{"id":7006,"date":"2024-04-09T12:16:32","date_gmt":"2024-04-09T10:16:32","guid":{"rendered":"https:\/\/www.adesiviesigillanti.it\/?page_id=7006"},"modified":"2024-04-16T17:23:44","modified_gmt":"2024-04-16T15:23:44","slug":"purdue-eng","status":"publish","type":"page","link":"https:\/\/www.adesiviesigillanti.it\/en\/archive\/archive-2024\/issue-1-2024\/purdue-eng\/","title":{"rendered":"PURDUE-ENG"},"content":{"rendered":"\t\t
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New bio-based glues from Purdue form adhesive bonds that grow stronger in water<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Gudrun Schmidt – PURDUE UNIVERSITY<\/strong><\/span><\/h5>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Patent-pending adhesive formulations developed at Purdue University from fully sustainable, bio-based components establish bonds that grow stronger when underwater or exposed to wet conditions. Gudrun Schmidt, an associate professor of practice in Purdue\u2019s Department of Chemistry, and a team of researchers developed the formulations from zein, a protein found in corn, and tannic acid. The adhesive formulations could be further developed and used in the restoration of coral reefs and have applications in the construction, manufacturing, biomedical, dental, food and cosmetic industries.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Stronger in water
<\/strong><\/span>Schmidt and her colleagues conducted underwater adhesive experiments on their formulations, using different surfaces and different waters, including seawater, saline solution, tap water and deionized water. \u201cInterestingly, the water type does not influence performance a great deal, but the substrate type does,\u201d Schmidt said. \u201cAn additional unexpected result was bond strengths increasing over time when exposed to water, contradicting general experiments of working with traditional, petroleum-based glues. Initial adhesion underwater was stronger compared to benchtop adhesion, suggesting that water helps to make the glue stick underwater.\u201d Protective skin formed on the surface of the adhesives when placed underwater, which kept water from entering the rest of the material immediately. \u201cBut once the skin was in place, it could be broken to induce faster bond formation,\u201d Schmidt said. The experiments also indicated maximum bonding at about 30 degrees Celsius, then another increase at higher temperatures. Schmidt said the process to make the adhesive formulations is a short one. \u201cWe can use inexpensive, sustainably sourced, plant-based materials to make gallons of glue within hours,\u201d Schmidt said. \u201cThe adhesives are very simple to make in the lab or outdoors, everywhere on the planet.\u201d<\/p>

The demand for nontoxic formulations
<\/strong><\/span>Schmidt said other researchers are formulating adhesives that mimic the glues used by mussels, barnacles, oysters and sandcastle worms to adhere to the seafloor and other wet surfaces. Those best-performing formulations, however, are fully synthetic. \u201cLengthy syntheses with the use of harsh chemicals may hold back their future development,\u201d Schmidt said. \u201cNontoxicity, sustainably sourced materials and minimal environmental impact are increasingly in demand. Consequently, several groups have turned to developing new and remaking old adhesive systems using bioinspired or bio-based chemistry.\u201d The increased demand of nontoxic materials has led to creating adhesives for biomedical applications. The resulting glues have properties similar to soft tissue. Schmidt said that bio-based adhesives have further applications. \u201cOnce the in vivo and biomedical realm is left behind, there is an entire world of other applications requiring metals, plastics, wood and inorganic substrates that need adhesives to work in the presence of water,\u201d Schmidt said. \u201cFood, oral and cosmetic applications are less restrictive when it comes to purity of starting materials. Food-grade polymers can often be used for making wet adhesives. We also are working on dental applications, trying to make bonds in this wet and challenging environment.\u201d
Schmidt disclosed the adhesive formulations to the Purdue Innovates Office of Technology Commercialization, which has applied for a patent to protect the intellectual property.<\/p>

DOWNLOAD THE PDF FILE<\/span><\/a><\/h5>

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SIKA<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Safe use of adhesives and sealants in industrial manufacturing<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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FEICA<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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FEICA publishes new Market Report: The European adhesives and sealants market 2023-2028 - A quantitative demand analysis and trend forecast<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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XLYNX MATERIALS<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Diazirine-based adhesives and primers facilitate bonding to low-surface-energy plastics<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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AIMPLAS<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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FUSTARISE: Recovery of biomass and transformation into packaging materials<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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HENKEL<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Henkel enables sustainable transformation: first bio-based PUR-adhesives for load-bearing timber construction<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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SHENZHEN FEIYANG PROTECH<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Formulation design and application of polyaspartic polyurea adhesive<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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H.B. FULLER<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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H.B. Fuller acquired Beardow Adams and focuses on innovation and greener production<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

New bio-based glues from Purdue form adhesive bonds that grow stronger in water Gudrun Schmidt – PURDUE UNIVERSITY Patent-pending adhesive formulations developed at Purdue University from fully sustainable, bio-based components establish bonds that grow stronger when underwater or exposed to wet conditions. Gudrun Schmidt, an associate professor of practice in Purdue\u2019s Department of Chemistry, and […]<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":7082,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-7006","page","type-page","status-publish","hentry"],"yoast_head":"\nPURDUE-ENG - Adesivi & Sigillanti<\/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:\/\/www.adesiviesigillanti.it\/en\/archive\/archive-2024\/issue-1-2024\/purdue-eng\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PURDUE-ENG - Adesivi & Sigillanti\" \/>\n<meta property=\"og:description\" content=\"New bio-based glues from Purdue form adhesive bonds that grow stronger in water Gudrun Schmidt – PURDUE UNIVERSITY Patent-pending adhesive formulations developed at Purdue University from fully sustainable, bio-based components establish bonds that grow stronger when underwater or exposed to wet conditions. 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