{"id":14274,"date":"2006-08-24T00:00:00","date_gmt":"2006-08-23T22:00:00","guid":{"rendered":"http:\/\/www.bio-based.eu\/news\/index.php?startid=20060824-07n"},"modified":"2006-08-24T00:00:00","modified_gmt":"2006-08-23T22:00:00","slug":"surface-modification-polymerization-technique-yields-superhydrophobic-cellulose-surfaces","status":"publish","type":"post","link":"https:\/\/renewable-carbon.eu\/news\/surface-modification-polymerization-technique-yields-superhydrophobic-cellulose-surfaces\/","title":{"rendered":"Surface Modification: Polymerization technique yields superhydrophobic cellulose surfaces"},"content":{"rendered":"

In work aimed at developing superhydrophobic biofiber surfaces, polymer scientists in Sweden have shown that filter paper can be turned into a water-resistant, self-cleaning material. Water droplets roll off the surface of the paper, carrying dirt with them (Chem. Commun., 2006, 3594).<\/b><\/p>\n

The research paper describes a facile way to transform a very hydrophilic substrate into an extremely hydrophobic one. “To the best of our knowledge, this is the first example of a superhydrophobic cellulose substrate,” says professor of coating technology Eva Malmstr\u00f6m, who carried out the work with colleagues at the Royal Institute of Technology, in Stockholm.<\/p>\n

Cellulose is an abundant, inexpensive, biodegradable, renewable biopolymer that exhibits good mechanical properties. But it absorbs water. The creation of superhydrophobic, self-cleaning, cellulose-fiber-based materials could have potential applications in the textile industry, Malmstr\u00f6m suggests.<\/p>\n

The Swedish scientists chose filter paper as their cellulose fiber substrate because of its high surface roughness. They used a process known as atom transfer radical polymerization to graft the fiber surfaces with a superhydrophobic polymer layer.<\/p>\n

The team first immobilized a polymerization initiator, 2-bromoisobutyryl bromide, on the substrate. They then grafted glycidyl methacrylate, an epoxide monomer, onto the surface. After ring-opening of the epoxide groups, the resulting hydroxyl groups were reacted with pentadecafluorooctanoyl chloride. Fluorinated polymer brushes with a “graft-on-graft” architecture, as the authors call it, formed on the fiber surfaces.<\/p>\n

\"\"\/Self-cleaning water droplet removes carbon black powder from filter paper surface<\/p>\n

“The process results in a polymer layer covalently attached to the surface that is sufficiently thick to bring about the superhydrophobic character,” Malmstr\u00f6m explains. “The approach is versatile and can be conducted on a variety of organic and inorganic substrates. It might also be possible to apply the technique to pattern thin papers or other biomass-based substrates and to use it for sensor applications.”
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In work aimed at developing superhydrophobic biofiber surfaces, polymer scientists in Sweden have shown that filter paper can be turned into a water-resistant, self-cleaning material.<\/b><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","nova_meta_subtitle":"","footnotes":""},"categories":[5572],"tags":[],"supplier":[],"class_list":["post-14274","post","type-post","status-publish","format-standard","hentry","category-bio-based"],"_links":{"self":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/14274","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/comments?post=14274"}],"version-history":[{"count":0,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/14274\/revisions"}],"wp:attachment":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media?parent=14274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/categories?post=14274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/tags?post=14274"},{"taxonomy":"supplier","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/supplier?post=14274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}