期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 173, 期 -, 页码 128-135出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.01.102
关键词
Chitosan nanowhisker; Poly(butylene succinate); Nanocomposite
资金
- Bio-Industrial Technology Development Program - Ministry of Trade, Industry and Energy (MI, Korea) [20008628]
- Korea Research Institute of Chemical Technology (KRICT) [SS2142-10]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2018R1C1B6002344]
The study demonstrates that chitosan nanowhiskers (CsWs) can effectively enhance the strength and toughness of poly(butylene succinate) (PBS). The PBS nanocomposite prepared with CsWs shows the highest tensile strength and elongation at break reported for all PBS types, making it a promising candidate for biodegradable disposable commodities.
Biodegradable aliphatic polyesters need to be tough for commodity-plastic applications, such as disposable bags. Herein, we show that chitosan nanowhiskers (CsWs) prepared from naturally abundant chitin is an effective nanofiller that reinforces the strength and toughness of poly(butylene succinate) (PBS). In-situ polycondensation of an aqueous solution of processed CsWs led to a PBS nanocomposite with the highest tensile strength (77 MPa) and elongation at break (530%) reported to date for all PBS types at a minimal nanofiller content of 0.2 wt%. The observed 3.2-fold increase in toughness of the CsW/PBS composite compared to neat PBS is superior to those of composites prepared using cellulose nanocrystals, chitin nanowhiskers, and unstably dispersed CsWs in 1,4-butanediol monomer. Interestingly, CsWs efficiently overcome the disadvantages of the PBS film that easily tears. The highly polar surfaces of the CsWs strongly bind to polymer chains and promote a fibrillar and micro-void structure, thereby maximizing the chain-holding ability of the nanofiller, which resists external tensile and tear stress. This sustainable all-organic nanocomposite is a promising candidate for biodegradable disposable commodities. (C) 2021 Elsevier B.V. All rights reserved.
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