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Lopes LM, Germiniani LGL, Rocha Neto JBM, Andrade PF, da Silveira GAT, Taketa TB, Gonçalves MDC, Beppu MM. Preparation and characterization of porous membranes of glucomannan and silver decorated cellulose nanocrystals for application as biomaterial. Int J Biol Macromol 2023; 250:126236. [PMID: 37562469 DOI: 10.1016/j.ijbiomac.2023.126236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 08/06/2023] [Accepted: 08/06/2023] [Indexed: 08/12/2023]
Abstract
Bacterial infection usually represents a threat in medical wound care, due to the increase in treatment complexity and the risk of antibiotic resistance. For presenting interesting characteristics for the use as biomaterial, natural polymers have been explored for this application. Among them, a promising candidate is the konjac glucomannan (KGM) with outstanding biocompatibility and biodegradability but lack of antibacterial activity. In this study, KGM was combined with silver decorated cellulose nanocrystals (CNC-Ag) to prepare membranes by using a recent reported casting-freezing method. The results highlight the potential anti-adhesive activity of the new materials against Staphylococcus aureus upon contact, without the burst release of silver nanoparticles. Furthermore, the incorporation of CNC enhanced the thermal stability of these membranes while preserving the favorable mechanical properties of the KGM-based material. These findings highlight a straightforward approach to enhance the antibacterial properties of natural polymers, which can be effectively useful in medical devices like wound dressings that typically lack such properties.
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Affiliation(s)
- Laise Maia Lopes
- University of Campinas, School of Chemical Engineering, Campinas, Brazil.
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Castro M, Nabhan SK, Sola CB, Spinelli BFB, Gonçalves MDC, Patricio FB, Gasparine AVCDS, Guedes MC, Baldanzi TDS, Pucci CM. LINFOMA CUTÂNEO DE CÉLULAS T PANICULITE SÍMILE – RELATO DE CASO. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Guedes MC, Gasparine AVCDS, Baldanzi TDS, Patricio FB, Castro M, Gonçalves MDC, Marchesini R, Azambuja AP. ALENTUZUMAB AS THIRD LINE TREATMENT IN PURE RED SERIE APLASIA - A SUCCESSFUL CASE REPORT. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Samara Ferreira Leite L, Cristina Battirola L, Caetano Escobar da Silva L, do Carmo Gonçalves M. Corrigendum: Cover Image, Volume 133, Issue 44. J Appl Polym Sci 2017. [DOI: 10.1002/app.44439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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da Silva Valter S, Costa CAR, Battirola LC, de Farias MA, Galembeck F, do Carmo Gonçalves M. Polymorphic transformation morphology of isotactic poly(1-butene)/poly(propylene-co-1-butene-co-ethylene) blends. J Polym Res 2017. [DOI: 10.1007/s10965-016-1178-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Leite LSF, Battirola LC, da Silva LCE, Gonçalves MDC. Morphological investigation of cellulose acetate/cellulose nanocrystal composites obtained by melt extrusion. J Appl Polym Sci 2016. [DOI: 10.1002/app.44201] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
| | | | | | - Maria do Carmo Gonçalves
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154 Campinas SP 13083-970 Brazil
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Andrade PF, de Faria AF, Oliveira SR, Arruda MAZ, Gonçalves MDC. Improved antibacterial activity of nanofiltration polysulfone membranes modified with silver nanoparticles. Water Res 2015; 81:333-42. [PMID: 26099831 DOI: 10.1016/j.watres.2015.05.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Revised: 04/20/2015] [Accepted: 05/01/2015] [Indexed: 05/23/2023]
Abstract
Polysulfone membranes (PSf) containing silver nanoparticles were prepared by the wet phase-inversion process. Silver nanoparticles (AgNP) were dispersed into the polymer matrix using two different methodologies. In the first one, the AgNP were synthesized and further dispersed into the polymer solution (ex situ process). In the second method, the formation of the AgNP was performed in situ. The AgNP crystalline structure in the PSf membranes was confirmed by X-ray diffraction. Field emission scanning electron microscopy images showed that the addition of AgNP in PSf membranes caused no significant changes to the finger-like morphology. When the ex situ methodology was applied, 45 nm average size AgNP were uniformly distributed in the internal pores of the membranes. However, when the AgNP were formed through the in situ process, the AgNP were uniformly and preferentially distributed on the top and bottom surfaces of the membrane. In the last case, the AgNP showed cubic morphology when present in the bottom and top surfaces, however, when inside the membrane their morphology was spherical. The cubic-like nanoparticles displayed a 38 nm average edge length. The silver ion released from the membrane during water filtration was measured using inductively coupled plasma mass spectrometry, which showed a silver leaching of approximately 2 μg L(-1). The nanocomposite membranes prepared by the in situ method exhibited a better antibacterial activity, in comparison to those prepared by ex situ, and also a decrease in 90% Escherichia coli adhered cells compared to the pristine PSf membranes. In conclusion, the in situ procedure can be considered a feasible, simple, and reproducible methodology to prepare anti-biofouling polysulfone membranes containing AgNP.
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Affiliation(s)
- Patricia Fernanda Andrade
- Institute of Chemistry, University of Campinas (UNICAMP), P. O. Box 6154, Campinas, 13083-970 SP, Brazil
| | - Andreia Fonseca de Faria
- Institute of Chemistry, University of Campinas (UNICAMP), P. O. Box 6154, Campinas, 13083-970 SP, Brazil
| | - Silvana Ruella Oliveira
- Institute of Chemistry, University of Campinas (UNICAMP), P. O. Box 6154, Campinas, 13083-970 SP, Brazil; National Institute of Science and Technology for Bioanalytics - INCTBio, PO Box 6154, Campinas, 13083-970 SP, Brazil
| | - Marco Aurélio Zezzi Arruda
- Institute of Chemistry, University of Campinas (UNICAMP), P. O. Box 6154, Campinas, 13083-970 SP, Brazil; National Institute of Science and Technology for Bioanalytics - INCTBio, PO Box 6154, Campinas, 13083-970 SP, Brazil
| | - Maria do Carmo Gonçalves
- Institute of Chemistry, University of Campinas (UNICAMP), P. O. Box 6154, Campinas, 13083-970 SP, Brazil.
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de Moraes ACM, Andrade PF, de Faria AF, Simões MB, Salomão FCCS, Barros EB, Gonçalves MDC, Alves OL. Fabrication of transparent and ultraviolet shielding composite films based on graphene oxide and cellulose acetate. Carbohydr Polym 2015; 123:217-27. [DOI: 10.1016/j.carbpol.2015.01.034] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 01/07/2015] [Accepted: 01/22/2015] [Indexed: 10/24/2022]
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Andrade PF, de Faria AF, da Silva DS, Bonacin JA, Gonçalves MDC. Structural and morphological investigations of β-cyclodextrin-coated silver nanoparticles. Colloids Surf B Biointerfaces 2014; 118:289-97. [PMID: 24780436 DOI: 10.1016/j.colsurfb.2014.03.032] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 03/01/2014] [Accepted: 03/18/2014] [Indexed: 12/20/2022]
Abstract
This paper describes the synthesis of silver nanoparticles using an aqueous silver nitrate solution in the presence of glucose as a reducing agent, sodium hydroxide as a reaction catalyst and β-CD as a stabilizer. The structure and the morphology associated to the stabilizing layer around the silver nanoparticles were investigated. Raman spectroscopy confirmed the nanoparticle surface modification by β-CD, demonstrating the interaction between the β-CD rim hydroxyl groups and the AgNP surface. Transmission electron microscopy images showed an average 28.0nm diameter pseudo-spherical nanoparticles. Apart from this, a novel characterization of the β-CD layer surrounding the nanoparticles was carried out by using complementary analytical electron microscopy based on electron spectroscopy imaging in the transmission microscope. Mapping images revealed the presence of carbon and oxygen, demonstrating the existence of a uniform and interacting β-CD layer covering the nanoparticles. The antibacterial activity was also investigated and the β-CD-coated silver nanoparticles showed a promising bactericidal activity against the microorganism Escherichia coli.
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Affiliation(s)
- Patricia Fernanda Andrade
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, Campinas, SP 13083-970, Brazil
| | - Andreia Fonseca de Faria
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, Campinas, SP 13083-970, Brazil
| | - Douglas Soares da Silva
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, Campinas, SP 13083-970, Brazil
| | - Juliano Alves Bonacin
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, Campinas, SP 13083-970, Brazil
| | - Maria do Carmo Gonçalves
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, Campinas, SP 13083-970, Brazil.
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Carastan DJ, Amurin LG, Craievich AF, Gonçalves MDC, Demarquette NR. Clay-containing block copolymer nanocomposites with aligned morphology prepared by extrusion. POLYM INT 2013. [DOI: 10.1002/pi.4480] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Danilo J. Carastan
- Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas; Universidade Federal do ABC (UFABC); Santo André SP Brazil
| | - Leice G. Amurin
- Metallurgical and Materials Engineering Department, Escola Politécnica; University of São Paulo (USP); Av. Prof. Mello Moraes 2463, Cidade Universitária São Paulo SP Brazil 05508-030
| | - Aldo F. Craievich
- Department of Applied Physics, Institute of Physics; University of São Paulo (USP); São Paulo SP Brazil
| | | | - Nicole R. Demarquette
- Metallurgical and Materials Engineering Department, Escola Politécnica; University of São Paulo (USP); Av. Prof. Mello Moraes 2463, Cidade Universitária São Paulo SP Brazil 05508-030
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Melo Jr. MA, Santos LSS, Gonçalves MDC, Nogueira AF. Preparação de nanopartículas de prata e ouro: um método simples para a introdução da nanociência em laboratório de ensino. QUIM NOVA 2012. [DOI: 10.1590/s0100-40422012000900030] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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de Lima JA, Augusto Pinotti C, Felisberti MI, do Carmo Gonçalves M. Morphology and mechanical properties of nanocomposites of cellulose acetate and organic montmorillonite prepared with different plasticizers. J Appl Polym Sci 2011. [DOI: 10.1002/app.35517] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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de Carvalho FP, Gonçalves MDC, Felisberti MI. Effect of in situ polymerization conditions of methyl methacrylate on the structural and morphological properties of poly(methyl methacrylate)/poly(acrylonitrile-g-(ethylene-co-propylene-co-diene)-g-styrene) PMMA/AES Blends. J Appl Polym Sci 2011. [DOI: 10.1002/app.35337] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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de Oliveira Junior AR, Ferrarezi MMF, Yoshida IVP, do Carmo Gonçalves M. Cellulose acetate/polysilsesquioxane composites: Thermal properties and morphological characterization by electron spectroscopy imaging. J Appl Polym Sci 2011. [DOI: 10.1002/app.34707] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Aparecida da Silva C, Maria Favaro M, Pagotto Yoshida IV, do Carmo Gonçalves M. Nanocomposites derived from cellulose acetate and highly branched alkoxysilane. J Appl Polym Sci 2011. [DOI: 10.1002/app.33974] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kaneko ML, Romero RB, Gonçalves MDC, Yoshida IV. High molar mass silicone rubber reinforced with montmorillonite clay masterbatches: Morphology and mechanical properties. Eur Polym J 2010. [DOI: 10.1016/j.eurpolymj.2010.02.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Lourenço E, Gonçalves MDC, Felisberti MI. Dynamic mechanical and morphological behavior of blends of polystyrene and poly[acrylonitrile-g-(ethylene-co-propylene-co-diene)-g-styrene] prepared byin situpolymerization of styrene. J Appl Polym Sci 2009. [DOI: 10.1002/app.30265] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Lourenço E, Gonçalves MDC, Felisberti MI. Dynamic mechanical properties and morphological structure of PS/EPDM blends prepared byin situ-polymerization of styrene. J Appl Polym Sci 2009. [DOI: 10.1002/app.29779] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Lopes CMA, Gonçalves MDC, Felisberti MI. Blends of poly(ethylene terephthalate) and low density polyethylene containing aluminium: A material obtained from packaging recycling. J Appl Polym Sci 2007. [DOI: 10.1002/app.26769] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Plivelic TS, Cassu SN, Gonçalves MDC, Torriani IL. Experiências simultâneas de espalhamento de raios X e calorimetria diferencial de varredura (SAXS/WAXD/DSC) com resolução temporal utilizando radiação síncrotron. Polímeros 2005. [DOI: 10.1590/s0104-14282005000300010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Neste trabalho apresentamos uma nova instrumentação instalada na linha de SAXS do LNLS. Este equipamento permite a realização de experimentos simultâneos e resolvidos no tempo de espalhamento de raios X a baixos e altos ângulos (SAXS/WAXD) e calorimetria diferencial de varredura (DSC). O dispositivo de DSC mostrou-se comparável a equipamentos convencionais, com taxas de variação de temperatura de até 60 °C/min e uma precisão de 0.1 °C. O uso de uma fonte de radiação síncrotron e de detetores de raios X sensíveis à posição permitiu a obtenção de dados com uma resolução temporal de 30 s. A aplicação deste arranjo experimental no estudo da cristalização isotérmica e da fusão em materiais poliméricos é mostrada para o caso da policaprolactona (PCL) e suas blendas com polietileno clorado (PCL/PECl). As experiências mostraram a formação simultânea da estrutura cristalina e da morfologia lamelar nos diferentes estágios da cristalização assim como mudanças na cinética do processo com o tratamento isotérmico e a composição da blenda. Finalmente cabe destacar que experimentos simultâneos de SAXS/WAXD/DSC permitem o estudo de distintos processos abrangendo não apenas os de cristalização, mas também a formação de colóides e géis ou as transições de fase estruturais em diversos materiais.
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Affiliation(s)
| | - Silvana N. Cassu
- Laboratório Nacional de Luz Síncrotron; Centro Técnico Aeroespacial
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