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N,N ‐Bis(2‐hydroxyethyl)formamide as a New Plasticizer for Thermoplastic Starch
Author(s) -
Dai Hongguang,
Chang Peter R.,
Yu Jiugao,
Ma Xiaofei
Publication year - 2008
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.200800017
Subject(s) - plasticizer , crystallinity , thermoplastic , starch , differential scanning calorimetry , formamide , materials science , fourier transform infrared spectroscopy , corn starch , ultimate tensile strength , scanning electron microscope , chemical engineering , nuclear chemistry , polymer chemistry , chemistry , composite material , organic chemistry , physics , engineering , thermodynamics
N,N ‐Bis(2‐hydroxyethyl)formamide (BHF) was synthesized efficiently and used as a new plasticizer for corn starch to prepare thermoplastic starch (TPS). The hydrogen bond interaction between BHF and starch was proven by Fourier‐transform infrared (FT‐IR) spectroscopy. As detected by scanning electron microscopy (SEM), starch granules were completely disrupted and a continuous phase was obtained. The crystallinity of corn starch and BHF‐plasticized TPS (BTPS) was characterized by X‐ray diffraction (XRD). The thermal behavior of glycerol‐plasticized TPS (GTPS) and BTPS was investigated by differential scanning calorimetry (DSC). The water resistance of BTPS was better than that of GTPS. Generally, at low relative humidity (RH), the tensile strength of BTPS was higher than that of GTPS. At high RH, the elongation at break of BTPS was higher than that of GTPS.