Abstract:
: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.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Kim H,Shin MS,Jeon H,Koo JM,Eom Y,Choi S,Shin G,Oh DX,Hwang SY,Park Jdoi
10.1016/j.ijbiomac.2021.01.102subject
Has Abstractpub_date
2021-01-18 00:00:00pages
128-135eissn
0141-8130issn
1879-0003pii
S0141-8130(21)00133-1journal_volume
173pub_type
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