2425-01-6Relevant academic research and scientific papers
Epoxy thermosets from model mixtures of the lignin-to-vanillin process
Fache,Boutevin,Caillol
, p. 712 - 725 (2016/02/12)
Epoxy thermosets were prepared from mixtures of phenolics modelling the product stream of the lignin-to-vanillin process. Vanillin is one of the only mono-aromatic compounds produced on an industrial scale from lignin. This process leads to mixtures of phenolic compounds. Isolation of pure vanillin is costly both economically and environmentally. The present work demonstrates that these purification steps are not necessary in order to prepare high-performance epoxy thermosets from biomass. Model mixtures of depolymerization products of lignins from both softwood and hardwood were prepared. These mixtures were subjected in a first step to a Dakin oxidation in order to increase their phenolic functionality. In the second step, they were glycidylated to obtain mixtures of epoxy monomers. Each of the components of the mixtures was individually subjected to the same reactions to provide further insights on their reactivity. Epoxy thermosets were conveniently prepared from these epoxy monomer mixtures. These potentially bio-based epoxy thermosets displayed outstanding thermo-mechanical properties while avoiding environmentally damaging purification steps. Thus, their production could advantageously be integrated in a biorefinery as a high value added product from lignin processing.
TACN-based oligomers with aromatic backbones for efficient nucleic acid delivery
Yi, Wen-Jing,Yu, Xing-Chi,Wang, Bing,Zhang, Ji,Yu, Qing-Ying,Zhou, Xue-Dong,Yu, Xiao-Qi
supporting information, p. 6454 - 6457 (2014/06/09)
Cationic oligomers with a rigid aromatic backbone were first applied as non-viral gene delivery vectors. These materials showed better DNA condensation ability than their flexible analogues. In vitro transfection experiments revealed that the materials with more rigid backbone exhibited considerably higher TE and lower cytotoxicity than 25 kDa PEI. This journal is the Partner Organisations 2014.
Synthesis of novel poly(hydroxyether terephthalate) via polyaddition of 2,5-difluoroterephthalic acid with aromatic bis(epoxide)s
Huang, Xiao-Song,Qing, Feng-Ling
experimental part, p. 1076 - 1082 (2009/04/07)
A novel and more reliable synthetic route to 2,5-difluoroterephthalic acid was developed. A series of new poly(hydroxyether terephthalate) were prepared by the polyaddition of 2,5-difluoroterephthalic acid with various aromatic bis(epoxide)s catalyzed by tetrabutyl ammonium bromide.
