Call to action : carbon capture coatings in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4655 (10/2019)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 209, N° 4655 (10/2019) . - p. 3-8 Titre : Call to action : carbon capture coatings Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 3-8 Note générale : Going green - Special publication from PPCJ & APCJ - October 2019 - Bibliogr. Langues : Anglais (eng) Catégories : Algues unicellulaires Dioxyde de carbone -- Absorption Dioxyde de carbone -- Capture Dioxyde de carbone -- Recyclage Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Coatings capable of adhering to surfaces routinely exposed to light can exploit a biomimetic system similar to surfaces covered with photosynthetic lichen in order to capture, fix and sequester carbon dioxide. When applied over sufficiently large amounts of surface area, such coatings are capable of rivalling naturel carbon sinks in their ability to remove excess atmospheric carbon. The coatings industry stands in a unique position to cooperatively and profitably address climate change caused by excess carbon dioxide and to do so in a timely manner geared to preventing the most damaging of predicted environmental harm. By capturing large quantities of such greenhouse gases and sequestering the captured carbon into carbohydrates, such as cellulose, these paints are capable of manufacturing useful byproducts, including some of the raw materials from which they themselves are formulated. This is the first technical description of these types of coatings. Note de contenu : - From the ocean to a flask - Out of the flask and almost a 'coating' - Super-hydrated algae gel coatings - Evidence of algae growth and longevity in gel coatings - Isolation of algae-grown cellulose from gel coatings and gravimetric analysis - Vertically scaled, algae gel coating arrays - Fig. 1 : Liquid algae cultures were grown in our lab under LED grow lights by bubbting filtered air through the mixture - Fig. 2 : Test setup to measure the rate of CO2 uptake for 50% algae cells or 50% algae cells plus latex on filter paper kept moist on top of an agar puck - Fig. 3 : CO2 uptake rates tested over a two week period for algae tells atone and 50/50 atgae cells : latex resin wet coating - Fig. 4 : MTS viability plate after incubation. Darker spots indicate more ceps are alive in the sample - Fig. 5 : MTS viability data for 2434 algae tells under different incubation conditions - Fig. 6 : Coating a prototype PET container with the carbon capture coating. A) coating components measured : algae in media, alginate and pre-hydrated xanthan gum ; B) mixing the components by hand. which starts the timing for pot tife: C) adding the liquid mixture to a PET container ; D) rotating the PET container to coat the interior and keep the coating distributed until it crosslinks into a semi-rigid film - Fig. 7 : Coated PET containers measured for CO2 uptake as a single device outdoors and a clear sleeve holding PET containers set up for measurement as a group under LED lighting - Fig. 8 : CO2 uptake measured for (grey) a coating without algae cens and (green) a coating containing the algae cells. Inset picture shows the plastic dishes coated without algae cens (white) and with 2.5% algae cells (green) - Fig. 9 : Coated array where each sleeve of PET containers contains increasing amounts of algae from teft to right : 0.5%, 1.0%. 2.5% and 5.0%. Darkening of the coatings with time is evidence of atgae health - Fig. 10 : Carbon dioxide uptake (drop in CO2 ppm with time) for the coated PET containers at various algae toading levels measured on the day the PET containers were made - Fig. 11 : Carbon dioxide uptake for the coated PET containers at 1% algae loading levet tested on 0 and 45 days after the coatings were made - Fig. 12 : Freshly made samples at 0.5, 1, 2.5 and 5% algae loading levels versus the same loading levels after 45 days of storage at room - Fig. 13 : MTS viabitity results for samples at 0.5, 1, 2.5 and 5% algae loading levels after 45 days of use show significant increases in absorbante over the coating control with no algae cells indicating living cells are still present in the old coatings - Fig. 14 : Floating cellulose pellicle produced by Gluconacetobacter hansenii after 14 days of growth in liquid media - Fig. 15 : A/B) removal of the coating from the container ; C) the algae-containing coating is sampled in triplicate for cellulose isolation ; D) cellulose isolated from coatings containing the cellulose overproducer and the wild type algae - Fig. 16 : Uncoated PET container proof of concept array at five containers per sleeve and at 15 containers per sleeve. Because of the ability to vertically scale. within the same floor space "footprint" the 10-foot-tall array contains 3x the potential coated surface area of the smaller 3-foot-tall array - Carbon capture : the materials and methods used En ligne : https://drive.google.com/file/d/1PjhYyhbvfZ2WeOAGRA8jro04XvdBMGhh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33126 [article]

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