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Dutta R, Baruah K, Dhar S, Ahmed A, Dutta N, Doley S, Sedai P, Dolui SK, Ray BC, Karmakar B. Removal of oils and organic solvents from wastewater through swelling of porous crosslinked poly(ethylene-co-vinyl acetate): Preparation of adsorbent and their oil removal efficiency. MARINE POLLUTION BULLETIN 2023; 186:114488. [PMID: 36563603 DOI: 10.1016/j.marpolbul.2022.114488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/30/2022] [Accepted: 12/10/2022] [Indexed: 06/17/2023]
Abstract
In this novel study, an attempt has been made to prepare porous crosslinked poly(ethylene-co-vinyl acetate) polymer (C-EVA). The porous C-EVA was prepared by grafting of maleic anhydride and cetyl alcohol onto the polymer backbone with addition of NaCl as porogen in the brabender mixture at 120 °C and 80 rpm. This was followed by leaching of NaCl with water extraction to generate a highly porous polymer structure which was evident from its SEM micrographs. The polymer was found to have excellent swelling capacity in various oils and organic solvents and showed good selective absorption capacity. The reusability of the synthesized polymer was studied and it was found that it could be reused for more than 30 absorption desorption cycles without undergoing much change in its absorption capacity. The cross-linked polymeric composite was further characterized by FTIR, TGA, XRD, and SEM.
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Affiliation(s)
- Riku Dutta
- Jadavpur University, Jadavpur, Kolkata, West Bengal 700032, India
| | | | - Sibani Dhar
- Tezpur University, Napaam, Tezpur, Assam 784028, India
| | - Asfi Ahmed
- Tezpur University, Napaam, Tezpur, Assam 784028, India
| | - Nipu Dutta
- Tezpur University, Napaam, Tezpur, Assam 784028, India
| | - Simanta Doley
- Jengraimukh College, Jengraimukh, Majuli, Assam 785105, India
| | - Pitambar Sedai
- Lokanayak Omeo Kumar Das College, Dhekiajuli, Assam 784110, India
| | - S K Dolui
- Tezpur University, Napaam, Tezpur, Assam 784028, India.
| | - B C Ray
- Jadavpur University, Jadavpur, Kolkata, West Bengal 700032, India
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Yilmaz M, Pekdemir ME, Özen Öner E. Evaluation of Pb doped Poly(lactic acid) (PLA) / Poly(ethylene glycol) (PEG) blend composites regarding physicochemical and radiation shielding properties. Radiat Phys Chem Oxf Engl 1993 2023. [DOI: 10.1016/j.radphyschem.2022.110509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ren Q, Zhu X, Li W, Wu M, Cui S, Ling Y, Ma X, Wang G, Wang L, Zheng W. Fabrication of super-hydrophilic and highly open-porous poly (lactic acid) scaffolds using supercritical carbon dioxide foaming. Int J Biol Macromol 2022; 205:740-748. [PMID: 35331790 DOI: 10.1016/j.ijbiomac.2022.03.107] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 12/21/2022]
Abstract
Porous poly (lactic acid) (PLA)-based scaffolds have been widely used as a promising product in tissue engineering. However, it is still a challenge to prepare the PLA-based scaffolds with high expansion ratio, good hydrophilicity, and excellent cytocompatibility by a green and cost-effective fabrication approach. Herein, we prepared porous PLA-based scaffolds using carbon dioxide (CO2) as the physical foaming agent. To improve the hydrophilicity and foaming behavior of PLA, poly (ethylene glycol) (PEG) was selected as a good additive to blend with PLA. It revealed that the introduction of PEG could improve the foaming behavior of PLA and promote the formation of opening cells via reducing the matrix strength of PLA. The obtained 3D PLA/PEG scaffolds exhibited high expansion ratio (9.1), high open-cell content (95.2%), and super-hydrophilicity (water contact angle 0°). Additionally, the mouse fibroblast NIH/3T3 cells with live/dead cell fluorescence staining assay was utilized to examine the biocompatibility of PLA/PEG scaffolds. The result demonstrated that the proliferation ratio of NIH/3 T3 cells on the surface of PLA/PEG scaffolds was higher than that of PLA scaffolds, indicating that the highly interconnected cell structure was conducive to cell adhesion and attachment. Consequently, such hydrophilic open-cell structure obtained by adding PEG into PLA possesses great potential for use in tissue engineering.
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Affiliation(s)
- Qian Ren
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiuyu Zhu
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang Province 315211, China
| | - Wanwan Li
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang Province 315211, China
| | - Minghui Wu
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Advanced Materials and Composites Department, University of Nottingham Ningbo China, 199 Taikang East Road, Ningbo 315000, China
| | - Shijie Cui
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang Province 315211, China
| | - Yihan Ling
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang Province 315211, China
| | - Xuehua Ma
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China; Cixi Institute of Biomedical Engineering, International Cooperation Base of Biomedical Materials Technology and Application, Ningbo Institute of Materials Technology and Engineering, CAS, Key Laboratory of Magnetic Materials and Devices and Zhejiang Engineering Research Center for Biomedical Materials, Chinese Academy of Science (CAS), Ningbo 315201, China.
| | - Guilong Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, China.
| | - Long Wang
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Wenge Zheng
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China
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Ishihara S, Hikima Y, Ohshima M. Preparation of open microcellular polylactic acid foams with a microfibrillar additive using coreback foam injection molding processes. J CELL PLAST 2018. [DOI: 10.1177/0021955x18770441] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Open microcellular polylactic acid foams with a fibrous polytetrafluoroethylene additive were prepared by a coreback foam injection molding technique. The effects of this fibrous additive on the foam cell structure were investigated. Fibrous polytetrafluoroethylene forms a network structure in polylactic acid in metering and mixing processes. The fibrous polytetrafluoroethylene network increased the viscoelasticity of polylactic acid and provided polylactic acid with a strain-hardening property. The network also provided heterogeneous bubble nucleation sites for physical foaming. However, because of the slow crystallization rate of polylactic acid, the fibrous polytetrafluoroethylene additive did not promote the nucleation of polylactic acid crystals under fast cooling conditions. During fast cooling, such as injection molding cooling conditions, the crystals induced by the fibrous polytetrafluoroethylene network could not behave as bubble nucleation sites. Thus, changes in rheological properties and the increased number of heterogeneous sites contributed to the decrease in cell size, the increase in the number density of cells and the increase in the open cell content. As the number density of cells increased, the cell walls with the fibrous polytetrafluoroethylene fibrous additive became so thin that they could be easily fibrillated by a stretching operation during the coreback operation, while their strain-hardening property prevented the walls from complete breakage. Synergistically conducting cell reduction and stretching (coreback) operations, high expansion ratio foams with high open cell content were prepared. When we adjusted the foaming temperature and holding time, five-fold expansion (i.e. 80% void ratio) foams with cell diameters less than 25 µm and open cell contents (OCC) higher than 80% were produced.
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Affiliation(s)
- Shota Ishihara
- Department of Chemical Engineering, Kyoto University, Kyoto, Japan
| | - Yuta Hikima
- Department of Chemical Engineering, Kyoto University, Kyoto, Japan
| | - Masahiro Ohshima
- Department of Chemical Engineering, Kyoto University, Kyoto, Japan
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Walallavita AS, Verbeek CJR, Lay MC. Biopolymer foams from Novatein thermoplastic protein and poly(lactic acid). J Appl Polym Sci 2017. [DOI: 10.1002/app.45561] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | - Mark Christopher Lay
- Department of Engineering; School of Science and Engineering, University of Waikato; Hamilton 3240 New Zealand
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Ren Q, Wang J, Zhai W, Lee RE. Fundamental Influences of Induced Crystallization and Phase Separation on the Foaming Behavior of Poly(lactic acid)/Polyethylene Glycol Blends Blown with Compressed CO2. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b03266] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Qian Ren
- Ningbo
Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China
| | - Jing Wang
- Ningbo
Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China
| | - Wentao Zhai
- Ningbo
Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China
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Yin HM, Qian J, Zhang J, Lin ZF, Li JS, Xu JZ, Li ZM. Engineering Porous Poly(lactic acid) Scaffolds with High Mechanical Performance via a Solid State Extrusion/Porogen Leaching Approach. Polymers (Basel) 2016; 8:E213. [PMID: 30979308 PMCID: PMC6432203 DOI: 10.3390/polym8060213] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/18/2016] [Accepted: 05/26/2016] [Indexed: 01/20/2023] Open
Abstract
A knotty issue concerning the poor mechanical properties exists in the porogen leaching approach to porous scaffolds, despite its advantage in tuning pore structure. To address this hurdle, solid state extrusion (SSE) combined with porogen leaching was utilized to engineer porous scaffolds of poly(lactic acid) (PLA). Advances introduced by poly(ethylene glycol) (PEG) caused the PLA ductile to be processed and, on the other hand, enabled the formation of interconnected pores. Thus, a well-interconnected porous architecture with high connectivity exceeding 97% and elevated porosity over 60% was obtained in the as-prepared PLA scaffolds with the composition of NaCl higher than 75.00 wt % and PEG beyond 1.25 wt %. More strikingly, the pore walls of macropores encompassed countless micropores and rough surface topography, in favor of transporting nutrients and metabolites as well as cell attachment. The prominent compressive modulus of the PLA scaffolds was in the range of 85.7⁻207.4 MPa, matching the normal modulus of human trabecular bone (50⁻250 MPa). By means of alkaline modification to improve hydrophilicity, biocompatible porous PLA scaffolds exhibited good cell attachment. These results suggest that the SSE/porogen leaching approach provides an eligible clue for fabricating porous scaffolds with high mechanical performance for use as artificial extracellular matrices.
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Affiliation(s)
- Hua-Mo Yin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jing Qian
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jin Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Zai-Fu Lin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jian-Shu Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jia-Zhuang Xu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Zhong-Ming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
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Li D, Fu D, Yen YC, Benatar A, Peng X, Chiu DY, Lee LJ. Ultrasound-assisted-pressure-induced-flow leading to superior polymer/carbon nanotube composites and foams. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.10.058] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Zhong J, Zhang H, Yan J, Gong X. Effect of nanofiber orientation of electrospun nanofibrous scaffolds on cell growth and elastin expression of muscle cells. Colloids Surf B Biointerfaces 2015; 136:772-8. [PMID: 26520049 DOI: 10.1016/j.colsurfb.2015.10.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 09/28/2015] [Accepted: 10/11/2015] [Indexed: 01/09/2023]
Abstract
Tissue regeneration after smooth muscle tissue injury is a pivotal issue in tissue engineering. Good artificial scaffolds to continuously form long thin spindle-shaped smooth muscle cells in the damaged muscle tissues are important for tissue regeneration. In this work, poly(lactide-co-glycolide) (PLGA) and poly(ϵ-caprolactone) (PCL) were used to fabricate aligned or random electrospun nanofibrous scaffolds (ENSs) by using electrospinning technique. The cell growth and elastin expression of human vascular smooth muscle cells (HVSMCs) on these membranes were analyzed. Smooth PLGA/PCL film was used as control. The experimental results showed that the aligned ENS could maintain cell shapes of HVSMCs during the culture process. During the HVSMCs proliferation process, elastin expression firstly increase due to cell proliferation, and then decrease due to elastin degradation by elastase secreted by the cells. All these results suggest that aligned PLGA/PCL ENS can be a promising candidate for cell regeneration after smooth muscle tissue injury.
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Affiliation(s)
- Jian Zhong
- College of Food Science & Technology, Shanghai Ocean University, Shanghai 201306, People's Republic of China.
| | - Huan Zhang
- Iowa State University, Ames Laboratory, Ames, IA 50010, USA
| | - Juan Yan
- College of Food Science & Technology, Shanghai Ocean University, Shanghai 201306, People's Republic of China
| | - Xiao Gong
- Department of Chemical & Petroleum Engineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
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