{"id":5999,"date":"2024-05-14T19:47:00","date_gmt":"2024-05-14T19:47:00","guid":{"rendered":"https:\/\/new.www.purdue.edu\/newsroom\/?post_type=purduetoday&p=5999"},"modified":"2024-08-20T12:13:50","modified_gmt":"2024-08-20T16:13:50","slug":"purdue-researchers-develop-sustainable-biodegradable-superabsorbent-materials-from-hemp","status":"publish","type":"post","link":"https:\/\/www.purdue.edu\/newsroom\/2024\/Q2\/purdue-researchers-develop-sustainable-biodegradable-superabsorbent-materials-from-hemp","title":{"rendered":"Purdue researchers develop sustainable, biodegradable superabsorbent materials from hemp"},"content":{"rendered":"\n

WEST LAFAYETTE, Ind.<\/strong> \u2014 The manufacture and discard of traditional superabsorbent materials \u2014 typically made from synthetic polymers, primarily polyacrylate-based compounds \u2014 are affecting the planet. Purdue University researchers are developing biodegradable materials that retain water in a cleaner, more sustainable way and have much less environmental impact.\u00a0<\/p>\n\n\n\n

Senay Simsek<\/a> leads a team of researchers in Purdue\u2019s College of Agriculture<\/a> using cellulose extracted from hemp and refined through a sequence of treatments to create the patent-pending, superabsorbent materials. Simsek is a professor in and the head of the Department of Food Science<\/a>, and holds the Dean\u2019s Chair in Food Science.<\/p>\n\n\n\n

\u201cWe are passionate about the potential of our product to make a significant environmental impact,\u201d Simsek said. \u201cBy introducing a commercial product that helps save our planet, we aim to lead the way in sustainable innovation \u2014 helping to heal the planet one application at a time.\u201d<\/p>\n\n\n\n

Drawbacks with traditional superabsorbent materials<\/strong><\/h2>\n\n\n\n

Traditional superabsorbent materials are used around the globe in multiple applications including disposable diapers, feminine hygiene products and agricultural water retainers.<\/p>\n\n\n\n

\u201cThis widespread use exacerbates their environmental impact due to the volume of waste generated and the universal nature of the problems they cause,\u201d Simsek said.<\/p>\n\n\n\n

Production of traditional superabsorbent polymers often requires significant energy inputs, which contributes to their overall environmental footprint. Also, they are made from raw materials derived from nonrenewable resources, like petroleum-based products, which also are used to make plastics and various chemicals.<\/p>\n\n\n\n

\u201cThe reliance on petroleum-based materials in their production is a further concern, as it ties these products to fluctuating oil prices and geopolitical tensions,\u201d Simsek said, noting that this also leads to the depletion of limited resources. \u201cTransitioning to materials like hemp-based cellulose could mitigate this issue by utilizing a renewable resource to produce superabsorbent materials.\u201d<\/p>\n\n\n\n

Finally, the waste from used, nonbiodegradable, disposable diapers alone is impacting the planet\u2019s health. The World Economic Forum reported in August 2023<\/a> that over 300,000 disposable diapers are incinerated or taken to landfills each minute. Babies use between 4,000 and 6,000 diapers before they are potty-trained. Those numbers don\u2019t include the billions of menstrual pads and tampons discarded annually in the U.S. alone.<\/p>\n\n\n\n

Purdue innovative materials<\/strong><\/h2>\n\n\n\n

Simsek said hurds and bast are two parts of the hemp plant that offer unique benefits for sustainable material development, particularly in absorption technologies.<\/p>\n\n\n\n

\u201cHemp hurds, found in the inner woody core of the hemp stalk, are highly absorbent due to their high cellulose content and low lignin levels. This makes them an excellent alternative for superabsorbent applications,\u201d she said. \u201cHemp bast, the fibrous outer layer, while less absorbent, provides strength and durability.\u201d<\/p>\n\n\n\n

She added, \u201cThe cellulose extracted from these parts is particularly effective because its molecular structure can be modified to enhance its water retention capabilities, making it ideal for products requiring high absorbency.\u201d<\/p>\n\n\n\n

Simsek said the Purdue process to refine the cellulose extracted from hemp involves a carefully designed sequence of treatments.<\/p>\n\n\n\n

\u201cThe treatments break down the natural structure of the cellulose, increasing its surface area and porosity. This enhancement allows the cellulose to absorb and retain more water,\u201d she said. \u201cA fitting analogy would be turning a compact sponge into a more open, fluffy one. This alteration dramatically improves its ability to soak up and hold moisture, which is crucial for applications that demand high absorbency. The uniqueness of our technology lies in its versatility, making it highly tunable for diverse applications of superabsorbent materials across various industries.\u201d<\/p>\n\n\n\n

Along with diapers and hygiene products, the Purdue-developed material could be applied to water retention in agriculture. <\/p>\n\n\n\n

\u201cFor water retention in agriculture, the improved water efficiency helps maintain crop health during droughts, offering a sustainable alternative to traditional superabsorbents that can harm the soil and plant growth,\u201d Simsek said. \u201cOur approach conserves water and supports the ecosystem by providing a biodegradable solution that integrates seamlessly into natural cycles.\u201d <\/p>\n\n\n\n

Another application is biosensors used in a variety of industries. <\/p>\n\n\n\n

\u201cThese include glucose strips and pregnancy tests,\u201d Simsek said. \u201cThe versatility stems from the material\u2019s ability to respond dynamically to environmental changes. This trait is essential for timely and accurate biosensing.\u201d<\/p>\n\n\n\n

Validation and next steps<\/strong><\/h2>\n\n\n\n

Simsek and her team tested the Purdue superabsorbent materials made from hemp using standardized absorbency tests, which compared them against traditional superabsorbent materials such as polyacrylate-based products.<\/p>\n\n\n\n

\u201cThe hemp hurd, due to its enhanced surface area and porosity from our refining process, showed significantly higher absorption capacity than both hemp bast and many traditional materials,\u201d she said. \u201cThis validation underscores not only the effectiveness of our technology but also its potential to replace less sustainable options in the market, offering a biodegradable and renewable alternative.\u201d<\/p>\n\n\n\n

Simsek said the next step to bring the superabsorbent materials to the market is to scale up the technology to industrial levels.<\/p>\n\n\n\n

\u201cThis scaling phase is vital not only for refining our process but also for demonstrating the practical applications of our innovation in agriculture and food packaging, areas where sustainable solutions are urgently needed,\u201d she said.<\/p>\n\n\n\n

\u201cWe are passionately pursuing further collaborations with industry leaders who share our vision of replacing traditional superabsorbents with our biodegradable, sustainable alternative,\u201d Simsek said. \u201cThis support will be instrumental in helping us meet regulatory requirements and achieve widespread adoption, ultimately allowing us to provide future generations with a cleaner, more sustainable way to retain water and reduce environmental impact.\u201d<\/p>\n\n\n\n

Simsek disclosed the superabsorbent hemp-based materials to the Purdue Innovates Office of Technology Commercialization<\/a>, which has applied for a patent from the U.S. Patent and Trademark Office to protect the intellectual property. Industry partners interested in developing or commercializing the work should contact Dipak Narula, assistant director of business development and licensing \u2014 physical sciences, at dnarula@prf.org<\/a> about track code 70273<\/a>.<\/p>\n\n\n\n

Simsek and her team received seed funding through the College of Agriculture\u2019s AgSEED, or Agricultural Science and Extension for Economic Development program<\/a>, an internal competitive grants system focused on advancing Indiana\u2019s leadership in plant and animal agriculture and rural development.<\/p>\n\n\n\n

About Purdue Innovates Office of Technology Commercialization<\/strong><\/h2>\n\n\n\n

The Purdue Innovates Office of Technology Commercialization<\/a> operates one of the most comprehensive technology transfer programs among leading research universities in the U.S. Services provided by this office support the economic development initiatives of Purdue University and benefit the university\u2019s academic activities through commercializing, licensing and protecting Purdue intellectual property. In fiscal year 2023, the office reported 150 deals finalized with 203 technologies signed, 400 disclosures received and 218 issued U.S. patents. The office is managed by the Purdue Research Foundation, which received the 2019 Innovation & Economic Prosperity Universities Award for Place from the Association of Public and Land-grant Universities. In 2020, IPWatchdog Institute ranked Purdue third nationally in startup creation and in the top 20 for patents. The Purdue Research Foundation is a private, nonprofit foundation created to advance the mission of Purdue University. Contact otcip@prf.org<\/a> for more information.<\/p>\n\n\n\n

About Purdue University<\/strong>\u00a0<\/h2>\n\n\n\n

Purdue University is a public research institution demonstrating excellence at scale. Ranked among top 10 public universities and with two colleges in the top four in the United States, Purdue discovers and disseminates knowledge with a quality and at a scale second to none. More than 105,000 students study at Purdue across modalities and locations, including nearly 50,000 in person on the West Lafayette campus. Committed to affordability and accessibility, Purdue\u2019s main campus has frozen tuition 13 years in a row. See how Purdue never stops in the persistent pursuit of the next giant leap \u2014 including its first comprehensive urban campus in Indianapolis, the new Mitchell E. Daniels, Jr. School of Business, and Purdue Computes \u2014 at https:\/\/www.purdue.edu\/president\/strategic-initiatives<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

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