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An overview of bio-based polymers for packaging materials

Journal of bioresources and bioproducts 2016年第3期1卷 106-113页

作者： Yuanfeng Pan Madjid Farmahini-Farahani Perry O’Hearn Huining Xiao Helen Ocampo School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004 China Department of Chemical Engineering University of New BrunswickFrederictonNBE3B 5A3 Canada

Synthetic polymers are the most widely used materials for packaging because of their ease of processing,low cost,and low ***,many of these materials are not easily recyclable and are difficult to degrade completely in nature,creating environmental ***,there is a tendency to substitute such polymers with natural polymers and copolymers that are easily bio-degraded and less likely to cause environmental *** has been a greater interest in poly-lactic acid(PLA),poly-hydroxyalkanoates(PHAs),cellulose and starch based polymers and copolymers as the emerging biodegradable material candidates for the *** paper reviews the present state-of-the-art biodegradable polymers made from renewable resources and discusses the main features of their properties and design.

关键词： bio-based polymers environmental aspects packaging materials poly(lactic acid) cellulose

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Improvement in Toughness of Poly(ethylene 2,5-furandicarboxylate) by Melt Blending with bio-based Polyamide11 in the Presence of a Reactive Compatibilizer

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Chinese Journal of Polymer Science 2020年第10期38卷 1099-1106页

作者： Yong Yang An-Ping Tian Ya-Jin Fang Jing-Gang Wang Jin Zhu Key Laboratory of bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of Sciences Weihai Honglin Electronic Technology CO. LTD

The objective of this study was to improve the toughness of bio-based brittle poly(ethylene 2,5-furandicarboxylate)(PEF) by melt blending with bio-based polyamide11(PA11) in the presence of a reactive multifunctional epoxy compatibilizer(Joncryl ADR?-4368).The morphological,thermal,rheological,and mechanical properties of PEF/PA1 1 blends were *** with neat PEF,the toughness of PEF/PA11 blend was not improved in the absence of the reactive compatibilizer due to the poor compatibility between the two *** Joncryl was incorporated into PEF/PA1 1 blends,the interfacial tension between PEF and PA1 1 was obviously reduced,reflecting in the fine average particle size and narrow distribution of PA11 dispersed phase as observed by scanning electron microscopy(SEM).The complex viscosities of PEF/PA11 blends with Joncryl were much higher than that of PEF/PA11 blend,which could be ascribed to the formation of graft copolymers through the epoxy groups of Joncryl reacting with the end groups of PEF and PA11 molecular ***,the compatibility and interfacial adhesion between PEF and PA11 were greatly improved in the presence of *** compatibilized PEF/PA11 blend with 1.5 phr Joncryl exhibited significantly improved elongation at break and unnotch impact strength with values of 90.1% and 30.3 kJ/m2,respectively,compared with those of 3.6% and 3.8 kJ/m2for neat PEF,*** work provides an effective approach to improve the toughness of PEF which may expand its widespread application in packaging.

关键词： Poly(ethylene 2,5-furandicarboxylate) Polyamide11 bio-based polymers Reactive compatibilization Toughening

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Syntheses of Soluble biopolyimides Using 4-Aminophenylalanine

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Chinese Journal of Polymer Science 2020年第10期38卷 1117-1123,I0007页

作者： Kenji Takad Hiromasa Shinagaw Yuki Morita Manjit SGrewal Kazuya Taya Amit Kumar Tatsuo Kaneko Graduate Schoo/of Advanced Science and Technology Energy and Environment AreaJapan Advanced Institute of Science and Technology(AISTI1-1 AsahidaiNomiIshikawa923-1292Japan Marialnrganomeallics Laboratony Department ofChemisty Atma Ram Sanatan Dharma CllegeUniversity of DelhiNew Delhi-10021India

4-Aminophenylalanine(4APhe),an exotic amino acid which is obtained as a microorganism metabolite of glucose,is polycondensed with various tetracarboxylic dianhydrides as a diamine monomer to obtain poly(amic acid)*** thermal imidization of poly(amic acid)s is made at 220°C with stepwise heating from 100°*** of the obtained polyimides(PIs)exhibited good solubility in organic solvents such as N,N-dimethylformamide,N.N dimethylacetamide,and *** progress of imidization was observed by proton nuclear magnetic resonance and infrared spectroscopy to confrm that the imidization ratio was up to 98%.Carboxylate group of the side-chains of PIs affected their solubilities despite the high imidization ratio,and the solubility was lost for any organic solvents by decarboxylation at 280。C,confirmed from mass-loss of thermogravimetric ***,a new series of PIs were obtained with abilities of solvent-molding in PI state and thermal resistivityt enhancement by further heating after molding.

关键词： bio-based polymers Polyimides Amino acids 4-Aminophenylalanine Soluble polyimides

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A multi-mechanistic approach to the oil recovery study of a family of amphiphilic polysaccharides

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Petroleum Research 2024年第2期9卷 238-249页

作者： Funsho Afolabi Syed MMahmood Lunech Mario Nur Asyraf Md Akhir Bennett Tackie-Otoo Hamid Sharifigaliuk Center of Research in Enhanced Oil Recovery Universiti Teknologi PETRONASSeri IskandarMalaysia Center for Subsurface Imaging Universiti Teknologi PETRONASSeri IskandarMalaysia Research Institute of Petroleum Industry(RIPI) TehranIran

Chemical enhanced oil recovery(cEOR)remains one of the most potent tertiary recovery ***,it is expensive and rarely environmentally ***-based amphiphilic polymers have been suggested as an alternative to eradicating the challenges of conventional cEOR because of cost-effectiveness,and ***,few in-depth studies exist in the literature to investigate the prospects of these materials.A new family of amphiphilic polysaccharides was synthesized by hydrophobic modification of cellulose sulphate,and the EOR functionalities were *** novel biopolymers exhibited the ability to alter rock wetting *** terms of recovery,one of the variants of the synthesized bio amphiphilic polymer(D-I)was able to reduce residual oil saturation to 12%at harsh conditions of 60,000 ppm salinity at 75℃.Micromodel visual analysis revealed that the performance of the novel materials was due to the combination of mobility control,IFT lowering and emulsification,wettability alteration,and *** a performance commensurate to that of a commercial hydrophobically modified polymer,it can be said that the novel amphiphilic polysaccharides can stand as a viable cEOR agent for oilfield applications.

关键词： bio-based polymers Amphiphilic polysaccharides EOR Cellulose sulphate Environmental sustainability

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