochromic property. Besides, the content of THMSs plays an important role on the electrochromic property of the hybrid film. An excellent electrochromic THMS/WO3 hybrid film with good optical modulation (52.00% at 700 nm), high coloration efficiency (88.84 cm2 C−1 at 700 nm), and superior cycling stability can be prepared by keeping the weight ratio of Na2WO4·2H2O (precursor of WO3):THMSs at 15:1. The outstanding electrochromic performances of the THMS/WO3 hybrid film were mainly attributed to the porous structure, which facilitates the charge-transfer, promotes the electrolyte infiltration and alleviates the expansion of the film during Li+ insertion. This kind of porous THMS/WO3 hybrid film is promising for a wide range of applications in smart homes, green buildings, airplanes, and automobiles.

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In-situ preparation of silver salts/collagen fiber hybrid composites and their photocatalytic and antibacterial activities

Cited by 47 publications

References 32 publications

Sustained release of N‐acetylcysteine by sandwich structured polycaprolactone/collagen scaffolds for wound healing

Sustained release of N‐acetylcysteine by sandwich structured polycaprolactone/collagen scaffolds for wound healing

<p>Multi-Layered Polyamide/Collagen Scaffolds with Topical Sustained Release of N-Acetylcysteine for Promoting Wound Healing</p>

Electrodeposition of Ti-Doped Hierarchically Mesoporous Silica Microspheres/Tungsten Oxide Nanocrystallines Hybrid Films and Their Electrochromic Performance

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