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Kim D, Kim JC, Kim J, Cho YM, Yoon CH, Shin JH, Kwak HW, Choi IG. Enhancement of elongation at break and UV-protective properties of poly(lactic acid) film with cationic ring opening polymerized (CROP)-lignin. Int J Biol Macromol 2023; 253:127293. [PMID: 37806424 DOI: 10.1016/j.ijbiomac.2023.127293] [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: 08/14/2023] [Revised: 10/01/2023] [Accepted: 10/05/2023] [Indexed: 10/10/2023]
Abstract
In this study, the intrinsic brittleness of poly(lactic acid) (PLA) was overcome by chemical modification using ethyl acetate-extracted lignin (EL) via cationic ring-opening polymerization (CROP). The CROP was conducted to promote homopolymerization under starvation of the initiator (oxyrane). This method resulted in the formation of lignin-based polyether (LPE). LPE exhibited enhanced interfacial compatibility with nonpolar and hydrophobic PLA owing to the fewer hydrophilic hydroxyl groups and a long polyether chain. In addition, because of the UV-protecting and radical-scavenging abilities of lignin, LPE/PLA exhibited multifunctional properties, resulting in improved chemical properties compared with the neat PLA film. Notably, one of the LPE/PLA films (EL_MCF) exhibited excellent elongation at break of 297.7 % and toughness of 39.92 MJ/m3. Furthermore, the EL_MCF film showed superior UV-protective properties of 99.52 % in UVA and 88.95 % in UVB ranges, both significantly higher than those of the PLA film, without sacrificing significant transparency in 515 nm. In addition, the radical scavenging activity improved after adding LPE to the PLA film. These results suggest that LPEs can be used as plasticizing additives in LPE/PLA composite films, offering improved physicochemical properties.
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Affiliation(s)
- Daye Kim
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jong-Chan Kim
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jonghwa Kim
- Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Young-Min Cho
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Chae-Hwi Yoon
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jun-Ho Shin
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Hyo Won Kwak
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - In-Gyu Choi
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
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2
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Chen T, Li J, Xu J, Gao Y, Zhu S, Wang B, Ying G. Effect of Acetylation of Two Cellulose Nanocrystal Polymorphs on Processibility and Physical Properties of Polylactide/Cellulose Nanocrystal Composite Film. Molecules 2023; 28:4667. [PMID: 37375221 DOI: 10.3390/molecules28124667] [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: 05/11/2023] [Revised: 05/29/2023] [Accepted: 06/03/2023] [Indexed: 06/29/2023] Open
Abstract
Polylactide (PLA) has become a popular alternative for petroleum-based plastics to reduce environmental pollution. The broader application of PLA is hampered by its brittle nature and incompatibility with the reinforcement phase. The aim of our work was to improve the ductility and compatibility of PLA composite film and investigate the mechanism by which nanocellulose enhances PLA polymer. Here, we present a robust PLA/nanocellulose hybrid film. Two different allomorphic cellulose nanocrystals (CNC-I and CNC-III) and their acetylated products (ACNC-I and ACNC-III) were used to realize better compatibility and mechanical performance in a hydrophobic PLA matrix. The tensile stress of the composite films with 3% ACNC-I and ACNC-III increased by 41.55% and 27.22% compared to pure PLA film, respectively. Compared to the CNC-I or CNC-III enhanced PLA composite films, the tensile stress of the films increased by 45.05% with 1% ACNC-I and 56.15% with 1% ACNC-III. In addition, PLA composite films with ACNCs showed better ductility and compatibility because the composite fracture gradually transitioned to a ductile fracture during the stretching process. As a result, ACNC-I and ACNC-III were found to be excellent reinforcing agents for the enhancement of the properties of polylactide composite film, and the replacement some petrochemical plastics with PLA composites would be very promising in actual life.
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Affiliation(s)
- Tong Chen
- Plant Fiber Materials Research Center, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Jun Li
- Plant Fiber Materials Research Center, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Jun Xu
- Plant Fiber Materials Research Center, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China
| | - Yi Gao
- Plant Fiber Materials Research Center, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Shiyun Zhu
- Plant Fiber Materials Research Center, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Bin Wang
- Plant Fiber Materials Research Center, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Guangdong Ying
- Shandong Sun Paper Industry Joint Stock Co., Ltd., Jining 272100, China
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3
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Kim S, Eom T, Kang S, Seo M, Jeong YG. Sustainable and high‐performance composites based on glycidyl methacrylate‐grafted poly(lactic acid) and cellulose nanofibrils. J Appl Polym Sci 2023. [DOI: 10.1002/app.53732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Seok‐Ju Kim
- Department of Applied Organic Materials Engineering Chungnam National University Daejeon Republic of Korea
| | - Tae‐Gyeong Eom
- Department of Applied Organic Materials Engineering Chungnam National University Daejeon Republic of Korea
| | - Seokchan Kang
- Department of Applied Organic Materials Engineering Chungnam National University Daejeon Republic of Korea
| | - Minyoung Seo
- Department of Applied Organic Materials Engineering Chungnam National University Daejeon Republic of Korea
| | - Young Gyu Jeong
- Department of Applied Organic Materials Engineering Chungnam National University Daejeon Republic of Korea
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4
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Pecoraro MT, Mellinas C, Piccolella S, Garrigos MC, Pacifico S. Hemp Stem Epidermis and Cuticle: From Waste to Starter in Bio-Based Material Development. Polymers (Basel) 2022; 14:polym14142816. [PMID: 35890594 PMCID: PMC9319283 DOI: 10.3390/polym14142816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 07/01/2022] [Accepted: 07/06/2022] [Indexed: 02/06/2023] Open
Abstract
Nowadays, hemp farmers are facing an urgent problem related to plant stem disposal after seed harvesting. In this work, the commonly discarded epidermis and cuticle of hemp stems were valorized, turning them towards a sustainable recycling and reuse, contributing to the circular economy concept. Cellulose deprived of amorphous regions was obtained by a green process consisting of an ethanolic ultrasound-assisted maceration followed by mild bleaching/hydrolysis. The obtained hemp cellulose was esterified with citric acid resulting in a 1.2-fold higher crystallinity index and 34 °C lower Tg value compared to the non-functionalized hemp cellulose. Green innovative biocomposite films were developed by embedding the modified cellulose into PLA by means of an extrusion process. The structural and morphological characterization of the obtained biocomposites highlighted the functionalization and further embedment of cellulose into the PLA matrix. Attenuated Total Reflectance–Fourier Transform Infrared spectroscopy (ATR-FTIR) results suggested physical and chemical interactions between PLA and the organic filler in the biofilms, observing a homogeneous composition by Field Emission-Scanning Electron Microscopy (FESEM). Moreover, some increase in thermal stability was found for biocomposites added with 5%wt of the hemp cellulose filler. The obtained results highlighted the feasible recovery of cellulose from hemp stem parts of disposal concern, adding value to this agro-waste, and its potential application for the development of novel biocomposite films to be used in different applications.
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Affiliation(s)
- Maria Tommasina Pecoraro
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania ‘Luigi Vanvitelli’, Via Vivaldi 43, 81100 Caserta, Italy;
| | - Cristina Mellinas
- Analytical Chemistry, Nutrition and Food Sciences Department, University of Alicante, 03080 Alicante, Spain; (C.M.); (M.C.G.)
| | - Simona Piccolella
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania ‘Luigi Vanvitelli’, Via Vivaldi 43, 81100 Caserta, Italy;
- Correspondence: (S.P.); (S.P.)
| | - Maria Carmen Garrigos
- Analytical Chemistry, Nutrition and Food Sciences Department, University of Alicante, 03080 Alicante, Spain; (C.M.); (M.C.G.)
| | - Severina Pacifico
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania ‘Luigi Vanvitelli’, Via Vivaldi 43, 81100 Caserta, Italy;
- Correspondence: (S.P.); (S.P.)
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dos Santos Filho EA, Luna CBB, Siqueira DD, Ferreira EDSB, Araújo EM. Tailoring Poly(lactic acid) (PLA) Properties: Effect of the Impact Modifiers EE-g-GMA and POE-g-GMA. Polymers (Basel) 2021; 14:136. [PMID: 35012156 PMCID: PMC8747380 DOI: 10.3390/polym14010136] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/10/2021] [Accepted: 11/13/2021] [Indexed: 11/16/2022] Open
Abstract
Poly(ethylene-octene) grafted with glycidyl methacrylate (POE-g-GMA) and ethylene elastomeric grafted with glycidyl methacrylate (EE-g-GMA) were used as impact modifiers, aiming for tailoring poly(lactic acid) (PLA) properties. POE-g-GMA and EE-g-GMA was used in a proportion of 5; 7.5 and 10%, considering a good balance of properties for PLA. The PLA/POE-g-GMA and PLA/EE-g-GMA blends were processed in a twin-screw extruder and injection molded. The FTIR spectra indicated interactions between the PLA and the modifiers. The 10% addition of EE-g-GMA and POE-g-GMA promoted significant increases in impact strength, with gains of 108% and 140%, respectively. These acted as heterogeneous nucleating agents in the PLA matrix, generating a higher crystallinity degree for the blends. This impacted to keep the thermal deflection temperature (HDT) and Shore D hardness at the same level as PLA. By thermogravimetry (TG), the blends showed increased thermal stability, suggesting a stabilizing effect of the modifiers POE-g-GMA and EE-g-GMA on the PLA matrix. Scanning electron microscopy (SEM) showed dispersed POE-g-GMA and EE-g-GMA particles, as well as the presence of ligand reinforcing the systems interaction. The PLA properties can be tailored and improved by adding small concentrations of POE-g-GMA and EE-g-GMA. In light of this, new environmentally friendly and semi-biodegradable materials can be manufactured for application in the packaging industry.
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Affiliation(s)
- Edson Antonio dos Santos Filho
- Department of Materials Engineering, Federal University of Campina Grande, Campina Grande 58429-900, Brazil; (C.B.B.L.); (D.D.S.); (E.d.S.B.F.); (E.M.A.)
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6
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Glycidyl methacrylate functionalized star-shaped polylactide for electron beam modification of polylactic acid: Synthesis, irradiation effects and microwave-resistant studies. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2021.109619] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Rigolin TR, Costa LC, Bettini SHP. Chemically modified poly(lactic acid): structural approach employing two distinct monomers. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02504-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Banerjee R, Ray SS. An overview of the recent advances in polylactide‐based sustainable nanocomposites. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25623] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ritima Banerjee
- Department of Chemical Engineering Calcutta Institute of Technology Howrah India
| | - Suprakas Sinha Ray
- Centre for Nanostructures and Advanced Materials, DSI‐CSIR Nanotechnology Innovation Centre Council for Scientific and Industrial Research Pretoria South Africa
- Department of Chemical Sciences University of Johannesburg Johannesburg South Africa
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9
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Li J, Tao J, Ma C, Yang J, Gu T, Liu J. Carboxylated cellulose nanofiber/montmorillonite nanocomposite for the removal of levofloxacin hydrochloride antibiotic from aqueous solutions. RSC Adv 2020; 10:42038-42053. [PMID: 35516750 PMCID: PMC9057890 DOI: 10.1039/d0ra08987g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 11/10/2020] [Indexed: 12/18/2022] Open
Abstract
Herein, we report the facile two-step synthesis of an effective carboxylated cellulose nanofiber/montmorillonite nanocomposite (CMNFs-MMT) adsorbent for levofloxacin hydrochloride (Levo-HCl). CMNFs-MMT was characterized using scanning electron microscopy, energy dispersive X-ray spectrometry, Brunauer-Emmett-Teller measurements, X-ray photoelectron spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. Based on the central composite design, the effects of various factors on the removal of Levo-HCl by the CMNFs-MMT were explored, wherein the effect of pH was the most significant. To gain a clearer perspective on the adsorption process of Levo-HCl onto CMNFs-MMT, the adsorption kinetics and isotherms were also measured, revealing that the reaction is pseudo-second-order and the Sips models provide the best fit with experimental data. Comparing the adsorption in pure water with the removal in river water, the rate of river water removal (90.37%) was slightly lower than that of pure water (93.97%) when adsorption equilibrium was reached, confirming that CMNFs-MMT is not easily influenced by environmental conditions. Reusability experiments indicate that CMNFs-MMT can maintain a certain adsorption capacity for Levo-HCl after six uses. Overall, this work indicates that CMNFs-MMT is an effective adsorbent for eliminating Levo-HCl from aqueous media in future engineering applications.
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Affiliation(s)
- Junfeng Li
- College of Water Conservancy and Architecture Engineering, Shihezi University Shihezi 832000 Xinjiang PR China
| | - Junhong Tao
- College of Water Conservancy and Architecture Engineering, Shihezi University Shihezi 832000 Xinjiang PR China
| | - Chengxiao Ma
- College of Water Conservancy and Architecture Engineering, Shihezi University Shihezi 832000 Xinjiang PR China
| | - Jie Yang
- College of Water Conservancy and Architecture Engineering, Shihezi University Shihezi 832000 Xinjiang PR China
| | - Tiantian Gu
- Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University Xinjiang 832003 PR China
| | - Jianchao Liu
- Key Laboratory of Integrated Regulation and Resources Development, College of Environment, Hohai University Nanjing 210098 China
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10
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Dehghani A, Bahlakeh G, Ramezanzadeh B. Construction of a sustainable/controlled-release nano-container of non-toxic corrosion inhibitors for the water-based siliconized film: Estimating the host-guest interactions/desorption of inclusion complexes of cerium acetylacetonate (CeA) with beta-cyclodextrin (β-CD) via detailed electronic/atomic-scale computer modeling and experimental methods. JOURNAL OF HAZARDOUS MATERIALS 2020; 399:123046. [PMID: 32540706 DOI: 10.1016/j.jhazmat.2020.123046] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/21/2020] [Accepted: 05/23/2020] [Indexed: 06/11/2023]
Abstract
Utilization of the coatings with self-healing anti-corrosion activities is one of the most promising routes for the development of advanced anti-corrosion coatings. In the present work, the green/sustainable corrosion inhibitive compounds based on the cerium acetylacetonate (CeA) was loaded into a beta-cyclodextrin (β-CD) nano-container (with negligible hazardous impacts) and through combined computer modeling and experimental approaches, the host-guest interactions/desorptions of the inclusion complexes of CeA with beta-cyclodextrin (β-CD) were assessed. The inhibition performance of the β-CD-CeA inclusion complex was investigated by electrochemical and surface experiments in a saline solution (NaCl, 3.5 wt.%). The particles were analyzed by Raman, XRD, FT-IR, and UV-vis spectroscopies. Additionally, the thermal properties in the 30-600 °C temperature range were examined by employing TGA/DTG test, and via the ICP analysis, the concentration of the released inorganic compounds in the electrolyte was studied. Achievements demonstrated 24 ppm Ce element existence after introducing β-CD-CeA inclusion complexes (during 24 h) in NaCl 3.5 wt.% solution. The analysis of Tafel curves proved that the prepared β-CD-CeA inclusion complex could inhibit the metallic substrate corrosion following the mixed cathodic and anodic mechanisms. The EIS investigation disclosed about 82 % inhibition degree after 48 h of metal immersion in the solution containing β-CD-CeA extract. The EIS analysis clarified that the silane coating (SC) resistance was enhanced noticeably by introducing the β-CD-CeA particles into the SC matrix. Using detailed-level (i.e., electronic and atomic) computer modeling techniques applying density functional theory (DFT), Mote Carlo (MC) and molecular dynamics (MD), the active sites, and the adsorption propensity of CeA complexes over the steel-based metallic adsorbents were explored. These modelings evidenced the CeA complexes interfacial adsorption on the steel.
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Affiliation(s)
- Ali Dehghani
- Department of Chemical Engineering, Faculty of Engineering, Golestan University, Aliabad Katoul, Iran
| | - Ghasem Bahlakeh
- Department of Chemical Engineering, Faculty of Engineering, Golestan University, Aliabad Katoul, Iran
| | - Bahram Ramezanzadeh
- Department of Surface Coatings and Corrosion, Institute for Color Science and Technology, P.O. Box 16765-654, Tehran, Iran.
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11
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Thermomechanical, antioxidant and moisture behaviour of PVA films in presence of citric acid esterified cellulose nanocrystals. Int J Biol Macromol 2020; 161:617-626. [DOI: 10.1016/j.ijbiomac.2020.06.082] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 06/09/2020] [Accepted: 06/09/2020] [Indexed: 11/18/2022]
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12
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Effect of Cellulose Nanocrystals and Lignin Nanoparticles on Mechanical, Antioxidant and Water Vapour Barrier Properties of Glutaraldehyde Crosslinked PVA Films. Polymers (Basel) 2020; 12:polym12061364. [PMID: 32560476 PMCID: PMC7361994 DOI: 10.3390/polym12061364] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 06/14/2020] [Accepted: 06/16/2020] [Indexed: 12/02/2022] Open
Abstract
In this work, PVA nanocomposite films containing cellulose nanocrystals (CNC) and different amounts of lignin nanoparticles (LNP), prepared via a facile solvent cast method, were crosslinked by adding glutaraldehyde (GD). The primary objective was to investigate the effects of crosslinker and bio-based nanofillers loading on thermal, mechanical, antioxidant and water barrier behaviour of PVA nanocomposite films for active food packaging. Thermogravimetric analysis showed improved thermal stability, due to the strong interactions between LNP, CNC and PVA in the presence of GD, while Wide-angle X-ray diffraction results confirmed a negative effect on crystallinity, due to enhanced crosslinking interactions between the nanofillers and PVA matrix. Meanwhile, the tensile strength of PVA-2CNC-1LNP increased from 26 for neat PVA to 35.4 MPa, without sacrificing the ductility, which could be explained by a sacrificial hydrogen bond reinforcing mechanism induced by spherical-like LNP. UV irradiation shielding effect was detected for LNP containing PVA films, also migrating ingredients from PVA nanocomposite films induced radical scavenging activity (RSA) in the produced films in presence of LNP. Furthermore, PVA-CNC-LNP films crosslinked by GD showed marked barrier ability to water vapour.
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Zheng T, Pilla S. Melt Processing of Cellulose Nanocrystal-Filled Composites: Toward Reinforcement and Foam Nucleation. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00170] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ting Zheng
- Department of Automotive Engineering, Clemson University, 4 Research Drive, Greenville, South Carolina 29607, United States
- Clemson Composites Center, Clemson University, Greenville, South Carolina 29607, United States
| | - Srikanth Pilla
- Department of Automotive Engineering, Clemson University, 4 Research Drive, Greenville, South Carolina 29607, United States
- Clemson Composites Center, Clemson University, Greenville, South Carolina 29607, United States
- Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29602, United States
- Department of Mechanical Engineering, Clemson University, Clemson, South Carolina 29602, United States
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14
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Lee JH, Park SH, Kim SH. Surface Alkylation of Cellulose Nanocrystals to Enhance Their Compatibility with Polylactide. Polymers (Basel) 2020; 12:E178. [PMID: 31936626 PMCID: PMC7022834 DOI: 10.3390/polym12010178] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 01/05/2020] [Accepted: 01/06/2020] [Indexed: 11/16/2022] Open
Abstract
Effective surface alkylation of cellulose nanocrystals (CNCs) was developed using a nucleophilic substitution reaction with an alkyl bromide to convert hydrophilic groups on the CNCs into alkyl groups and the degree of substitution was quantitatively determined. The resultant alkylated CNCs exhibited improved dispersion in a nonpolar environment and increased hydrophobicity, compared with unmodified and acetylated CNCs. Polylactide (PLA) nanocomposites reinforced with unmodified and modified CNCs were prepared by a solution casting method and the effects of reinforcement on the thermal stability, mechanical properties, morphology, and barrier properties were investigated. In addition, modeling of the mechanical properties was evaluated to simulate the modulus of the PLA nanocomposites and results were compared with the experimental values. PLA nanocomposites reinforced with alkylated CNCs exhibited superior properties in terms of thermal stability, tensile strength, Young's modulus, and barrier properties because of the uniform dispersion and strong interfacial adhesion between filler and matrix. This high performance and fully return-to-nature nanocomposite is expected to expand the utilization of CNCs from sustainable bioresources and the practical application of biodegradable plastics.
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Affiliation(s)
- Joo Hyung Lee
- Department of Organic and Nano Engineering, College of Engineering, Hanyang University, Seoul 04763, Korea;
| | | | - Seong Hun Kim
- Department of Organic and Nano Engineering, College of Engineering, Hanyang University, Seoul 04763, Korea;
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15
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Vernaez O, Neubert KJ, Kopitzky R, Kabasci S. Compatibility of Chitosan in Polymer Blends by Chemical Modification of Bio-based Polyesters. Polymers (Basel) 2019; 11:polym11121939. [PMID: 31775370 PMCID: PMC6961045 DOI: 10.3390/polym11121939] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/08/2019] [Accepted: 11/22/2019] [Indexed: 11/30/2022] Open
Abstract
For some applications of bioplastics like food packaging or medical devices, applying additives can be necessary to avoid microbial activity and hinder biofilm or fouling formation. A currently promising additive is chitosan (CS), the deacetylated form of the biogenic scaffolding material chitin. Due to its hydrophilicity, chitosan is not compatible with most of the thermoplastic bio-based polymers like poly(lactic acid) (PLA) or polyhydroxyalkanoates (PHA). In this work, compatibilization between chitosan and two selected bio-based polyesters, PLA and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), was enhanced by grafting maleic anhydride (MAH) and glycidyl methacrylate (GMA), respectively, onto polymer chains using peroxide. The success of grafting was confirmed via titration methods. The effects of grafting agent and peroxide concentrations on grafting reaction and the physical and thermal properties of the functionalized polyesters were investigated. Compounding of the functionalized polyesters with different weight portions of chitosan was accomplished in a discontinuous internal mixer by in-situ functionalization, followed by blending with chitosan. The titration method, scanning electron microscopy, DSC, FTIR and mechanical characterization of the composites showed good interfacial adhesion and suggest the formation of covalent bonds between functional groups of the polyesters and chitosan, especially for the samples functionalized with GMA. The molecular weights (Mw) of the samples showed a change in the molecular weight related to the thermal degradation of the sample. The Mw of the samples grafted with MAH are lower than those functionalized with GMA. Furthermore, integration of chitosan into non-functionalized PLA polymer matrix showed a nucleating effect, while for PHBV, the increase of crystallinity with the content of chitosan was only observed for grafted PHBV.
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Affiliation(s)
- Oscar Vernaez
- Bio-based Plastic Department, Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT, Osterfelder Straße 3, 46047 Oberhausen, Germany; (R.K.); (S.K.)
- Correspondence: ; Tel.: +49-208-8598-1548
| | - Katharina Julia Neubert
- Fakultät für Angewandte Naturwissenschaften, Technology Arts Sciences Technische Hochschule Köln, Claudiusstr. 1, 50678 Cologne, Germany;
| | - Rodion Kopitzky
- Bio-based Plastic Department, Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT, Osterfelder Straße 3, 46047 Oberhausen, Germany; (R.K.); (S.K.)
| | - Stephan Kabasci
- Bio-based Plastic Department, Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT, Osterfelder Straße 3, 46047 Oberhausen, Germany; (R.K.); (S.K.)
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16
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Aydın EB, Sezgintürk MK. A comparison between LP(GMA) and CLP(GMA) polymer composites as an immobilization matrix for biosensing applications: A model immunosensor for IL 1α. Anal Chim Acta 2019; 1077:129-139. [DOI: 10.1016/j.aca.2019.05.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/15/2019] [Accepted: 05/20/2019] [Indexed: 01/17/2023]
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Polylactide cellulose-based nanocomposites. Int J Biol Macromol 2019; 137:912-938. [DOI: 10.1016/j.ijbiomac.2019.06.205] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/19/2019] [Accepted: 06/26/2019] [Indexed: 11/17/2022]
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18
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Electron beam treatment of polylactide at elevated temperature in nitrogen atmosphere. Radiat Phys Chem Oxf Engl 1993 2019. [DOI: 10.1016/j.radphyschem.2019.02.053] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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19
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Luo W, Cheng L, Yuan C, Wu Z, Yuan G, Hou M, Chen JY, Luo C, Li W. Preparation, characterization and evaluation of cellulose nanocrystal/poly(lactic acid) in situ nanocomposite scaffolds for tissue engineering. Int J Biol Macromol 2019; 134:469-479. [PMID: 31078594 DOI: 10.1016/j.ijbiomac.2019.05.052] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 04/26/2019] [Accepted: 05/08/2019] [Indexed: 12/23/2022]
Abstract
Cellulose nanocrystal (CNC)/poly(lactic acid) (PLA) in situ nanocomposite scaffolds were fabricated by in situ polymerization of lactic acid and CNC which was directly utilized as aqueous suspension, followed by a process of thermally induced phase separation. The CNC/PLA in situ nanocomposite porous scaffolds were characterized by mechanical test, protein adsorption, hemolysis test, in vitro degradation measurement, TEM, FTIR, SEM and WAXD. Compared to the PLA scaffold, the CNC/PLA in situ nanocomposite scaffolds showed a greatly increased compression modulus, an improved hemocompatibility and protein adsorption capacity. The inclusion of CNCs boosted the in vitro degradation of the in situ nanocomposite porous scaffolds and facilitated the deposition of Ca2+, CO32-, PO43- ions in simulated body fluid. Furthermore, cell cultures were carried out on the CNC/PLA in situ nanocomposite porous scaffolds. In comparison with the PLA scaffold, the in situ nanocomposite scaffolds improved cell attachment and enhanced cell proliferation, denoting low cytotoxicity and good cytocompatibility. It can therefore be concluded that such scaffolds with excellent mechanical property, biocompatibility, biomineralization capacity and bioactivity hold great potential for bone tissue engineering.
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Affiliation(s)
- Weihua Luo
- College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China; School of Human Ecology, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Lianghao Cheng
- College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Caixia Yuan
- College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Zhiping Wu
- College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
| | - Guangming Yuan
- College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
| | - Mingxi Hou
- College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Jonathan Y Chen
- School of Human Ecology, The University of Texas at Austin, Austin, TX 78712, USA
| | - Chunyi Luo
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Wei Li
- Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
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PHBV-graft-GMA via reactive extrusion and its use in PHBV/nanocellulose crystal composites. Carbohydr Polym 2019; 205:27-34. [DOI: 10.1016/j.carbpol.2018.10.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 09/25/2018] [Accepted: 10/05/2018] [Indexed: 11/23/2022]
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21
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Recent developments in nanocellulose-based biodegradable polymers, thermoplastic polymers, and porous nanocomposites. Prog Polym Sci 2018. [DOI: 10.1016/j.progpolymsci.2018.07.008] [Citation(s) in RCA: 261] [Impact Index Per Article: 43.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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22
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Dhar P, M RK, Bhasney SM, Bhagabati P, Kumar A, Katiyar V. Sustainable Approach for Mechanical Recycling of Poly(lactic acid)/Cellulose Nanocrystal Films: Investigations on Structure–Property Relationship and Underlying Mechanism. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b02658] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Prodyut Dhar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O.
Box 16300, 0076, Aalto, Finland
| | - Rajesh Kumar M
- Department of Nanoscience and Technology, Bharathiar University, Coimbatore, 638752, Tami Nadu, India
| | - Siddharth Mohan Bhasney
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Purabi Bhagabati
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Amit Kumar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Vimal Katiyar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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Liu X, Li Y, Chu Z, Fang Y, Zheng H. Surface modification of bacterial cellulose aerogels by ARGET ATRP. J Appl Biomater Funct Mater 2018; 16:163-169. [PMID: 29618253 DOI: 10.1177/2280800018757337] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
INTRODUCTION Bacterial cellulose (BC) aerogels have received more and more attention due to their renewability, biodegradability and other excellent properties in recent years. Modification of BC aerogels using different methods would expand their applications. However, many problems exist for these modifications, such as a low grafting ratio, the larger dosage of metal catalyst required and so on. Activator regeneration by electron transfer (ARGET) for atom transfer radical polymerization (ATRP) is a novel ATRP method which could significantly reduce the amount of metal catalyst required and achieve a high grafting ratio. METHODS Novel nanostructured BC aerogels containing epoxy groups were prepared by the ARGET ATRP method. BC aerogels were functionalized with initiating sites by reaction with 2-bromoisobutyryl bromide (BiBBr), and followed by ARGET ATRP reaction with glycidyl methacrylate (GMA) which was catalyzed by copper(II) bromide (CuBr2) and N,N,N',N,'N"-pentamethyldiethylenetriamine (PMDETA), and then reduced by vitamin C. BC aerogels containing epoxy groups (BC-g-PGMA) were obtained after freeze-drying. The influence factors of the solvent ratio of N,N-dimethyl formamide (DMF)/toluene, monomer concentration, the concentration of CuBr2, the molar ratio of vitamin C (Vc)/CuBr2,reaction temperature and time on the grafting ratio were investigated. RESULTS The results showed that the optimal DMF and toluene volume ratio was 2:1, the optimal monomer and CuBr2 concentration were 2 mol/l and 1.5 mmol/l. The optimal molar ratio of PMDETA/CuBr2 and Vc/CuBr2 were 4:1 and 1:1. The optimal reaction temperature and time were 60°C and 9 h. Scanning electron microscopy (SEM) images showed that GMA was strongly adhered onto the surface and inside of the BC pellicle. CONCLUSIONS GMA was self-grown on the BC surface and achieved the high grafting ratio of 1052.7% under optimal conditions. The BC-g-PGMA aerogels containing the epoxy groups will provide wider application prospects in drug release, enzyme fixed, functional materials and other fields.
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Affiliation(s)
- Xinhua Liu
- 1 College of Textiles and Clothing, Anhui Polytechnic University, Wuhu, China.,2 Technology Public Service Platform for Textile Industry, Anhui Province, Wuhu, China
| | - Yong Li
- 1 College of Textiles and Clothing, Anhui Polytechnic University, Wuhu, China
| | - Zhaoyang Chu
- 1 College of Textiles and Clothing, Anhui Polytechnic University, Wuhu, China
| | - Yinchun Fang
- 1 College of Textiles and Clothing, Anhui Polytechnic University, Wuhu, China
| | - Hongliang Zheng
- 1 College of Textiles and Clothing, Anhui Polytechnic University, Wuhu, China
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Wang X, Jia Y, Liu Z, Miao J. Influence of the Lignin Content on the Properties of Poly(Lactic Acid)/lignin-Containing Cellulose Nanofibrils Composite Films. Polymers (Basel) 2018; 10:polym10091013. [PMID: 30960938 PMCID: PMC6403545 DOI: 10.3390/polym10091013] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 08/30/2018] [Accepted: 09/10/2018] [Indexed: 11/16/2022] Open
Abstract
Poly(lactic acid) (PLA)/lignin-containing cellulose nanofibrils (L-CNFs) composite films with different lignin contents were produced bythe solution casting method. The effect of the lignin content on the mechanical, thermal, and crystallinity properties, and PLA/LCNFs interfacial adhesion wereinvestigated by tensile tests, thermogravimetric analysis, differential scanning calorimetry (DSC), dynamic mechanical analysis, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The tensile strength and modulus of the PLA/9-LCNFs (9 wt % lignin LCNFs) composites are 37% and 61% higher than those of pure PLA, respectively. The glass transition temperature (Tg) decreases from 61.2 for pure PLA to 52.6 °C for the PLA/14-LCNFs (14 wt % lignin LCNFs) composite, and the composites have higher thermal stability below 380 °C than pure PLA. The DSC results indicate that the LCNFs, containing different lignin contents, act as a nucleating agent to increase the degree of crystallinity of PLA. The effect of the LCNFs lignin content on the PLA/LCNFs compatibility/adhesion was confirmed by the FTIR, SEM, and Tg results. Increasing the LCNFs lignin content increases the storage modulus of the PLA/LCNFs composites to a maximum for the PLA/9-LCNFs composite. This study shows that the lignin content has a considerable effect on the strength and flexibility of PLA/LCNFs composites.
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Affiliation(s)
- Xuan Wang
- College of Chemical Engineering, Xi'an University, Xi'an 710065, China.
| | - Yuan Jia
- College of Chemical Engineering, Xi'an University, Xi'an 710065, China.
| | - Zhen Liu
- College of Chemical Engineering, Xi'an University, Xi'an 710065, China.
| | - Jiaojiao Miao
- School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.
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Ghasemi S, Behrooz R, Ghasemi I. Investigating the properties of maleated poly(lactic acid) and its effect on poly(lactic acid)/cellulose nanofiber composites. JOURNAL OF POLYMER ENGINEERING 2018. [DOI: 10.1515/polyeng-2017-0059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this research, maleated poly(lactic acid) (PLA-g-MA) was manufactured by different levels of maleic anhydride (MAH). Also PLA-g-MA effects as a compatibilizer were investigated on PLA/cellulose nanofiber (CNF) composites. The grafting reaction was performed in the presence of dicumyl peroxide (DCP) as an initiator at constant level (0.2 phr) via reactive extrusion. Furthermore, the effects of four different levels of MAH (1–4 phr) were studied on the physical properties of PLA grafted films. We used the Fourier transform infrared (FTIR) and titration methods for confirmation of the grafting process. Based on the titration method, the greatest amount of yield was gained by 4 phr of MAH in grafting. Contact angle analysis shows that increasing the amount of MAH led to a decrease in the contact angle of films. Moreover, the glass transition temperature (Tg) and % crystallinity were decreased by increasing MAH content. PLA-g-MA was added to the composites in two levels of 3% and 5% in total. CNF was used at a constant level of 5%. The thermal, morphological and mechanical properties of nanocomposites were determined as a function of PLA-g-MA content using thermogravimetric analysis, heat distortion temperature (HDT) and tensile testing. All the prepared nanocomposite materials showed improvement in the mechanical and thermal properties compared to neat PLA.
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Affiliation(s)
- Somayeh Ghasemi
- Wood and Paper Science Department , Tarbiat Modares University, Imam Reza Bolv. Natural Resources Campus , Noor 46414356, Tehran , Iran
| | - Rabi Behrooz
- Wood and Paper Science Department , Tarbiat Modares University, Imam Reza Bolv. Natural Resources Campus , Noor 46414356, Tehran , Iran
| | - Ismail Ghasemi
- Plastic Department , Iran Polymer and Petrochemical Institute , Tehran , Iran
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Dufresne A. Cellulose nanomaterials as green nanoreinforcements for polymer nanocomposites. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2018; 376:20170040. [PMID: 29277738 PMCID: PMC5746555 DOI: 10.1098/rsta.2017.0040] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/12/2017] [Indexed: 05/25/2023]
Abstract
Unexpected and attractive properties can be observed when decreasing the size of a material down to the nanoscale. Cellulose is no exception to the rule. In addition, the highly reactive surface of cellulose resulting from the high density of hydroxyl groups is exacerbated at this scale. Different forms of cellulose nanomaterials, resulting from a top-down deconstruction strategy (cellulose nanocrystals, cellulose nanofibrils) or bottom-up strategy (bacterial cellulose), are potentially useful for a large number of industrial applications. These include the paper and cardboard industry, use as reinforcing filler in polymer nanocomposites, the basis for low-density foams, additives in adhesives and paints, as well as a wide variety of filtration, electronic, food, hygiene, cosmetic and medical products. This paper focuses on the use of cellulose nanomaterials as a filler for the preparation of polymer nanocomposites. Impressive mechanical properties can be obtained for these materials. They obviously depend on the type of nanomaterial used, but the crucial point is the processing technique. The emphasis is on the melt processing of such nanocomposite materials, which has not yet been properly resolved and remains a challenge.This article is part of a discussion meeting issue 'New horizons for cellulose nanotechnology'.
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Affiliation(s)
- Alain Dufresne
- University Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France
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27
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Benali S, Khelifa F, Lerari D, Mincheva R, Habibi Y, Lahem D, Debliquy M, Dubois P. Supramolecular Approach for Efficient Processing of Polylactide/Starch Nanocomposites. ACS OMEGA 2018; 3:1069-1080. [PMID: 31457949 PMCID: PMC6641242 DOI: 10.1021/acsomega.7b01465] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 12/27/2017] [Indexed: 06/10/2023]
Abstract
All-biobased and biodegradable nanocomposites consisting of poly(l-lactide) (PLLA) and starch nanoplatelets (SNPs) were prepared via a new strategy involving supramolecular chemistry, i.e., stereocomplexation and hydrogen-bonding interactions. For this purpose, a poly(d-lactide)-b-poly(glycidyl methacrylate) block copolymer (PDLA-b-PGMA) was first synthesized via the combination of ring-opening polymerization and atom-transfer radical polymerization. NMR spectroscopy and size-exclusion chromatography analysis confirmed a complete control over the copolymer synthesis. The SNPs were then mixed up with the copolymer for producing a PDLA-b-PGMA/SNPs masterbatch. The masterbatch was processed by solvent casting for which a particular attention was given to the solvent selection to preserve SNPs morphology as evidenced by transmission electron microscopy. Near-infrared spectroscopy was used to highlight the copolymer-SNPs supramolecular interactions mostly via hydrogen bonding. The prepared masterbatch was melt-blended with virgin PLLA and then thin films of PLLA/PDLA-b-PGMA/SNPs nanocomposites (ca. 600 μm) were melt-processed by compression molding. The resulting nanocomposite films were deeply characterized by thermogravimetric analysis and differential scanning calorimetry. Our findings suggest that supramolecular interactions based on stereocomplexation between the PLLA matrix and the PDLA block of the copolymer had a synergetic effect allowing the preservation of SNPs nanoplatelets and their morphology during melt processing. Quartz crystal microbalance and dynamic mechanical thermal analysis suggested a promising potential of the stereocomplex supramolecular approach in tuning PLLA/SNPs water vapor uptake and mechanical properties together with avoiding PLLA/SNPs degradation during melt processing.
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Affiliation(s)
- Samira Benali
- Center
of Innovation and Research in Materials and Polymers (CIRMAP), Research
Institute for Materials Science and Engineering, University of Mons (UMONS), Place du Parc 20, B-7000 Mons, Belgium
| | - Farid Khelifa
- Center
of Innovation and Research in Materials and Polymers (CIRMAP), Research
Institute for Materials Science and Engineering, University of Mons (UMONS), Place du Parc 20, B-7000 Mons, Belgium
| | - Djahida Lerari
- Centre
de recherche scientifique et technique en analyses physico-chimiques, BP 384, CP 42004 Bou-Ismail, Tipaza, Algérie
| | - Rosica Mincheva
- Center
of Innovation and Research in Materials and Polymers (CIRMAP), Research
Institute for Materials Science and Engineering, University of Mons (UMONS), Place du Parc 20, B-7000 Mons, Belgium
| | - Youssef Habibi
- Materials
Research and Technology (MRT), Luxembourg
Institute of Science and Technology (LIST), Belval Innovation Campus,5, avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
| | - Driss Lahem
- Service
de Science des Matériaux, Faculté Polytechnique de Mons, Université de Mons, Rue de l’Épargne 56, B-7000 Mons, Belgium
| | - Marc Debliquy
- Service
de Science des Matériaux, Faculté Polytechnique de Mons, Université de Mons, Rue de l’Épargne 56, B-7000 Mons, Belgium
| | - Philippe Dubois
- Center
of Innovation and Research in Materials and Polymers (CIRMAP), Research
Institute for Materials Science and Engineering, University of Mons (UMONS), Place du Parc 20, B-7000 Mons, Belgium
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Polylactide/cellulose nanocrystals: The in situ polymerization approach to improved nanocomposites. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.07.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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30
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Yang W, Fortunati E, Dominici F, Giovanale G, Mazzaglia A, Balestra G, Kenny J, Puglia D. Effect of cellulose and lignin on disintegration, antimicrobial and antioxidant properties of PLA active films. Int J Biol Macromol 2016; 89:360-8. [DOI: 10.1016/j.ijbiomac.2016.04.068] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 04/22/2016] [Accepted: 04/22/2016] [Indexed: 10/21/2022]
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31
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Fortunati E, Yang W, Luzi F, Kenny J, Torre L, Puglia D. Lignocellulosic nanostructures as reinforcement in extruded and solvent casted polymeric nanocomposites: an overview. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.04.013] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Functionalization of Cellulose Nanocrystals in Choline Lactate Ionic Liquid. MATERIALS 2016; 9:ma9070499. [PMID: 28773623 PMCID: PMC5456852 DOI: 10.3390/ma9070499] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/15/2016] [Accepted: 06/20/2016] [Indexed: 11/16/2022]
Abstract
Cellulose nanocrystals (CNCs) are valuable nanomaterials obtained from renewable resources. Their properties make them suitable for a wide range of applications, including polymer reinforcement. However, due to their highly hydrophilic character, it is necessary to modify their surface with non-polar functional groups before their incorporation into a hydrophobic polymer matrix. In this work, cellulose nanocrystals were modified using a silane coupling agent and choline lactate, an ionic liquid derived from renewable resources, as a reaction medium. Modified cellulose nanocrystals were characterized by infrared spectroscopy, showing new peaks associated to the modification performed. X-ray diffraction was used to analyze the crystalline structure of functionalized cellulose nanocrystals and to optimize the amount of silane for functionalization. Poly(lactic acid) (PLA) nanocomposites containing 1 wt % of functionalized cellulose nanocrystals were prepared. They were characterized by field-emission scanning electron microscopy (FE-SEM) and mechanical tests. The use of choline lactate as reaction media has been shown to be an alternative method for the dispersion and silanization of the cellulose nanocrystals without the addition of an external catalyst.
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Yang W, Fortunati E, Dominici F, Giovanale G, Mazzaglia A, Balestra G, Kenny J, Puglia D. Synergic effect of cellulose and lignin nanostructures in PLA based systems for food antibacterial packaging. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.04.003] [Citation(s) in RCA: 141] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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34
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Lizundia E, Fortunati E, Dominici F, Vilas JL, León LM, Armentano I, Torre L, Kenny JM. PLLA-grafted cellulose nanocrystals: Role of the CNC content and grafting on the PLA bionanocomposite film properties. Carbohydr Polym 2016; 142:105-13. [DOI: 10.1016/j.carbpol.2016.01.041] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/14/2016] [Accepted: 01/18/2016] [Indexed: 01/22/2023]
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35
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Rostami A, Nazockdast H, Karimi M. Graphene induced microstructural changes of PLA/MWCNT biodegradable nanocomposites: rheological, morphological, thermal and electrical properties. RSC Adv 2016. [DOI: 10.1039/c6ra08345e] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Investigation on the enhancement of the electrical, thermal and mechanical properties of PLA nanocomposites upon addition of functionalized CNTs and GnPs as single fillers and in the form of hybrid fillers.
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Affiliation(s)
- Amir Rostami
- Department of Polymer Engineering
- Amirkabir University of Technology
- Khuzestan
- Iran
| | - Hossein Nazockdast
- Department of Polymer Engineering and Color Technology
- Amirkabir University of Technology
- Tehran
- Iran
| | - Mohammad Karimi
- Department of Textile Engineering
- Amirkabir University of Technology
- Tehran
- Iran
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