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The CP-MCC was extracted from fresh cassava pulp. Next, the CP-MCC surface was modified with butyryl chloride (esterified to CP-MCC butyrate) to improve dissolution and compatibility with the PHB. FTIR results confirmed that the esterified CP-MCC butyrate had aliphatic chains replacing the hydroxyl groups; this substitution increased the solubilities in acetone, chloroform, and tetrahydrofuran. Biocomposite films were prepared by varying the composition of esterified CP-MCC butyrate as a filler in the PHB matrix at 0, 5, 10, 15, 20 and 100 wt%. The results for the 95:5 and 90:10 CP-MCC butyrate biocomposite films showed that esterification led to improvements in the thermal properties and increased tensile strengths and elongations at break. All prepared biocomposite films maintained full biodegradability.<\/jats:p>","DOI":"10.1371\/journal.pone.0292051","type":"journal-article","created":{"date-parts":[[2023,11,22]],"date-time":"2023-11-22T18:28:51Z","timestamp":1700677731000},"page":"e0292051","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":2,"title":["Valorization of agro-industrial waste from the cassava industry as esterified cellulose butyrate for polyhydroxybutyrate-based biocomposites"],"prefix":"10.1371","volume":"18","author":[{"given":"Passaraporn","family":"Theeraseematham","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Duangdao","family":"Aht-Ong","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kohsuke","family":"Honda","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3598-9344","authenticated-orcid":true,"given":"Suchada Chanprateep","family":"Napathorn","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"340","published-online":{"date-parts":[[2023,11,22]]},"reference":[{"key":"pone.0292051.ref001","doi-asserted-by":"crossref","first-page":"82","DOI":"10.3389\/fsufs.2020.00082","article-title":"Valorization of food loss and wastes: Feedstocks for biofuels and valuable chemicals","volume":"4","author":"S Isah","year":"2020","journal-title":"Frontiers in Sustainable Food Systems"},{"key":"pone.0292051.ref002","doi-asserted-by":"crossref","first-page":"28","DOI":"10.1016\/j.jclepro.2013.10.051","article-title":"Current options for the valorization of food manufacturing waste: a review","volume":"65","author":"N Mirabella","year":"2014","journal-title":"Journal of Cleaner Production"},{"key":"pone.0292051.ref003","doi-asserted-by":"crossref","first-page":"130234","DOI":"10.1016\/j.jclepro.2021.130234","article-title":"Leachate from municipal solid waste landfills in a global perspective: Characteristics, influential factors and environmental risks","volume":"333","author":"S Ma","year":"2022","journal-title":"Journal of Cleaner Production"},{"issue":"1","key":"pone.0292051.ref004","doi-asserted-by":"crossref","first-page":"6424","DOI":"10.1038\/s41598-021-85939-3","article-title":"Microplastic pollution in seawater and marine organisms across the Tropical Eastern Pacific and Gal\u00e1pagos","volume":"11","author":"A Alfaro-N\u00fa\u00f1ez","year":"2021","journal-title":"Scientific reports"},{"issue":"7857","key":"pone.0292051.ref005","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1038\/d41586-021-01143-3","article-title":"Microplastics are everywhere\u2014but are they harmful","volume":"593","author":"X. 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