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Tailor-made biopolymers from leather waste valorisation

21 Jan 2012

Scientists from Spain report tailor-made collagen biopolymers from tanning waste with diverse shapes such as fibers, films and sponges.

Mercedes Catalina (Advanced Chemistry Institute of Catalunya), Rafael Luque (University of Cordoba) and colleagues valorised tanning waste from leather processing to give biopolymers which could be easily modified using various methodologies with the aim of generating waste-derived renewable biopolymers. For example, introducing cross-linking agents on the matrix network of the biopolymer provided a material with improved properties. The authors envisage these materials could have promising in fields such as cosmetics and medicines.

This article is free to access until the 18th February 2012! Click on the link below to find out more…

Tailor-made biopolymers from leather waste valorisation, Mercedes Catalina, Jaume Cot, Alina Mariana Balu, Juan Carlos Serrano-Ruiz and Rafael Luque, Green Chem., 2012, DOI: 10.1039/C2GC16330F

You may find this review article of interest too which is also free to access. Why not take a look…

Waste materials – catalytic opportunities: an overview of the application of large scale waste materials as resources for catalytic applications, M. Balakrishnan, V. S. Batra, J. S. J. Hargreaves and I. D. Pulford, Green Chem., 2011, 13, 16-24

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Linseed and soybean oil-based polyurethanes prepared via the non-isocyanate route and catalytic carbon dioxide conversion

19 Jan 2012

Soy- and linseed oil-based polyurethanes were synthesized by curing carbonated soybean and linseed oils with different diamines.

Moritz Bähr and Rolf Mülhaupt from the Freiburg Materials Research Center (FMF) and Department of
Macromolecular Chemistry, Germany, have developed a non-isocyante route to soy- and linseed oil-based polyurethanes. The route involved conversion of the epoxidised seed oils with carbon dioxide to form cyclic carbonates catalysed by tetra-butylammonium bromide and silica supported 4-pyrrolidinopyridium iodide. The catalysts could be easily recovered without needing traditional solvent extraction. The resulting carbonates were then cured with various amines to give the polyurethanes.

As well as avoiding the use of toxic chemicals, this route also led to some polkyurethanes with increased glass transition temperatures and improved stiffness. To find out more, just click on the article link below. This article is currently free to access until the 15th February 2012!

Linseed and soybean oil-based polyurethanes prepared viathe non-isocyanate route and catalytic carbon dioxide conversion, Moritz Bähr and Rolf Mülhaupt, Green Chem., 2012, DOI: 10.1039/C2GC16230J

You may also find these articles of interest – free to access until the 15th February 2012 too! So why not take a look…

Biorenewable polyethylene terephthalate mimics derived from lignin and acetic acid, Laurent Mialon, Alexander G. Pemba and Stephen A. Miller, Green Chem., 2010, 12, 1704-1706

Vegetable oil-based polymeric materials: synthesis, properties, and applications, Ying Xia and Richard C. Larock, Green Chem., 2010, 12, 1893-1909

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Green Chemistry article in C&EN

17 Jan 2012

A recently published Green Chemistry aricle by David Cole-Hamilton (University of St. Andrews, UK), Stefan Mecking (University of Konstanz, Germany) and colleagues has just been featured in the latest issue of Chemistry & Engineering News (C&EN).

The paper reports the synthesis of the diester dimethyl 1,19-nonadecanedioate from the palladium catalysed methoxycarbonylation of various commerial oils, including olive and sunflower oils. The resulting product can then be easily converted to the diol and diacid, and all three chemicals can serve as useful polymer precursors.

This article is now free to access until the 15th February 2012! Click the link below to find out more…

Polymer precursors from catalytic reactions of natural oils, Marc R. L. Furst, Ronan Le Goff, Dorothee Quinzler, Stefan Mecking, Catherine H. Botting and David J. Cole-Hamilton, Green Chem., 2012, DOI: 10.1039/C1GC16094J

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Green Chemistry Issue 1, 2012 now online!

11 Jan 2012

Issue 1 2012 of Green Chemistry is now online!

The front cover of the issue highlights work by Graham Hutchings and colleagues from Cardiff University, UK, who prepared several Au-Pd exchanged supported Cs-heteropolyacid catalysts and applied them to the direct synthesis of hydrogen peroxide from H2 and O2 in water under ambient conditions.

The inside front cover features work by George Huber and co-workers from the University of Massachusetts-Amherst, USA and Southeast University, China, who report the catalytic fast pyrolysis of wood and alcohol mistures in a fluidized bed reactor. By looking at the various reaction parameters, the authors demonstrate that catalytic fast pyrolysis can selectively produce a mixture of compounds and that the overall yield is a function of the hydrigen to carbon effective ratio.

All articles in this issue are free to access.

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Green Chemistry issue 12 now online

05 Dec 2011

Green Chemistry issue 12 is now online!

The front cover of this issue features work by Sibudjing Kawi and W. Thitsartarn from the National University of Singapore. They report a stable and active CaO-CeO₂ catalyst, prepared by simple gel formation viaa co-precipitation method, which was applied to the transesterification of oil to biodiesel. The catalyst could be reused up to 18 times without significant loss of activity and showed only low amounts of leaching. Find out more by reading the full article ‘An active and stable CaO–CeO₂catalyst for transesterification of oil to biodiesel.’

The inside front cover highlights work from Jérôme Husson and co-workers from the Université de Franche-Comté. They report a new synthesis route to 4,4′,4′′-tricarboxy-2,2′:6′,2′′-terpyridine, a ligand that is a component of the “Black-dye” sensitizer for dye-sensitized solar cells. The route developed by Husson has a lower ecological impact with respect to atom economy, yield, solvent and chemicals used and wastes generated, compared to the previously reported method. Find out more by reading the full article ‘A more efficient synthesis of 4,4′,4′′-tricarboxy-2,2′:6′,2′′-terpyridine.’

These articles are free to access until 16th January 2012!

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Green Chemistry Issue 11 Now Online

07 Nov 2011

Green Chemistry Issue 11 is now online. The cover features work from Jairton Dupont and co-workers from the Universidade Federal do Rio Grande do Sul in Brazil. They show that a dicyclohexylguanidine group covalently attached on silica gel is an efficient basic heterogeneous catalyst for the production of biodiesel in a continuous flow reactor. Find out more by reading the full article ‘Silica-supported guanidine catalyst for continuous flow biodiesel production’.

The inside front cover highlights a paper from Alexander Bismark and colleagues at Imperial College London in which frothing of acrylated epoxidised soybean oil (AESO) followed by microwave initiated polymerisation is used to make bacterial cellulose reinforced polyAESO nanocomposite foams. The introduction of Bacterial Cellulose significantly enhanced the stability of the gas-soybean oil foam templates and enhanced the mechanical properties of the polymer nanocomposite foams. Find out more by reading the full article ‘Bio-based macroporous polymer nanocomposites made by mechanical frothing of acrylated epoxidised soybean oil’.

These cover articles are free for all to access until December 15th.

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Green Chemistry Blog

Archive for the ‘News’ Category

Tailor-made biopolymers from leather waste valorisation

Linseed and soybean oil-based polyurethanes prepared via the non-isocyanate route and catalytic carbon dioxide conversion

Green Chemistry article in C&EN

Green Chemistry Issue 1, 2012 now online!

Top ten most accessed articles in November

Top cited Green Chemistry articles from 2011

Green Chemistry issue 12 now online

Top ten most accessed articles in October

Green Chemistry Issue 11 Now Online

Top ten most accessed articles in September

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