Preparation and properties of thermoplastic starch/montmorillonite nanocomposites using <i>N,N</i>‐bis(2‐hydroxyethyl)formamide as a new additive

Dai, Hai Tao; Sheng, Xia; Liu, An; Liu, Naren; Yu, Jianxing; Ma, Xiaofei

doi:10.1002/pc.22142

Cited by 8 publications

(1 citation statement)

References 23 publications

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“…This work is focused on TPS composites with titanium dioxide, with high content of filler (>10 wt.%), which have not been studied so far according to available literature, as summarized below. Common fillers employed in TPS composites comprise clays (Carvahlo et al, 2001;Dai et al, 2012;Kelnar et al, 2013;Oleyaei et al, 2016a;Campos-Requena et al, 2017;Olivato et al, 2017), graphene (Javanbakht and Namazi, 2017), carbon nanotubes (CNT) (Liu S. et al, 2017), natural fibers (Svagan et al, 2009;Kargarzadeh et al, 2017;Pelissari et al, 2017;Ilyas et al, 2018Ilyas et al, , 2019, polysaccharidebased crystals (Dufresne and Castano, 2017;Ali et al, 2018), and metal oxides and chalcogenides (Oleyaei et al, 2016b;Guz et al, 2017;Liu et al, 2018). Titanium dioxide (TiO 2 ) represents attractive filler in materials for biomedical applications due to its biocompatibility with bone cells and tissues (Webster et al, 1999(Webster et al, , 2000Sengottuvelan et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic Starch Composites With Titanium Dioxide and Vancomycin Antibiotic: Preparation, Morphology, Thermomechanical Properties, and Antimicrobial Susceptibility Testing

et al. 2020

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Biodegradable composites of thermoplastic starch (TPS), titanium dioxide particles (TiO 2 ; average size 0.2 µm), and/or antibiotic (ATB; vancomycin) were prepared. Light and electron microscopy demonstrated that our recently developed, two-step preparation procedure yielded highly homogeneous TPS matrix with well-dispersed TiO 2 particles even for high filler concentrations (up to 20%). Oscillatory shear rheometry showed an increase in viscosity of TPS after addition of TiO 2 and ATB (from ca 2 × 10 5 Pa·s to ca 1 × 10 6 Pa·s at 1 rad/s and 120 • C). However, the high viscosity of TPS/TiO 2 /ATB composites did not prevent reproducible preparation of the composites by melt-mixing. Dynamic mechanical analysis proved a significant increase in shear moduli (storage, loss and complex modulus) of TPS after addition of TiO 2 and ATB (storage modulus increased from ca 25 MPa to more than 600 MPa at 1.33 rad/s at room temperature). Both rheological and mechanical properties indicated strong interactions among TPS matrix, filler, and antibiotics. The final TPS composites were soft enough to be cut with a sharp blade at room temperature, the TPS matrix was fully biodegradable, the TiO 2 filler was biocompatible, and the ATB could be released locally during the matrix degradation. Selected samples were tested for bacterial susceptibility using standard tube dilution test and disk diffusion test. The results proved that the ATB retained its bacteriostatic properties after the thermal processing of the composites. Therefore, the prepared TPS/TiO 2 /ATB composites represent a promising material for biomedical applications related to the local release of antibiotics.

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