{"id":16614,"date":"2021-03-08T10:00:27","date_gmt":"2021-03-08T15:00:27","guid":{"rendered":"https:\/\/textiles.ncsu.edu\/news\/?p=16614"},"modified":"2024-05-02T12:40:58","modified_gmt":"2024-05-02T16:40:58","slug":"bacterial-film-separates-water-from-oil","status":"publish","type":"post","link":"https:\/\/textiles.ncsu.edu\/news\/2021\/03\/bacterial-film-separates-water-from-oil\/","title":{"rendered":"Bacterial Film Separates Water From Oil"},"content":{"rendered":"\n<p>Researchers have demonstrated that a slimy, yet tough, type of biofilm that certain bacteria make for protection and to help them move around can also be used to separate water and oil. The material may be useful for applications such as cleaning contaminated waters.<\/p>\n\n\n<p>In the journal <em>Langmuir<\/em>, North Carolina State University researchers <a href=\"https:\/\/pubs.acs.org\/doi\/10.1021\/acs.langmuir.0c02717\">reported <\/a>the findings of an experiment in which they used a material produced by the bacteria <em>Gluconacetobacter hansenii<\/em> as a filter to separate water from an oil mixture.<\/p>\n\n\n<p>\u201cIt\u2019s really remarkable to think that these little bugs can make this stuff that is so perfect in many ways,\u201d said <a href=\"https:\/\/cnr.ncsu.edu\/directory\/lucian-lucia\/\">Lucian Lucia<\/a>, the study\u2019s corresponding author and an associate professor of forest biomaterials and chemistry at NC&#160;State.<\/p>\n\n\n<p>The biofilm the bacteria make and release into their environment is made of cellulose, which is the same material that gives plants a sturdy structure in their cell walls. However, when bacteria make cellulose, it has a tightly packed, crystalline structure, researchers said.<\/p>\n\n\n<p>\u201cIt\u2019s one of the purest, if not the purest, forms of cellulose out there,\u201d Lucia said. \u201cIt\u2019s very well structured. It\u2019s very water loving, and it\u2019s got a very high crystallinity, so it packs very beautifully. Once you strip out the bacteria, you have this amazingly tough material that has a real robustness, or toughness.\u201d<\/p>\n\n\n<p>The bacteria make the film to protect themselves, the researchers said.<\/p>\n\n\n<p>\u201cIf you leave something like an unwashed dish out, it can turn all slimy and gross \u2013 that\u2019s a biofilm,\u201d said study co-author <a href=\"https:\/\/textiles.ncsu.edu\/directory\/people\/wekrause\">Wendy Krause<\/a>, associate professor of textile engineering, chemistry and science at NC&#160;State. \u201cDifferent bacteria make different biofilms. The bacterial film that we\u2019re studying is made of cellulose. The bacteria are making it because they live on it and in it. They\u2019re making their home.\u201d<\/p>\n\n\n<p>In the experiment, researchers used the bacteria as factories of cellulose nano-fibers. They then removed the bacteria and their non-cellulose residue. Finally, the researchers used the cellulose membrane to see if it could separate water from a solution containing both oil and water.<\/p>\n\n\n<p>They found the material was effective at removing water, and it was sturdy.<\/p>\n\n\n<p>&nbsp;\u201cThe oil doesn\u2019t want to go through the membrane; it has a repulsive effect to it,\u201d Lucia said. \u201cIt\u2019s super fat-hating.\u201d<\/p>\n\n\n<p>\u201cIf the oil and water were highly mixed, it doesn\u2019t matter,\u201d Krause added. \u201cYou could put an immersion blender into the solution, and the membrane will still separate the water and oil.\u201d<\/p>\n\n\n<p>Researchers see a variety of potential applications for the material in situations where you need to recover water from an oily mixture \u2013 whether it be to clean water contaminated with a textile dye or for environmental remediation. In future work, the researchers want to explore how they can tailor the membrane by chemically modifying it for certain applications.<\/p>\n\n\n<p>The study, \u201cBacterial Superoleophobic Fibrous Matrices: A Naturally Occurring Liquid-Infused System for Oil-Water Separation,\u201d was published online in the journal <em>Langmuir<\/em> on Feb. 19.<\/p>\n\n\n<p class=\"has-text-align-center\">-oleniacz-<\/p>\n\n\n<p><strong>Note to editors<\/strong>: The abstract follows.<\/p>\n\n\n<p><strong>\u201cBacterial Superoleophobic Fibrous Matrices: A Naturally Occurring Liquid-Infused System for Oil-Water Separation.\u201d<\/strong><\/p>\n\n\n<p><strong>Published<\/strong> online in <em>Langmuir<\/em> on Feb. 19, 2021.<\/p>\n\n\n<p><strong>Authors<\/strong>: Zahra Ashrafi, Zimu Hu, Lucia Lucia and Wendy Krause.<\/p>\n\n\n<p><strong>DOI<\/strong>: 10.1021\/acs.langmuir.0c02717<\/p>\n\n\n<p><strong>Abstract<\/strong>: Nanocellulose fibers bioengineered by bacteria are a high performance three-dimensional cross-linked network which can confine a dispersed liquid medium such as water. The strong chemical and physical interactions of dispersed water molecules with the entangled cellulosic network allow these materials to be ideal substrates for effective liquid separation. This type of phenomenon can be characterized as green with no equivalent precedent; its performance and sustainability relative to other cellulose-based or synthetic membranes are shown herein to be superior. In this work, we demonstrated that the renewable bacterial nanocellulosic membrane can be used as a stable liquid-infused system for the development of soft surfaces with superwettability and special adhesion properties and thus address intractable issues normally encountered by solid surfaces.<\/p>\n<p><em>This post was <a href=\"https:\/\/news.ncsu.edu\/2021\/03\/bacterial-film-separates-water-from-oil\/\">originally published<\/a> in NC&#160;State News.<\/em><\/p>","protected":false,"raw":"<!-- wp:paragraph -->\n<p>Researchers have demonstrated that a slimy, yet tough, type of biofilm that certain bacteria make for protection and to help them move around can also be used to separate water and oil. The material may be useful for applications such as cleaning contaminated waters.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>In the journal <em>Langmuir<\/em>, North Carolina State University researchers <a href=\"https:\/\/pubs.acs.org\/doi\/10.1021\/acs.langmuir.0c02717\">reported <\/a>the findings of an experiment in which they used a material produced by the bacteria <em>Gluconacetobacter hansenii<\/em> as a filter to separate water from an oil mixture.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>\u201cIt\u2019s really remarkable to think that these little bugs can make this stuff that is so perfect in many ways,\u201d said <a href=\"https:\/\/cnr.ncsu.edu\/directory\/lucian-lucia\/\">Lucian Lucia<\/a>, the study\u2019s corresponding author and an associate professor of forest biomaterials and chemistry at NC State.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>The biofilm the bacteria make and release into their environment is made of cellulose, which is the same material that gives plants a sturdy structure in their cell walls. However, when bacteria make cellulose, it has a tightly packed, crystalline structure, researchers said.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>\u201cIt\u2019s one of the purest, if not the purest, forms of cellulose out there,\u201d Lucia said. \u201cIt\u2019s very well structured. It\u2019s very water loving, and it\u2019s got a very high crystallinity, so it packs very beautifully. Once you strip out the bacteria, you have this amazingly tough material that has a real robustness, or toughness.\u201d<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>The bacteria make the film to protect themselves, the researchers said.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>\u201cIf you leave something like an unwashed dish out, it can turn all slimy and gross \u2013 that\u2019s a biofilm,\u201d said study co-author <a href=\"https:\/\/textiles.ncsu.edu\/directory\/people\/wekrause\">Wendy Krause<\/a>, associate professor of textile engineering, chemistry and science at NC State. \u201cDifferent bacteria make different biofilms. The bacterial film that we\u2019re studying is made of cellulose. The bacteria are making it because they live on it and in it. They\u2019re making their home.\u201d<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>In the experiment, researchers used the bacteria as factories of cellulose nano-fibers. They then removed the bacteria and their non-cellulose residue. Finally, the researchers used the cellulose membrane to see if it could separate water from a solution containing both oil and water.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>They found the material was effective at removing water, and it was sturdy.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>&nbsp;\u201cThe oil doesn\u2019t want to go through the membrane; it has a repulsive effect to it,\u201d Lucia said. \u201cIt\u2019s super fat-hating.\u201d<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>\u201cIf the oil and water were highly mixed, it doesn\u2019t matter,\u201d Krause added. \u201cYou could put an immersion blender into the solution, and the membrane will still separate the water and oil.\u201d<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>Researchers see a variety of potential applications for the material in situations where you need to recover water from an oily mixture \u2013 whether it be to clean water contaminated with a textile dye or for environmental remediation. In future work, the researchers want to explore how they can tailor the membrane by chemically modifying it for certain applications.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>The study, \u201cBacterial Superoleophobic Fibrous Matrices: A Naturally Occurring Liquid-Infused System for Oil-Water Separation,\u201d was published online in the journal <em>Langmuir<\/em> on Feb. 19.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph {\"align\":\"center\"} -->\n<p class=\"has-text-align-center\">-oleniacz-<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>Note to editors<\/strong>: The abstract follows.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>\u201cBacterial Superoleophobic Fibrous Matrices: A Naturally Occurring Liquid-Infused System for Oil-Water Separation.\u201d<\/strong><\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>Published<\/strong> online in <em>Langmuir<\/em> on Feb. 19, 2021.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>Authors<\/strong>: Zahra Ashrafi, Zimu Hu, Lucia Lucia and Wendy Krause.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>DOI<\/strong>: 10.1021\/acs.langmuir.0c02717<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>Abstract<\/strong>: Nanocellulose fibers bioengineered by bacteria are a high performance three-dimensional cross-linked network which can confine a dispersed liquid medium such as water. The strong chemical and physical interactions of dispersed water molecules with the entangled cellulosic network allow these materials to be ideal substrates for effective liquid separation. This type of phenomenon can be characterized as green with no equivalent precedent; its performance and sustainability relative to other cellulose-based or synthetic membranes are shown herein to be superior. In this work, we demonstrated that the renewable bacterial nanocellulosic membrane can be used as a stable liquid-infused system for the development of soft surfaces with superwettability and special adhesion properties and thus address intractable issues normally encountered by solid surfaces.<\/p>\n<!-- \/wp:paragraph -->"},"excerpt":{"rendered":"<p>Researchers used a material produced by the bacteria Gluconacetobacter hansenii as a filter to separate water from an oil mixture.<\/p>\n","protected":false},"author":8,"featured_media":28150,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"source":"ncstate_wire","ncst_custom_author":"","ncst_show_custom_author":false,"ncst_dynamicHeaderBlockName":"ncst\/default-post-header","ncst_dynamicHeaderData":"{\"showAuthor\":true,\"showDate\":true,\"showFeaturedVideo\":false,\"caption\":\"\",\"displayCategoryID\":2135}","ncst_content_audit_freq":"","ncst_content_audit_date":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[512,479],"tags":[669,2327,727,964,1382],"displayCategory":null,"acf":[],"yoast_head":"<title>Bacterial Film Separates Water From Oil - Wilson College of Textiles<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/textiles.ncsu.edu\/news\/2021\/03\/bacterial-film-separates-water-from-oil\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bacterial Film Separates Water From Oil - Wilson College of Textiles\" \/>\n<meta property=\"og:description\" content=\"Researchers used a material produced by the bacteria Gluconacetobacter hansenii as a filter to separate water from an oil mixture.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/textiles.ncsu.edu\/news\/2021\/03\/bacterial-film-separates-water-from-oil\/\" \/>\n<meta property=\"og:site_name\" content=\"Wilson College of Textiles\" \/>\n<meta property=\"article:published_time\" content=\"2021-03-08T15:00:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-02T16:40:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/tex-cloud-cdn.nyc3.digitaloceanspaces.com\/textiles-ncsu\/20231108100742\/bacterial-film.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"844\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"ljolenia\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"ljolenia\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/textiles.ncsu.edu\/news\/2021\/03\/bacterial-film-separates-water-from-oil\/\",\"url\":\"https:\/\/textiles.ncsu.edu\/news\/2021\/03\/bacterial-film-separates-water-from-oil\/\",\"name\":\"Bacterial Film Separates Water From Oil - 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