| Literature DB >> 31887859 |
Chuan-Wei Zhang1, Sandeep S Nair2, Heyu Chen3, Ning Yan4, Ramin Farnood5, Fang-Yi Li6.
Abstract
Lignin containing cellulose nanofibrils (LCNF) were obtained by mechanically fibrillating unbleached tree bark after alkaline extraction and used as a reinforcement in thermoplastic starch (TPS) to develop novel biodegradable composite films. With the addition of 15 wt % LCNF, the tensile strength and modulus of the composites increased by 319 % and 800 % compared to neat TPS films, respectively. The crystalline property of cellulose and the high interaction between TPS and LCNF improved the mechanical property of the composite films. The composite film Tonset and Tmax were 263.1 °C and 316.5 °C, respectively, compared to 250.5 °C and 297.3 °C for neat TPS. The composite films also showed higher water barrier property. Experimental results showed that LCNF features a high lignin content. Lignin, a natural polymer, contains hydrophobic and aromatic groups and, thus, can increase the water barrier property and thermal stability of TPS/LCNF composite films.Entities:
Keywords: Bark; Lignin containing cellulose nanofibril; Mechanical property; Thermal stability; Thermoplastic starch; Water barrier
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Year: 2019 PMID： 31887859 DOI： 10.1016/j.carbpol.2019.115626
Source DB: PubMed Journal: Carbohydr Polym ISSN： 0144-8617 Impact factor: 9.381