Progress 01/01/24 to 12/31/24
Outputs Target Audience: Graduate and undergraduate students through formal classroom instruction (BSE 460-Biorefining at UW-Madison). Graduate students participated in the research activities of this project. The general public, farmers, mulch film producers, etc., through the website, newsletter, presentations, etc. (AMI Agricultural Film conference, Lynden Ag Show/Small Fruit Conference) Peer researchers through seminars and presentations at conferences (e.g., AIChE meeting, International Society of Industrial Ecology conference, and American Society for Horticultural Science conference). Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?UW-Madison: One postdoc and three graduate students were involved in this project at the University of Wisconsin-Madison. Through this project, the postdoc and students studied the knowledge of biomass, and molten salt hydrate, and learned the skills and techniques for analysis and characterization of biomass. They were also trained in literature research, experiment design, data analysis, technical communication, and manuscript preparation for publication. The postdoc and students learned how to use the instruments/equipment for preparation, characterization, and soil biodegradation of lignocellulosic films, including universal test machine, TGA, contact angle, AFM, SEM, XRD, rheometer, etc. One graduate student attended and presentedat the 7thInternational Conference on Nanogenerators and Piezotronics (NGPT 2024), May 19 - 23, 2024, in Madison, WI. The postdoc and two students attended and presented at the 2024 AIChE meeting. WSU:One graduate student is involved in the project at Washington State University. The student has learned about soil-biodegradable mulch feedstocks and the unique attributes of LCF, experimental design and fundamentals of data analysis, technical communication to academic and non-academic audiences, and manuscript preparation. UMD:One graduate student is involved in the project at the University of Maryland, College Park. The student has learned about the mechanical testing of lignocellulosic films and how to extract key mechanical properties of the films from such testing. The student is also trained in literature study, technical communication, and technical writing. Yale:One postdoc was involved in this project at Yale. He was offered opportunities to serve as a mentor to graduate students in Yao's industrial ecology and life cycle assessment courses. The plastic life cycle assessment literature collected was incorporated into Yao's life cycle assessment class, which had30 + students/year, predominately professional master's students. How have the results been disseminated to communities of interest? The ideas, results, and findings of the project were shared with students in the course "Biorefining: Energy and Products from Renewable Resources" offered annually by PI (Dr. Pan). This made more students aware of the technology developed in this project and its impact on the area. Part of the outcomes and findings from this project were presented at the46thSymposium on Biomaterials, Fuels, and Chemicals (SBFC), April 28 - May 1, 2024, Westin Alexandria of Old Town, Alexandria, VA. Part of the outcomes and findings from this project were presented with two oral presentations at the 2024 AIChE Annual Meeting to share with peers. Information about LCF was shared in a newsletter article titled, "What is lignocellulose film?", published inSustainable Mulch Management. The article has a readership of 259 individuals worldwide involved in soil-biodegradable mulch research, outreach, and manufacturing. LCF film was introduced at various academic and industry events including conferences and a field day in 2024. The target audience reached included specialty crop growers, mulch film recyclers, film extruders, mulch manufacturers, academics, crop consultants/extension agents, and other industry stakeholders. We estimate approximately 250 people were educated on LCF films at these events. What do you plan to do during the next reporting period to accomplish the goals? Functionalize LCFs to meet the requirements of mulch films, such as improving elongation and wet stability. Furthermore, evaluate their performance as mulch films compared to commercial alternatives. Upgrade an existing wet spinning machine and integrate several custom-designed components to enable efficient and consistent LCF production. The updated lab-scale system will support a continuous production process, replicating industrial operations on a smaller scale to validate the feasibility of future scale-up. Research the dependence of various processes and raw materials on the mechanical properties and microstructure of the films. Set up an appropriate standard method and condition to test the films, for example, find an appropriate humidity condition to run the test. Conduct field tests of the LCFs to evaluate their performance as mulch films in comparison with commercial mulch films. Update the project webpage quarterly with new information. Distribute emerging project information via mulch-specific social media channels, specifically Mulch_Matters Instagram, LinkedIn, and podcast accounts. Share new information via webinars with emphasis on comparisons between PE mulch and LCF. Webinar attendees will be evaluated for their perspectives on the LCFs, including knowledge change and bridges and barriers to use (where applicable) via Qualtrics online surveys, focus group meetings, or one-on-one interviews using an interview template. Author another newsletter article in the Sustainable Mulch Management newsletter, as well as leverage emerging project information and publish in trade journals, and update PowerPoint slides available on the project webpage. Disseminate information at academic and trade conferences. Begin impact assessment after webinar and conference presentations via Qualtrics surveys to assess barriers and bridges to using LCF. Continue training postdoc and graduate students through this project. Publish peer-reviewed journal articles based on the results and findings from this project. Based on the preliminary results of the life cycle assessment, propose improvement strategies, e.g., material recycling and green energy sources. Advance conventional methods of life cycle assessment to include the biodegradation performance of LCF, comparing the environmental impacts of various end-of-life options between LCF and conventional plastic mulches.
Impacts What was accomplished under these goals?
This project is to produce fully soil-biodegradable lignocellulosic films (LCFs) from wood chips.The LCFs are expected to have satisfactory mulching performance to replace petroleum-derived plastic mulches used in horticultural crop production. Through the proposed extension activities, the research findings and technologies on soil-biodegradable mulches (BDMs) will be effectively delivered to stakeholders and the public. During this reporting period (from 2024-01-01 to 2024-12-31), the following activities/experiments were conducted/completed. Cellulose (wood powder) dissolution in a concentrated salt (LiBr or CaBr2) is the most critical operation to fabricate LCFs as mulch film through the proposed approach of dissolution and regeneration. Therefore, we carefully studied the dissolution process of cellulose in calcium bromide solution and lithium bromide solution, respectively. It was found that the cellulose dissolution is dependent on salt concentration, temperature, pH, cellulose loading, cellulose structure, and other factors. Optimal conditions have been determined for cellulose dissolution in both LiBr and CaBr2 solutions. It was also demonstrated that LCFs can be prepared from cellulose, wood pulp, and wood powder via dissolution and regeneration in the salt solutions. These results and findings are included in two manuscripts. One has been published (https://doi.org/10.1016/j.carpta.2024.100522) and another is in preparation. We established a protocol to fabricate LCFs from different feedstocks (pure cellulose, bleached and unbleached wood pulps, and wood chips), including unit operations of feedstock pretreatment, cellulose dissolution and regeneration, film formation, drying, hot press, and surface treatment.We have determined optimal conditions for the operations to fabricate LCFs. We have purchased the required special equipment (e.g., ball mill, film former, film dryer, plate hot-press, and roller hot-press) for fabricating large-size LCFs. We prepared LCF samples for further characterization and field tests. We did a soil degradation experiment by burying LCFs in soil. It was found that LCFs can be completely degraded in soil within 5 weeks. We demonstrated the concept of roll-to-roll continuous production of LCFs using a wet spinning machine and are working on the process optimization and operation integration. We have tested the mechanical properties of the lignocellulosic films, such as stiffness, tensile strength, and fracture toughness. We have also started collecting and reviewing the literature on the mechanics of lignocellulosic films. The results indicated that the tensile strength of LCFs is higher, but elongation is significantly lower than polyethylene film. We have completed a manuscript draft on the preparation, properties, and applications of lignocellulosic films. The proposal has been accepted by Chemical Reviews, and we will submit the manuscript to the journal soon. We conducted an experiment that will evaluate initial formulations of lignocellulose film in a greenhouse and then evaluate their rate of in-soil biodegradation in comparison to plastic biodegradable mulch. Two postdocs and five graduate students were involved in related research and outreach activities. Educational content that introduces and defines LCF for stakeholder groups was created and includes PowerPoint slides and a newsletter article. The PowerPoint slide will be narrated and made into a video in 2025. All developed content will go onto our project-specific webpage on co-PI DeVetter's "Mulch Technologies" website, where a specific webpage for our project was created and published in 2024 (https://lignocellulosicfilm.wordpress.com/). The newsletter article titled "What is lignocellulose film?" was published in the widely read "Sustainable Mulch Management" newsletter and has a readership of 259 individuals.A webinar is in development and will occur in 2025.Information has also been presented at grower, mulch manufacturer, and academic events. Based on the experiments, we conducted input-output analyses for synthesizing LCF with critical solvent (LiBr) recycled, developing a life cycle inventory considering mass and energy balances. We further used the inventory to quantify the greenhouse gas emissions for producing LCF, identifying the key raw materials and unit processes with the largest contribution. Consumer surveys as part of the impact assessment were initiated.
Publications
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2024
Citation:
Jiansong Chen, Haishun Du, Ruolin Wang, Zhenhui Jin, Longwei Li, Yi-Cheng Wang, and Xuejun Pan. 2024. Lignocellulosic materials-based triboelectric nanogenerators for harvesting mechanical energy (Invited talk). The 7th International Conference on Nanogenerators and Piezotronics (NGPT 2024), May 19 23, 2024, Madison, WI.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2024
Citation:
Xuejun Pan. 2024. Molten salt hydrate as a unique solvent for the fractionation, processing, and conversion of lignocellulosic biomass (Invited talk). The 46th Symposium on Biomaterials, Fuels and Chemicals (SBFC), April 28 May 1, 2024, Westin Alexandria of Old Town, Alexandria, VA.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2024
Citation:
Haishun Du and Xuejun Pan. 2024. Sustainable preparation and multifunctional applications of nanocellulose. The 2024 AIChE Annual Meeting, October 2731, 2024, San Diego, CA.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2024
Citation:
Jiansong Chen, Haishun Du, Yi-Cheng Wang, and Xuejun Pan. 2024. Chemical functionalized cellulose films for high-performance triboelectric nanogenerators in energy harvesting and self-powered sensing. The 2024 AIChE Annual Meeting, October 2731, 2024, San Diego, CA.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2024
Citation:
Williams, Aidan. 2024. Introducing a New Biobased, Biodegradable Mulch: Lignocellulosic Film. American Society for Horticultural Sciences Conference. Sept. 26, 2024. Honolulu, HI. Oral presentation.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2024
Citation:
Williams, Aidan, Haishun Du, Teng Li, Yuan Yao, Xuejun Pan, and Lisa Wasko DeVetter. 2024. Introducing A New Biobased, Biodegradable Mulch: Lignocellulosic Film. AMI Agricultural Film North America Conference. July 23-24, 2024. Tampa, FL. Oral presentation.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2024
Citation:
Williams, Aidan. 2024. What is Lignocellulose Film? Trash it or Till it? Mulch Technologies Field Day. Aug. 21, 2024. Mount Vernon, WA. Oral presentation.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2024
Citation:
Williams, Aidan. 2024. What is Lignocellulose Film? Trash it or Till it? Lynden Ag Show/Small Fruit Conference. Lynden, WA. Nov. 4, 2024. Poster presentation.
- Type:
Peer Reviewed Journal Articles
Status:
Published
Year Published:
2024
Citation:
Zhiqiang Pang, Ning Li, Cuihua Dong, Hairui Ji, Yang Liao, Guihua Yang, Xuejun Pan. Insights into the dissolution of cellulose in lithium bromide solution. Carbohydrate Polymer Technologies and Applications, 2024, 7, 100522.
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Progress 01/01/23 to 12/31/23
Outputs Target Audience: Graduate and undergraduate students through formal classroom instruction (BSE 460-Biorefining at UW-Madison). Graduate students participated in the research activities of this project. The general public, farmers, mulch film producers, etc. through the website, newsletter, presentations, etc. Peer researchers through seminars and conference presentations (e.g., AIChE meeting, International Society of Industrial Ecology conference). Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?UW-Madison: One postdoc and two graduate students were involved in this project at the University of Wisconsin-Madison. Through this project, the postdoc and students studied the knowledge of biomass, and molten salt hydrate, and learned the skills and techniques for analysis and characterization of biomass. They were also trained in literature research, experiment design, data analysis, technical communication, and manuscript preparation for publication. The postdoc and students took the training workshops to learn how to use the instruments/equipment for material characterization, including universal test machine, TGA, contact angle, AFM, SEM, XRD, rheometer, etc. The postdoc and one student attended and presented at the 2023 AIChE meeting. WSU:One graduate student is involved in the project at Washington State University. The student has learned about soil-biodegradable mulch feedstocks and the unique attributes of LCF, experimental design and fundamentals of data analysis, technical communication to academic and non-academic audiences, and manuscript preparation. UMD:One graduate student is involved in the project at the University of Maryland, College Park. The student has learned about the mechanical testing of lignocellulosic films and how to extract key mechanical properties of the films from such testing. The student is also trained in literature study, technical communication, and technical writing. Yale:The plastic life cycle assessment literature collected was included in Yao's life cycle assessment class with 33 students, most of whom were professional master students. How have the results been disseminated to communities of interest? The ideas, results, and findings of the project were shared with students in the course "Biorefining: Energy and Products from Renewable Resources" offered annually by PI (Dr. Pan). This made more students aware of the technology developed in this project and its impacts on the area. Part of the outcomes and findings from this project were presented at the 2023 AIChE Annual Meeting to share with peers. Information about LCF was shared in a newsletter article titled, "What is lignocellulose film?", published inSustainable Mulch Management. The article has a readership of 259 individuals worldwide involved in soil-biodegradable mulch research, outreach, and manufacturing. What do you plan to do during the next reporting period to accomplish the goals? Conduct field tests of the LCFs to evaluate their performance as mulch films in comparison with commercial mulch films. Carefully characterize the LCFs fabricated from cellulose, bleached wood pulp, unbleached wood pulp, and wood powder in terms of morphological, mechanical, and chemical properties. Publish the project webpage and update the webpage quarterly to include emerging project information. Distribute emerging project information via mulch-specific social media channels, specifically Mulch_Matters Instagram and podcast accounts. Share information via webinars with an emphasis on comparisons between PE mulch and LCF. Publish information on the project data-sharing platform. Author another newsletter article in the Sustainable Mulch Management newsletter as well as leverage emerging project information and publish in trade journals and updated PowerPoint slides available on the project webpage. Disseminate information at academic and trade conferences. Begin impact assessment after webinar and conference presentations via Qualtrics surveys to assess barriers and bridges to using LCF. Continue training postdoc and graduate students through this project. Attend conferences to present and share the findings from this project. Publish peer-reviewed journal articles based on the results and findings from this project. File a patent for the method developed to fabricate films from cellulose and lignocellulose materials. Collect data onenergy consumption and mass input and output. Those data will be used for conducting techno-economic analysis and life cycle assessment.
Impacts What was accomplished under these goals?
This project is to produce fully soil-biodegradable lignocellulosic films (LCFs) from wood chips.The LCFs are expected to have satisfactory mulching performance to replace petroleum-derived plastic mulches used in horticultural crop production. The proposed extension activities will effectively deliver the research findings and technologies on soil-biodegradable mulches (BDMs) to stakeholders and the public. During this reporting period, the following activities/experiments were conducted/completed. Cellulose (wood powder) dissolution in a concentrated salt (LiBr or CaBr2) is the most critical operation to fabricate LCFs as mulch film through the proposed approach of dissolution and regeneration. Therefore, we carefully studied the dissolution process of cellulose in calcium bromide solution and lithium bromide solution, respectively. It was found that cellulose dissolution is dependent on salt concentration, temperature, pH, cellulose loading, cellulose structure, and other factors. Optimal conditions have been determined for cellulose dissolution in LiBr and CaBr2 solutions. It was also demonstrated that LCFs can be prepared from cellulose, wood pulp, and wood powder via dissolution and regeneration in the salt solutions. These results/findings are included in two manuscripts for publication. We have established a protocol to fabricate LCFs from different feedstock (pure cellulose, bleached and unbleached wood pulps, and wood chips), including unit operations of feedstock pretreatment, cellulose dissolution and regeneration, film formation, drying, hot press, and surface treatment.We have determined optimal conditions for the operations to fabricate LCFs. We have purchased the required special equipment (e.g., ball mill, film former, film dryer, plat hot-press, and roller hot-press) for fabricating large-size LCFs. We are preparing LCF samples for further characterization and field tests. We have started testing the mechanical properties of the lignocellulosic films, such as stiffness, tensile strength, and fracture toughness. We have also started collecting and reviewing the literature on the mechanics of lignocellulosic films. We developed an experiment that will evaluate initial formulations of lignocellulose film in a greenhouse and then evaluate their rate of in-soil biodegradation compared to plastic biodegradable mulch. 1 postdoc and 4 graduate students were involved in this project in related research and outreach activities. Educational content that introduces and defines LCF for stakeholder groups was created and includes PowerPoint slides and a newsletter article. The PowerPoint slide will be narrated and made into a video in 2024. All developed content will go onto our project-specific webpage on co-PIs DeVetter's "Mulch Technologies" website (https://smallfruits.wsu.edu/plastic-mulches/), which will be published in Jan 2024. The newsletter article titled, "What is lignocellulose film?" was published in the widely read "Sustainable Mulch Management" newsletter and has a readership of 259 individuals.
Publications
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2023
Citation:
Jiansong Chen, Zhiqiang Pang, Haishun Du, and Xuejun Pan. Cellulose dissolution and regeneration in calcium bromide solution. 2023 AIChE Annual meeting, Nov. 510, Orlando, FL.
- Type:
Other
Status:
Published
Year Published:
2023
Citation:
Aidan Williams. 2023. What is lignocellulosic film? Sustainable Mulch Management Newsletter. Vol 2. Available online: https://smallfruits.wsu.edu/plastic-mulches/newsletter/.
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