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Issue 06/2017

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bioplasticsMAGAZINE_1706

Materials polyols

Materials polyols therefore offer novel opportunities in polyurethane chemistry, e.g. high performing liquid applied optical clear adhesives (LOCA) as important technology enabler for handheld devices, optical displays, lightning applications, etc. Biconjugates/ biomimetic systems Apart from the synthesis of novel platform chemicals modern biotechnology is well known for the production of proteins and peptides with tailored amino acid sequence. Astonishing properties, like extreme selectivity (chemical site-recognition), stimuli-responsiveness or catalytic reactivity, can be obtained and explained by their complex hierarchical structure. The industrially most proliferated examples are enzymes, e.g. certain proteases that serve as key performance ingredients for detergents and cleaners, which are produced on large industrial scale. Furthermore so-called “adhesive peptides”, characterized either by almost universally strong interaction or — quite contrary — highly substrate-specific binding interaction, have been recently identified [7]. Consequently, our current research aims to utilize adhesive peptides as advanced adhesion promoters for the development of 1.) high-performing universal glues for a large variety of substrates, ranging from metals, ceramics to low-energy plastic surfaces and 2.) highly substrate selective, selfdifferentiating adhesives, that for example will only interact with one special metal alloy while neglecting other metal compositions. Despite of significant research efforts over the last decades such adhesion characteristics are so far unknown and can be seen as an emerging area of materials science. Over the last few years, bioconjugates (apart from other biomimetic systems) gained increased interest as novel class of macromolecules and advanced approach of joining specific and outstanding biological interaction capabilities with well-established polymeric advantages (processability, high strength, flexibility, chemical resistance, hydrolytic stability, scale-up, costs, etc.). Certain bioconjugation techniques are already wellknown, like PEGylating peptide or protein drugs to improve stability, solubility and immunogenicity. However, apart from life science the concept of bioconjugation has not yet developed into a mature technology with significant commercial success. Despite the prospects of innovative materials with disruptive performance characteristics and hence tremendous market differentiation intense research efforts are still required to understand and adjust the complex interactions of the individual segments. Last but not least highly efficient, selective, facile and scalable synthesis procedures are required to reduce the associated costs of bioconjugation for industrial applications like coatings, adhesives and sealants. In summary, novel advanced biobased adhesives with unique property combinations are an emerging technology with tremendous potential for future applications. Although technologically visionary they their development follows scientifically sound and clear targets. The overall requirements and perspective is likely to accompany numerous researchers over many years to follow, maybe even for generations, but shows in an impressive manner the way forward and technological possibilities of biobased adhesives in our modern world. www.henkel.com References [1] P. Kozowyk, M. Soressi, D. Pomstra, G. Langejans. „Experimental methods for the Palaeolithic dry distillation of birch bark: implications for the origin and development of Neandertal adhesive technology.“ Scientific Reports, 2017: 8033. [2]M. Carus, Nova-Institut. „Biobased Building Blocks and Polymers.“ Biobased Materials Cologne. Cologne, 2017. [3] T. Werpy, G. Petersen. Top value added Chemicals from Biomass. 2004. http://www.pnl.gov/main/publications/external/technical_ reports/PNNL-14808.pdf. [4] E4Tech, RE-CORD, WUR. „From the sugar platform to biofuels and biochemicals .“ Final report for the European Commission, 2015. [5] C. Halfmann, L. Gu, W. Gibbons, R. Zhou. „Genetically engineering cyanobacteria to convert CO2, water, and light into the long-chain hydrocarbon farnesene.“ Applied Microbiology and Biotechnology, Volume 98, Issue 23, 2014: 9869. [6] T. Yoo, S. K. Henning. „SYNTHESIS AND CHARACTERIZATION OF FARNESENE-BASED POLYMERS.“ Rubber Chemistry and Technology, Volume 90, No. 2, 2017: 308. [7] A. Taden, B. Veith, R. Breves, I. Schmidt, T. Weber. „Peptide that can be used in coating agents, adhesion promoters or adhesives for oxidic surfaces.“ EP2917740 B1, 4. Jan 2017. 32 bioplastics MAGAZINE [06/17] Vol. 12

Innovation. Technology. Sustainability. From equipment and trends to the people advancing plastics manufacturing, NPE2018: The Plastics Show has it covered. Be there to discover new ways to maximize efficiency, advance your operations and achieve success. REGISTER TODAY AT NPE.ORG MAY 7–11, 2018 | ORLANDO, FL, USA We’ve got it machined. melted. extruded. welded. compounded. blow molded. injection molded. covered. casted. fabricated. foamed. thermoformed. rotation molded. vacuum formed. cooled. heated. sealed. thermoset. packaged. transported. consumed. recycled. bioplastics MAGAZINE [06/17] Vol. 12 33

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