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Xue Y, Zhang T, Tian L, Feng J, Song F, Pan Z, Huang G, Zhang M, Zhou Y, Song P. How the chemical structure of phosphoramides affect the fire retardancy and mechanical properties of polylactide? Int J Biol Macromol 2024; 265:130790. [PMID: 38484818 DOI: 10.1016/j.ijbiomac.2024.130790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/24/2024] [Accepted: 03/09/2024] [Indexed: 03/17/2024]
Abstract
Phosphoramides, as a kind of high-efficient fire retardants, have been designed in many structures and endowed exceptional fire retardancy to polylactide (PLA). However, due to ignorance of the structure-property correlation, the effect of phosphoramides' structure on the fire retardancy and mechanical properties of PLA is still unclear. Herein, a series of biobased phosphoramides (phosphoramide (V1), linear polyphosphoramide (V2) and hyperbranched polyphosphamide (V3)) were designed and incorporated into PLA, and the structural effect of phosphoramides on the fire-retardant and mechanical properties of PLA was deeply researched. Among three kinds of phosphoramides, the hyperbranched polyphosphoramide is more effective than the corresponding linear polyphosphoramide and phosphoramide in improving the fire-retardant and anti-dripping properties of PLA, and only linear polyphosphoramide shows a positive effect in the mechanical strength of PLA. This work provides a feasible strategy for creating mechanically robust and fire-retardant polymer composites by molecularly tailoring the structure of fire retardants and uncovering their structure-property relationship.
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Affiliation(s)
- Yijiao Xue
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry (CAF), Nanjing 210042, China
| | - Tianchen Zhang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry (CAF), Nanjing 210042, China
| | - Linfeng Tian
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry (CAF), Nanjing 210042, China
| | - Jiabing Feng
- China-Australia Institute for Advanced Materials and Manufacturing, Jiaxing University, Jiaxing 314001, China
| | - Fei Song
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry (CAF), Nanjing 210042, China
| | - Zheng Pan
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry (CAF), Nanjing 210042, China
| | - Guobo Huang
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, China
| | - Meng Zhang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry (CAF), Nanjing 210042, China.
| | - Yonghong Zhou
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry (CAF), Nanjing 210042, China
| | - Pingan Song
- School of Agriculture and Environmental Science, Toowoomba, Qld 4300, Australia; Centre for Future Materials, University of Southern Queensland, Toowoomba, Qld 4300, Australia.
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da Silva TS, Horvath-Pereira BDO, da Silva-Júnior LN, Tenório Fireman JVB, Mattar M, Félix M, Buchaim RL, Carreira ACO, Miglino MA, Soares MM. Three-Dimensional Printing of Graphene Oxide/Poly-L-Lactic Acid Scaffolds Using Fischer-Koch Modeling. Polymers (Basel) 2023; 15:4213. [PMID: 37959893 PMCID: PMC10648465 DOI: 10.3390/polym15214213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 11/15/2023] Open
Abstract
Accurately printing customizable scaffolds is a challenging task because of the complexity of bone tissue composition, organization, and mechanical behavior. Graphene oxide (GO) and poly-L-lactic acid (PLLA) have drawn attention in the field of bone regeneration. However, as far as we know, the Fischer-Koch model of the GO/PLLA association for three-dimensional (3D) printing was not previously reported. This study characterizes the properties of GO/PLLA-printed scaffolds in order to achieve reproducibility of the trabecula, from virtual planning to the printed piece, as well as its response to a cell viability assay. Fourier-transform infrared and Raman spectroscopy were performed to evaluate the physicochemical properties of the nanocomposites. Cellular adhesion, proliferation, and growth on the nanocomposites were evaluated using scanning electron microscopy. Cell viability tests revealed no significant differences among different trabeculae and cell types, indicating that these nanocomposites were not cytotoxic. The Fischer Koch modeling yielded satisfactory results and can thus be used in studies directed at diverse medical applications, including bone tissue engineering and implants.
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Affiliation(s)
- Thamires Santos da Silva
- Departament of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo 05508-270, SP, Brazil; (T.S.d.S.); (B.d.O.H.-P.); (L.N.d.S.-J.); (J.V.B.T.F.); (A.C.O.C.); (M.A.M.)
| | - Bianca de Oliveira Horvath-Pereira
- Departament of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo 05508-270, SP, Brazil; (T.S.d.S.); (B.d.O.H.-P.); (L.N.d.S.-J.); (J.V.B.T.F.); (A.C.O.C.); (M.A.M.)
| | - Leandro Norberto da Silva-Júnior
- Departament of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo 05508-270, SP, Brazil; (T.S.d.S.); (B.d.O.H.-P.); (L.N.d.S.-J.); (J.V.B.T.F.); (A.C.O.C.); (M.A.M.)
| | - João Víctor Barbosa Tenório Fireman
- Departament of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo 05508-270, SP, Brazil; (T.S.d.S.); (B.d.O.H.-P.); (L.N.d.S.-J.); (J.V.B.T.F.); (A.C.O.C.); (M.A.M.)
| | - Michel Mattar
- Instituto de Reabilitação Oro Facial Osteogenesis S/S LTDA, Vila Olimpia 04532-060, SP, Brazil;
| | - Marcílio Félix
- Department of Animal Anatomy, University of Marilia, Mirante, Marília 17525-902, SP, Brazil;
| | - Rogerio Leone Buchaim
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru 17012-901, SP, Brazil;
| | - Ana Claudia Oliveira Carreira
- Departament of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo 05508-270, SP, Brazil; (T.S.d.S.); (B.d.O.H.-P.); (L.N.d.S.-J.); (J.V.B.T.F.); (A.C.O.C.); (M.A.M.)
- Center for Natural and Human Sciences, Federal University of ABC, Santo André 09210-580, SP, Brazil
| | - Maria Angelica Miglino
- Departament of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo 05508-270, SP, Brazil; (T.S.d.S.); (B.d.O.H.-P.); (L.N.d.S.-J.); (J.V.B.T.F.); (A.C.O.C.); (M.A.M.)
- Department of Animal Anatomy, University of Marilia, Mirante, Marília 17525-902, SP, Brazil;
| | - Marcelo Melo Soares
- Instituto de Reabilitação Oro Facial Osteogenesis S/S LTDA, Vila Olimpia 04532-060, SP, Brazil;
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Fu L, Jiang L, Xing Q, Li T, Shen Z, Dan Y, Huang Y. Studies on the effect of polylactide in-situ grafting during melt processing on poly(ʟ-lactide)/graphene oxide composite films. Int J Biol Macromol 2023; 250:126235. [PMID: 37562467 DOI: 10.1016/j.ijbiomac.2023.126235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 08/06/2023] [Accepted: 08/06/2023] [Indexed: 08/12/2023]
Abstract
The present work tried to solve the compatibility and dispersion problems of industrial grade graphene oxide (GO) mixing with polylactide (PLA) by melt processing for practical application. PLA was grafted on the GO using the silane coupling agent (KH560) as "bridge" by in-situ melting reaction to improve the compatibility. For better compatibility and dispersion, poly(ᴅ-lactide) (PDLA) was grafted on GO (D-G) to form stereocomplex crystallites with poly(ʟ-lactide) (PLLA) to enhance the interaction between GO and PLLA matrix. By biaxial stretching, the PLLA and GO composite films were prepared. Results show that GO was seriously aggregated in the film containing GO without PLA grafting (PLLA/L/G0.05) and the average size of aggregated GO was about 19.5 μm. PLA grafting decreased the aggregated GO size, so that the films containing L-G or D-G presented better dispersion. The film containing 5 % D-G (PLLA/D-G0.05) exhibited the smallest average size of aggregated GO, about 12.7 μm. Compared with neat PLLA film, PLLA/L/G0.05 film presented worse tensile properties due to serious aggregation of GO. While, PLLA/D-G0.05 film presented the best tensile performance that tensile strength and elongation at break reached 120 MPa and 107 %, respectively.
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Affiliation(s)
- Ling Fu
- State Key Laboratory of Polymer Materials Engineering of China (Sichuan University), Polymer Research Institute of Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Long Jiang
- State Key Laboratory of Polymer Materials Engineering of China (Sichuan University), Polymer Research Institute of Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Qingtao Xing
- Hainan Shiner Industrial Co., Ltd, 18 North Guangfu Road, Shiziling Industrial Park, Haikou National Hi-tech Zone, Haikou, Hainan, China
| | - Tan Li
- Hainan Shiner Industrial Co., Ltd, 18 North Guangfu Road, Shiziling Industrial Park, Haikou National Hi-tech Zone, Haikou, Hainan, China
| | - Zhiquan Shen
- Hainan Shiner Industrial Co., Ltd, 18 North Guangfu Road, Shiziling Industrial Park, Haikou National Hi-tech Zone, Haikou, Hainan, China
| | - Yi Dan
- State Key Laboratory of Polymer Materials Engineering of China (Sichuan University), Polymer Research Institute of Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu 610065, China.
| | - Yun Huang
- State Key Laboratory of Polymer Materials Engineering of China (Sichuan University), Polymer Research Institute of Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu 610065, China.
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Ke L, Yang T, Liang C, Guan X, Li T, Jiao Y, Tang D, Huang D, Li S, Zhang S, He X, Xu H. Electroactive, Antibacterial, and Biodegradable Poly(lactic acid) Nanofibrous Air Filters for Healthcare. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37378641 DOI: 10.1021/acsami.3c05834] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Poly(lactic acid) (PLA)-based nanofibrous membranes (NFMs) hold great potential in the field of biodegradable filters for air purification but are largely limited by the relatively low electret properties and high susceptibility to bacteria. Herein, we disclosed a facile approach to the fabrication of electroactive and antibacterial PLA NFMs impregnated with a highly dielectric photocatalyst. In particular, the microwave-assisted doping (MAD) protocol was employed to yield Zn-doped titanium dioxide (Zn-TIO), featuring the well-defined anatase phase, a uniform size of ∼65 nm, and decreased band gap (3.0 eV). The incorporation of Zn-TIO (2, 6, and 10 wt %) into PLA gave rise to a significant refinement of the electrospun nanofibers, decreasing from the highest diameter of 581 nm for pure PLA to the lowest value of 264 nm. More importantly, dramatical improvements in the dielectric constants, surface potential, and electret properties were simultaneously achieved for the composite NFMs, as exemplified by a nearly 94% increase in surface potential for 3-day-aged PLA/Zn-TIO (90/10) compared with that of pure PLA. The well regulation of morphological features and promotion of electroactivity contributed to a distinct increase in the air filtration performance, as demonstrated by 98.7% filtration of PM0.3 with the highest quality factor of 0.032 Pa-1 at the airflow velocity of 32 L/min for PLA/Zn-TIO (94/6), largely surpassing pure PLA (89.4%, 0.011 Pa-1). Benefiting from the effective generation of reactive radicals and gradual release of Zn2+ by Zn-TIO, the electroactive PLA NFMs were ready to profoundly inactivate Escherichia coli and Staphylococcus epidermidis. The exceptional combination of remarkable electret properties and excellent antibacterial performance makes the PLA membrane filters promising for healthcare.
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Affiliation(s)
- Lv Ke
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Ting Yang
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Chenyu Liang
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Xin Guan
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Tian Li
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Yang Jiao
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Daoyuan Tang
- Anhui Sentai WPC Group Share Co., Ltd., Guangde 242299, China
| | - Donghui Huang
- Anhui Sentai WPC Group Share Co., Ltd., Guangde 242299, China
| | - Shihang Li
- Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization, Carbon Neutrality Institute, China University of Mining and Technology, Xuzhou 221008, China
- Jiangsu Engineering Research Center of Dust Control and Occupational Protection, Xuzhou 221008, China
| | - Shenghui Zhang
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
| | - Xinjian He
- School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
- Jiangsu Engineering Research Center of Dust Control and Occupational Protection, Xuzhou 221008, China
| | - Huan Xu
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
- Jiangsu Engineering Research Center of Dust Control and Occupational Protection, Xuzhou 221008, China
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MG-63 and FetMSC Cell Response on Atomic Layer Deposited TiO2 Nanolayers Prepared Using Titanium Tetrachloride and Tetraisopropoxide. COATINGS 2022. [DOI: 10.3390/coatings12050668] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Titanium oxide nanocoatings were synthesized on the surface of monocrystalline silicon and ultra-fine-grained titanium by atomic layer deposition (ALD) using titanium tetrachloride (TiCl4) and titanium tetraisopropoxide (TTIP). The morphology of the samples was studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The structure and composition were studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), contact angle measurements, and energy-dispersive spectroscopy (EDS). The cytological response of osteosarcoma MG-63 and human fetal mesenchymal stem cells (FetMSCs) were studied by analyzing their morphology, viability, and alkaline phosphatase activity with and without the use of medium-induced differentiation in the osteogenic direction. A significant influence of the precursor type and ALD temperature on the crystal structure, morphology, composition, and surface free energy of TiO2 nanocoatings was found. The biocompatibility of amorphous non-stoichiometric and partially crystalline stoichiometric TiO2 coatings was compared. Both types of cells showed faster adhesion and improved spreading on the surface for the samples from TTIP compared to those from TiCl4 at the early stages of cultivation (2 h) due to the difference in composition and higher surface free energy. No cytotoxic effect was found on both types of coatings, nor was there a noticeable difference in cell differentiation. All ALD coatings provided excellent biocompatibility and osteoconductive properties.
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Iroegbu AC, Ray SS, Mbarane V, Bordado JC, Sardinha JP. Plastic Pollution: A Perspective on Matters Arising: Challenges and Opportunities. ACS OMEGA 2021; 6:19343-19355. [PMID: 34368521 PMCID: PMC8340096 DOI: 10.1021/acsomega.1c02760] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 07/09/2021] [Indexed: 05/13/2023]
Abstract
Plastic pollution is a persistent challenge worldwide with the first reports evidencing its impact on the living and nonliving components of the environment dating back more than half a century. The rising concerns regarding the immediate and long-term consequences of plastic matter entrainment into foods and water cannot be overemphasized in light of our pursuit of sustainability (in terms of food, water, environment, and our health). Hence, some schools of thought recommend the revisitation and continuous assessment of the plastic economy, while some call for the outright ban of plastic materials, demonstrating that plastic pollution requires, more than ever, renewed, innovative, and effective approaches for a holistic solution. In this paper, dozens of reports on various aspects of plastic pollution assessment are collated and reviewed, and the impact of plastic pollution on both the living and nonliving components of the environment is discussed. Current challenges and factors hindering efforts to mitigate plastic pollution are identified to inform the presented recommendations while underscoring, for policymakers, stakeholders, and the scientific community, the exigency of finding sustainable solutions to plastic pollution that not only encompass existing challenges but also future threats presented by plastic pollution.
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Affiliation(s)
- Austine
Ofondu Chinomso Iroegbu
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein 2028, Johannesburg, South Africa
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology
Innovation Centre, Council for Scientific
& Industrial Research, CSIR, Pretoria 0001, South Africa
| | - Suprakas Sinha Ray
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein 2028, Johannesburg, South Africa
- Centre
for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology
Innovation Centre, Council for Scientific
& Industrial Research, CSIR, Pretoria 0001, South Africa
| | - Vuyelwa Mbarane
- State
Information Technology Agency (SITA), 459 Tsitsa Street, Erasmuskloof 0048, Pretoria, South Africa
| | - João Carlos Bordado
- Centro
de Recursos Naturais e Ambiente (CERENA), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal
| | - José Paulo Sardinha
- Centro
de Recursos Naturais e Ambiente (CERENA), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal
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