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Surface modification of bamboo‐char and its reinforcement in PLA biocomposites
Author(s) -
Qian Shaoping,
Yan Wei,
Zhu Susu,
Fontanillo Lopez Cesar A.,
Sheng Kuichuan
Publication year - 2018
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24800
Subject(s) - char , bamboo , materials science , ultimate tensile strength , composite material , modulus , polymer , porosity , surface modification , chemical engineering , pyrolysis , engineering
High‐temperature bamboo‐char is a potential polymer reinforcement due to its porous structure, high strength and modulus. To improve the surface structure and properties of bamboo‐char, different concentrations of HNO 3 and NaOH solution modifications were conducted. The HNO 3 treatment grafted amino groups on bamboo‐char and NaOH treatment modified carbonyl and carboxyl groups. The specific surface area and the total pore volume of bamboo‐char reduced with HNO 3 treatment, whereas the two values firstly increased and then decreased in the case of NaOH treatment; the maximum values of 30.422 m 2 ·g −1 and 0.066 cm 3 ·g −1 were reached at 10 wt% NaOH concentration. The maximum tensile strength and modulus of PLA/bamboo‐char composites were achieved up to 65.36 and 1012.0 MPa at 15 wt% NaOH concentration. The maximum elongation at break was reached at 15.36% and impact strength of 25.69 KJ·m −2 were obtained at the HNO 3 concentration of 39 and 54 wt%, respectively. These results will help to extend the application of bamboo‐char in polymer composites. POLYM. COMPOS., 39:E633–E639, 2018. © 2018 Society of Plastics Engineers