Oils, and Polysaccharides Alessandro Gandini,*,†,‡ Talita M. Lacerda,†,‡ Antonio J. F. Carvalho,‡ and Eliane Trovatti†,‡ †Saõ Carlos Institute of Chemistry, University of Saõ Paulo, Avenida Trabalhador Saõ-carlense 400, CEP 13566-590, Saõ Carlos, Saõ Paulo, Brazil ‡Department of Materials Engineering, Saõ Carlos School of Engineering, University of Saõ Paulo, Avenida Joaõ Dagnone 1100, CEP 13563-120, Saõ Carlos, Saõ Paulo, Brazil

Progress of Polymers from Renewable Resources: Furans, Vegetable Oils, and Polysaccharides

https://pubs.rsc.org/en/content/articlepdf/2015/py/c5py90124c

Biobased polyesters and other polymers from 2,5-furandicarboxylic acid: a tribute to furan excellency

The quest for sustainable polyesters – insights into the future

Production of bio-based 2,5-furan dicarboxylate polyesters: Recent progress and critical aspects in their synthesis and thermal properties

We report the preparation of a furan polymer, poly(2,5-furandimethylene succinate) by means of a condensation reaction between bio-based monomers. A reversible Diels–Alder reaction between furan and maleimide groups allowed the formation of network polymers cross-linked by a bismaleimide. By controlling the amount of the bismaleimide, mechanical properties were varied widely. These network polymers healed well when their broken surfaces were activated by bismaleimide solutions or solvent. The polymers also displayed excellent self-healing ability without external stimulus. This polymer class offers a wide range of possibilities to produce materials from biomass that have both practical mechanical properties and healing ability. These materials have the potential to bring great benefits to our daily lives by enhancing the safety, performance, and lifetime of products.

Bio-Based Furan Polymers with Self-Healing Ability

High Molecular Weight Poly(butylene succinate-co-butylene furandicarboxylate) Copolyesters: From Catalyzed Polycondensation Reaction to Thermomechanical Properties

Biobased poly(butylene 2,5-furandicarboxylate) and poly(butylene adipate-co- butylene 2,5-furandicarboxylate)s: From synthesis using highly purified 2,5- furandicarboxylic acid to thermo-mechanical properties

Synthesis of poly(l-lactic acid) with improved thermal stability by sulfonic acid-catalyzed melt/solid polycondensation

The invention discloses a biodegradable multiblock polymer and a preparation method thereof. The multiblock polymeris comprises 5-95wt% of a polylactic acid dimer hard segment, 5-95wt% of a copolyester soft segment and a connection segment, and can optionally comprise 0.1-2wt% of a polylactic acid crystallization nucleating agent. Firstly, a polylactic acid prepolymer is prepared by melt polycondensation of L-lactic acid in presence of an organic sulfonic acid and the optional crystallization nucleating agent; then the prepolymer is subjected to a reaction with bisoxazoline to prepare a hydroxyl-terminated polylactic acid dimer; and finally, the dimer is subjected to a reaction with copolyester diol and diisocyanate to obtain the biodegradable multiblock polymer. The biodegradable multiblock polymer has high molecular weight and excellent thermal and mechanical properties. Besides, the mechanical properties can be adjusted in an extremely wide range. The biodegradable multiblock polymer can be used for toughening polylactic acid plastics, fibers or thermoplastic elastomers. The method is simple and efficient, and is short in reaction time of each step, so that the cost of a final product is relatively low; and the method is beneficial to application and popularization.

Biodegradable multiblock polymer and preparation method thereof

The emerging contaminants removal from the environment has recently been raised concerns due to their presence in higher concentrations. Over usage of emerging contaminant such as sulfamethazine poses serious threat to the aquatic and human health as well. This study deals with rationally structured a novel BiOCl (110)/NrGO/BiVO4 heterojunction which is used to detoxify sulfamethazine (SMZ) antibiotic efficiently. The synthesised composite was well characterized and the morphological analysis evidenced the formation of heterojunction consisted of nanoplates BiOCl with dominant exposed (110) facets and leaf like BiVO4 on NrGO layers. Further results revealed that the addition of BiVO4 and NrGO tremendously increased the photocatalytic degradation efficiency of BiOCl with the rate of 96.9% (k = 0.01783 min−1) towards SMZ within 60 min of visible light irradiation. Furthermore, heterojunction energy-band theory was employed to determine the degradation mechanism of SMX in this study. The larger surface area of BiOCl and NrGO layers are believed to be the reason for higher activity which facilitates the excellent charge transfer and improved light absorption. In addition, SMZ degradation products identification was carried out by LC-ESI/MS/MS to determine the pathway of degradation. The toxicity assessment was studied using E. coli as a model microorganism through colony forming unit assay (CFU), and the results indicated a significant reduction in biotoxicity was observed in 60 min of degradation process. Thus, our work gives new methods in developing various materials that effectively treat emerging contaminants from the aqueous environment. 

Yutao Xu

Papers

High Molecular Weight Poly(butylene succinate-co-butylene furandicarboxylate) Copolyesters: From Catalyzed Polycondensation Reaction to Thermomechanical Properties

Biobased poly(butylene 2,5-furandicarboxylate) and poly(butylene adipate-co- butylene 2,5-furandicarboxylate)s: From synthesis using highly purified 2,5- furandicarboxylic acid to thermo-mechanical properties

Synthesis of poly(l-lactic acid) with improved thermal stability by sulfonic acid-catalyzed melt/solid polycondensation

Biodegradable multiblock polymer and preparation method thereof

Enhanced sulfamethazine detoxification by a novel BiOCl (110)/NrGO/BiVO4 heterojunction.