The melting point test was conducted by differential scanning calorimetry (TAQ2000, NETZSCH) at a scan rate of 5°C min−1, while the decomposition temperature was recorded on a thermogravimetric analyzer (TGA5500, NETZSCH) with the same scan rate. HRMS-ESI spectroscopy was conducted on an Agilent 6540TOF with a Brooke solanX 70 FT-MS and Thermo QE ORBITRAP equipped with ESI. 1H, 13C, and 11B NMR spectroscopy were performed on a Bruker Advance NEO with DMSO-d6 as the solvent. When 11B NMR spectra were recorded, a blank sample was run to determine the influence of the 11B signal arising from the borosilicate glass. Infrared spectra were obtained using tableting with potassium bromide on a Fourier-transform IR (FT-IR) spectrometer (WQF-510A). Density and viscosity measurements were recorded at 25 °C on an Anton Parr, equipped with DMA5000M and Lovis2000ME.
Tga5500
Manufactured by Netzsch
Sourced in United States
The TGA5500 is a thermogravimetric analyzer (TGA) designed for high-performance thermal analysis. It measures the change in a sample's mass as a function of temperature or time under a controlled atmosphere. The TGA5500 provides accurate and reliable data on decomposition, oxidation, and other thermal events.
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2 protocols using tga5500
1
Comprehensive Physicochemical Characterization
2
Characterization of PLA-Cellulose Composites
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PLA IngeoTM 3001D was supplied in pellet form by NatureWorks LLC (Blair, NE, USA) and crushed cryogenically into powders by eSUN (Shenzhen, China). Powder apparent density was 0.62 g/cm3. PLA IngeoTM 3001D consisted of poly L-lactic acid (PLLA) with a D-lactide content of 1.4%. The particle size was in the range of 176–296 μm. Cellulose powder was purchased from Aladdin Industrial Corporation (Shanghai, China), with size varying from 25 to 65 μm.
As shown inFigure 1 , dried cellulose fiber and PLA IngeoTM 3001D powder were mechanically mixed in a high-speed mixer at a mass ratio of 10/90. Its glass transition temperature (Tg) of 58 °C, two crystallization peaks at 89 °C and 151 °C, and the melting temperature (Tm) of 167 °C were obtained using an STA449F3 simultaneous thermal analyzer (Netzsch Group, Selb, Germany) at a heating rate of 10 °C/min, and the thermal degradation temperature (Td) of 358 °C was obtained by a thermogravimetric analyzer (Discovery TGA 5500, New Castle, DE, USA) at a heating rate of 10 °C/min.
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