{"689054":{"#nid":"689054","#data":{"type":"news","title":"Researchers Develop Biodegradable, Plant\u2011Based Packaging From Natural Fibers","body":[{"value":"\u003Cdiv class=\u0022theconversation-article-body\u0022\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/scholar.google.com\/citations?user=YpxchNkAAAAJ\u0026amp;hl=en\u0022\u003EJie Wu\u003C\/a\u003E, an engineering graduate student, was studying a type of striking white beetle found in Southeast Asia and attempting to figure out how to mimic its brilliant color when an unexpected discovery upended the experiment.\u003C\/p\u003E\u003Cp\u003EJie and I had been hoping to identify naturally occurring whitening pigments that could be used in paper and paints. The beetle\u2019s white exoskeleton is made from a compound called chitin, which is a type of carbohydrate \u2013 one that is also commonly found in crab and lobster shells.\u003C\/p\u003E\u003Cp\u003EFirst, Jie extracted chitin nanofibers from crab shells obtained from food waste that are chemically the same as those found in the white beetles. But instead of creating a white material as intended, Jie produced dense, \u003Ca href=\u0022https:\/\/doi.org\/10.1021\/bm501416q\u0022\u003Etransparent films\u003C\/a\u003E. The nanofibers more readily assembled in tightly packed films than in the porous structures Jie desired.\u003C\/p\u003E\u003Cfigure class=\u0022align-right zoomable\u0022\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/images.theconversation.com\/files\/721546\/original\/file-20260303-57-g7dkdj.jpg?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=1000\u0026amp;fit=clip\u0022\u003E\u003Cimg alt=\u0022Two white beetles\u0022 src=\u0022https:\/\/images.theconversation.com\/files\/721546\/original\/file-20260303-57-g7dkdj.jpg?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=237\u0026amp;fit=clip\u0022 srcset=\u0022https:\/\/images.theconversation.com\/files\/721546\/original\/file-20260303-57-g7dkdj.jpg?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=600\u0026amp;h=882\u0026amp;fit=crop\u0026amp;dpr=1 600w, https:\/\/images.theconversation.com\/files\/721546\/original\/file-20260303-57-g7dkdj.jpg?ixlib=rb-4.1.0\u0026amp;q=30\u0026amp;auto=format\u0026amp;w=600\u0026amp;h=882\u0026amp;fit=crop\u0026amp;dpr=2 1200w, https:\/\/images.theconversation.com\/files\/721546\/original\/file-20260303-57-g7dkdj.jpg?ixlib=rb-4.1.0\u0026amp;q=15\u0026amp;auto=format\u0026amp;w=600\u0026amp;h=882\u0026amp;fit=crop\u0026amp;dpr=3 1800w, https:\/\/images.theconversation.com\/files\/721546\/original\/file-20260303-57-g7dkdj.jpg?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=754\u0026amp;h=1109\u0026amp;fit=crop\u0026amp;dpr=1 754w, https:\/\/images.theconversation.com\/files\/721546\/original\/file-20260303-57-g7dkdj.jpg?ixlib=rb-4.1.0\u0026amp;q=30\u0026amp;auto=format\u0026amp;w=754\u0026amp;h=1109\u0026amp;fit=crop\u0026amp;dpr=2 1508w, https:\/\/images.theconversation.com\/files\/721546\/original\/file-20260303-57-g7dkdj.jpg?ixlib=rb-4.1.0\u0026amp;q=15\u0026amp;auto=format\u0026amp;w=754\u0026amp;h=1109\u0026amp;fit=crop\u0026amp;dpr=3 2262w\u0022 sizes=\u0022(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px\u0022\u003E\u003C\/a\u003E\u003C\/p\u003E\u003Cfigcaption\u003E\u003Cspan class=\u0022caption\u0022\u003EAn attempt to mimic the striking white color of \u003C\/span\u003E\u003Cem\u003E\u003Cspan class=\u0022caption\u0022\u003ECyphochilus\u003C\/span\u003E\u003C\/em\u003E\u003Cspan class=\u0022caption\u0022\u003E beetles led researchers to a unique discovery.\u003C\/span\u003E \u003Ca class=\u0022source\u0022 href=\u0022https:\/\/en.wikipedia.org\/wiki\/Cyphochilus#\/media\/File:Cyphochilus_beetles.jpg\u0022\u003E\u003Cspan class=\u0022attribution\u0022\u003EOlimpia1lli\/Wikimedia Commons\u003C\/span\u003E\u003C\/a\u003E\u003Cspan class=\u0022attribution\u0022\u003E, \u003C\/span\u003E\u003Ca class=\u0022license\u0022 href=\u0022http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/\u0022\u003E\u003Cspan class=\u0022attribution\u0022\u003ECC BY-NC-ND\u003C\/span\u003E\u003C\/a\u003E\u003C\/figcaption\u003E\u003C\/figure\u003E\u003Cp\u003EOn a whim, Jie measured the rate at which oxygen passed through the film. The result was astonishing: The barrier allowed less oxygen through than many existing packaging plastics.\u003C\/p\u003E\u003Cp\u003EThat serendipitous finding in 2014 shifted \u003Ca href=\u0022https:\/\/scholar.google.com\/citations?user=3qOG6PUAAAAJ\u0026amp;hl=en\u0022\u003Emy team\u003C\/a\u003E of engineering students\u2019 focus from color to packaging. We asked whether natural materials could rival the performance of common plastics. In the years since, our team has used this discovery to create biodegradable films that offer a more sustainable and effective alternative to plastic packaging.\u003C\/p\u003E\u003Ch2\u003EChallenges of Plastic Packaging\u003C\/h2\u003E\u003Cp\u003EPlastic packaging is commonly used to protect food, pharmaceuticals and personal care products. These plastics keep out moisture and oxygen from the air, so products stay \u003Ca href=\u0022https:\/\/doi.org\/10.1016\/C2012-0-00246-3\u0022\u003Efresh and safe\u003C\/a\u003E.\u003C\/p\u003E\u003Cp\u003EMost packaging has several layers that work together to keep air out, but these layers hinder reuse and recycling efforts. As a result, most of this plastic barrier packaging is discarded to landfills as single-use materials.\u003C\/p\u003E\u003Cp\u003EMany researchers have sought alternatives that are renewable, biodegradable or recyclable, yet just as effective. At Georgia Tech, my team of students and post-docs has spent more than a decade tackling this problem. This journey began with that beetle.\u003C\/p\u003E\u003Ch2\u003EBuilding a Better Barrier\u003C\/h2\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/www.britannica.com\/science\/chitin\u0022\u003EChitin\u003C\/a\u003E is widely available in food waste and mushrooms, and it is used in products such as water filters and wound dressing. However, our early attempts to scale up the film technology based on the beetle-inspired experiment failed.\u003C\/p\u003E\u003Cp\u003EIn 2018, the team made an important leap forward by \u003Ca href=\u0022https:\/\/doi.org\/10.1021\/acssuschemeng.8b01536\u0022\u003Eusing spray coating to create layers\u003C\/a\u003E of chitin and \u003Ca href=\u0022https:\/\/www.niehs.nih.gov\/health\/topics\/agents\/sya-nano\u0022\u003Ecellulose nanomaterials\u003C\/a\u003E. Cellulose, like chitin, \u003Ca href=\u0022https:\/\/www.britannica.com\/science\/cellulose\u0022\u003Eis a carbohydrate polymer\u003C\/a\u003E \u2013 a chain of repeating carbohydrate units \u2013 and it is obtained from plants. These abundant natural materials have opposite electric charges, which led to better barrier performance when we combined them than either material alone.\u003C\/p\u003E\u003Cp\u003EIn this approach, the team sprayed down a layer of chitin, followed by a layer of cellulose. The opposite charges between the chitin and cellulose created a long-range attraction between them that binds the layers to create a dense interface.\u003C\/p\u003E\u003Cp\u003ELater, in collaboration with \u003Ca href=\u0022https:\/\/scholar.google.com\/citations?user=BrXwtO4AAAAJ\u0026amp;hl=en\u0022\u003EMeisha Shofner\u003C\/a\u003E, a materials scientist, and \u003Ca href=\u0022https:\/\/me.gatech.edu\/faculty\/harris\u0022\u003ETequila Harris\u003C\/a\u003E, a mechanical engineer, other students showed these coatings could be applied with \u003Ca href=\u0022https:\/\/doi.org\/10.1021\/acsami.2c09925\u0022\u003Escalable, roll-to-roll techniques\u003C\/a\u003E. Roll-to-roll coating methods are preferred in industry because the coatings are applied continuously to large rolls of a substrate material, such as paper or other biodegradable plastics.\u003C\/p\u003E\u003Cfigure\u003E\u003Cp\u003E\u003Ciframe width=\u0022440\u0022 height=\u0022260\u0022 src=\u0022https:\/\/www.youtube.com\/embed\/EBNyjJFB8Zc?wmode=transparent\u0026amp;start=0\u0022 frameborder=\u00220\u0022 allowfullscreen=\u0022\u0022\u003E\u003C\/iframe\u003E\u003C\/p\u003E\u003Cfigcaption\u003E\u003Cspan class=\u0022caption\u0022\u003ERoll-to-roll coating allows manufacturers to easily apply thin layers of coating to a base material, called a substrate.\u003C\/span\u003E\u003C\/figcaption\u003E\u003C\/figure\u003E\u003Cp\u003EStill, humidity posed a major challenge, limiting any real-world applications. Moisture swelled the film, allowing more oxygen to sneak through.\u003C\/p\u003E\u003Cp\u003EThen came another breakthrough. In 2024, another collaborator, \u003Ca href=\u0022https:\/\/scholar.google.com\/citations?user=ZILIcOwAAAAJ\u0026amp;hl=en\u0022\u003ENatalie Stingelin\u003C\/a\u003E, and I discovered that two common food components resisted water vapor when combined: carboxymethylcellulose \u2013 which is found in ice cream, for example \u2013 and \u003Ca href=\u0022https:\/\/pubchem.ncbi.nlm.nih.gov\/compound\/Citric-Acid\u0022\u003Ecitric acid\u003C\/a\u003E.\u003C\/p\u003E\u003Cp\u003EThe result was a film that \u003Ca href=\u0022https:\/\/doi.org\/10.1039\/D4SU00425F\u0022\u003Ehindered the transmission of moisture\u003C\/a\u003E. The citric acid reacted with the cellulose to form cross-links, which are chemical junctions that bind the cellulose molecules. Once bound, they reduced the film\u2019s moisture uptake.\u003C\/p\u003E\u003Cp\u003EWe integrated this new discovery with the prior work by combining the citric acid and cellulose, and then casting this mixture as a freestanding film by coating it onto a substrate, such as chitin.\u003C\/p\u003E\u003Cp\u003EHowever, that formulation did not have strong oxygen barrier properties because it did not contain the highly crystalline cellulose nanomaterials from our first film. Our team\u2019s most \u003Ca href=\u0022https:\/\/doi.org\/10.1021\/acsapm.5c02909\u0022\u003Erecent achievement\u003C\/a\u003E, from October 2025, combines the above innovations. As a result, we\u2019ve created a bio-based film that is an excellent barrier to both oxygen and moisture.\u003C\/p\u003E\u003Cfigure class=\u0022align-center zoomable\u0022\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/images.theconversation.com\/files\/710006\/original\/file-20251220-56-gcunhe.png?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=1000\u0026amp;fit=clip\u0022\u003E\u003Cimg alt=\u0022A diagram showing a rectangle representing a biodegradable film, with an arrow deflecting off of it showing how it keeps out water vapor and oxygen. On the right is the film.\u0022 src=\u0022https:\/\/images.theconversation.com\/files\/710006\/original\/file-20251220-56-gcunhe.png?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=754\u0026amp;fit=clip\u0022 srcset=\u0022https:\/\/images.theconversation.com\/files\/710006\/original\/file-20251220-56-gcunhe.png?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=600\u0026amp;h=300\u0026amp;fit=crop\u0026amp;dpr=1 600w, https:\/\/images.theconversation.com\/files\/710006\/original\/file-20251220-56-gcunhe.png?ixlib=rb-4.1.0\u0026amp;q=30\u0026amp;auto=format\u0026amp;w=600\u0026amp;h=300\u0026amp;fit=crop\u0026amp;dpr=2 1200w, https:\/\/images.theconversation.com\/files\/710006\/original\/file-20251220-56-gcunhe.png?ixlib=rb-4.1.0\u0026amp;q=15\u0026amp;auto=format\u0026amp;w=600\u0026amp;h=300\u0026amp;fit=crop\u0026amp;dpr=3 1800w, https:\/\/images.theconversation.com\/files\/710006\/original\/file-20251220-56-gcunhe.png?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=754\u0026amp;h=377\u0026amp;fit=crop\u0026amp;dpr=1 754w, https:\/\/images.theconversation.com\/files\/710006\/original\/file-20251220-56-gcunhe.png?ixlib=rb-4.1.0\u0026amp;q=30\u0026amp;auto=format\u0026amp;w=754\u0026amp;h=377\u0026amp;fit=crop\u0026amp;dpr=2 1508w, https:\/\/images.theconversation.com\/files\/710006\/original\/file-20251220-56-gcunhe.png?ixlib=rb-4.1.0\u0026amp;q=15\u0026amp;auto=format\u0026amp;w=754\u0026amp;h=377\u0026amp;fit=crop\u0026amp;dpr=3 2262w\u0022 sizes=\u0022(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px\u0022\u003E\u003C\/a\u003E\u003C\/p\u003E\u003Cfigcaption\u003E\u003Cspan class=\u0022caption\u0022\u003EAn oxygen and water vapor barrier film composed of blended cellulose and chitin.\u003C\/span\u003E \u003Cspan class=\u0022attribution source\u0022\u003EJ. Carson Meredith\u003C\/span\u003E\u003C\/figcaption\u003E\u003C\/figure\u003E\u003Ch2\u003EScaling Up Production\u003C\/h2\u003E\u003Cp\u003EWhen cast into thin films, these components self-organize into a dense structure that resists swelling with water vapor. Tests showed that \u003Ca href=\u0022https:\/\/doi.org\/10.1021\/acsapm.5c02909\u0022\u003Eeven at 80% humidity\u003C\/a\u003E the film matched or outperformed common packaging plastics.\u003C\/p\u003E\u003Cp\u003EThe materials are renewable, biodegradable and compostable. Our team has filed several patent applications, and we are working with industry partners to develop specific packaging uses.\u003C\/p\u003E\u003Cp\u003EOne challenge that applications face is a limited supply of the bio-based components compared to the high volume of conventional plastics. Like any new material, it would take time for manufacturers to develop supply chains as the films begin to be used.\u003C\/p\u003E\u003Cp\u003EFor example, the market demand for purified chitin is small right now, as it is used in niche applications, such as wound dressings and water filtration. Due to its variety of uses, packaging could increase that market demand.\u003C\/p\u003E\u003Cp\u003EThe next challenge is scaling up from experimental films to industrial production, which would likely take several years. The team is exploring roll-to-roll coating techniques and working with industry partners to integrate these materials into existing packaging lines.\u003C\/p\u003E\u003Cp\u003EPolicy and consumer demand will also play a role. As governments push for \u003Ca href=\u0022https:\/\/theconversation.com\/why-stop-at-plastic-bags-and-straws-the-case-for-a-global-treaty-banning-most-single-use-plastics-109857\u0022\u003Ebans on single-use plastics\u003C\/a\u003E and companies set sustainability targets, bio-based films could become part of the solution.\u003C\/p\u003E\u003Cp\u003EThe story of this breakthrough reminds me that science often advances through unexpected results. From a failed attempt to mimic a beetle\u2019s color to a promising alternative to plastic, this research shows how curiosity can lead to solutions for some of our biggest challenges.\u003C!-- Below is The Conversation\u0027s page counter tag. Please DO NOT REMOVE. --\u003E\u003Cimg style=\u0022border-color:!important;border-style:none;box-shadow:none !important;margin:0 !important;max-height:1px !important;max-width:1px !important;min-height:1px !important;min-width:1px !important;opacity:0 !important;outline:none !important;padding:0 !important;\u0022 src=\u0022https:\/\/counter.theconversation.com\/content\/271262\/count.gif?distributor=republish-lightbox-basic\u0022 alt=\u0022The Conversation\u0022 width=\u00221\u0022 height=\u00221\u0022 referrerpolicy=\u0022no-referrer-when-downgrade\u0022\u003E\u003C!-- End of code. If you don\u0027t see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https:\/\/theconversation.com\/republishing-guidelines --\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003EThis article is republished from \u003C\/em\u003E\u003Ca href=\u0022https:\/\/theconversation.com\u0022\u003E\u003Cem\u003EThe Conversation\u003C\/em\u003E\u003C\/a\u003E\u003Cem\u003E under a Creative Commons license. Read the \u003C\/em\u003E\u003Ca href=\u0022https:\/\/theconversation.com\/researchers-develop-biodegradable-plant-based-packaging-from-natural-fibers-new-research-271262\u0022\u003E\u003Cem\u003Eoriginal article\u003C\/em\u003E\u003C\/a\u003E\u003Cem\u003E.\u003C\/em\u003E\u003C\/p\u003E\u003C\/div\u003E","summary":"","format":"full_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EJie Wu, an engineering graduate student, was studying a type of striking white beetle found in Southeast Asia and attempting to figure out how to mimic its brilliant color when an unexpected discovery upended the experiment.\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Jie Wu, an engineering graduate student, was studying a type of striking white beetle found in Southeast Asia and attempting to figure out how to mimic its brilliant color when an unexpected discovery upended the experiment."}],"uid":"27469","created_gmt":"2026-03-17 16:36:23","changed_gmt":"2026-03-19 16:43:18","author":"Kristen Bailey","boilerplate_text":"","field_publication":"","field_article_url":"","location":"Atlanta, GA","dateline":{"date":"2026-03-17T00:00:00-04:00","iso_date":"2026-03-17T00:00:00-04:00","tz":"America\/New_York"},"extras":[],"hg_media":{"679693":{"id":"679693","type":"image","title":"Plastic packaging fills up landfills \u2013 engineers are working on a bio-based alternative that could replace the kind shown here. tuk69tuk\/iStock via Getty Images","body":"\u003Cp\u003EPlastic packaging fills up landfills \u2013 engineers are working on a bio-based alternative that could replace the kind shown here. \u003Ca href=\u0022https:\/\/www.gettyimages.com\/detail\/photo\/white-plastic-bag-on-black-background-royalty-free-image\/1211742906?phrase=plastic%2Bwrap\u0022\u003Etuk69tuk\/iStock via Getty Images\u003C\/a\u003E\u003C\/p\u003E","created":"1773938347","gmt_created":"2026-03-19 16:39:07","changed":"1773938347","gmt_changed":"2026-03-19 16:39:07","alt":"Plastic packaging fills up landfills \u2013 engineers are working on a bio-based alternative that could replace the kind shown here. tuk69tuk\/iStock via Getty Images","file":{"fid":"263885","name":"file-20260303-57-8ad4eq.jpg","image_path":"\/sites\/default\/files\/2026\/03\/19\/file-20260303-57-8ad4eq.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/2026\/03\/19\/file-20260303-57-8ad4eq.jpg","mime":"image\/jpeg","size":128914,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/2026\/03\/19\/file-20260303-57-8ad4eq.jpg?itok=MPEKR6lv"}}},"media_ids":["679693"],"related_links":[{"url":"https:\/\/theconversation.com\/researchers-develop-biodegradable-plant-based-packaging-from-natural-fibers-new-research-271262","title":"Read This Article on The Conversation"}],"groups":[{"id":"1237","name":"College of Engineering"},{"id":"658168","name":"Experts"},{"id":"1214","name":"News Room"},{"id":"117301","name":"Renewable Bioproducts Institute"},{"id":"372221","name":"Renewable Bioproducts Institute (RBI)"},{"id":"1188","name":"Research Horizons"},{"id":"1240","name":"School of Chemical and Biomolecular Engineering"},{"id":"660398","name":"Sustainability Hub"}],"categories":[],"keywords":[{"id":"187915","name":"go-researchnews"}],"core_research_areas":[],"news_room_topics":[{"id":"71911","name":"Earth and Environment"}],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Ch5\u003EAuthor:\u003C\/h5\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/theconversation.com\/profiles\/j-carson-meredith-2540164\u0022\u003EJ. Carson Meredith\u003C\/a\u003E, Professor of Chemical and Biomolecular Engineering, \u003Ca href=\u0022https:\/\/theconversation.com\/institutions\/georgia-institute-of-technology-1310\u0022\u003EGeorgia Institute of Technology\u003C\/a\u003E\u003C\/p\u003E\u003Ch5\u003EMedia Contact:\u003C\/h5\u003E\u003Cp\u003EShelley Wunder-Smith\u003Cbr\u003E\u003Ca href=\u0022mailto:shelley.wunder-smith@research.gatech.edu\u0022\u003E\u003Cstrong\u003Eshelley.wunder-smith@research.gatech.edu\u003C\/strong\u003E\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}