Properties and Biodegradation of Thermoplastic Starch Obtained from Grafted Starches with Poly(lactic acid)

Cuevas-Carballo, Z. B.; Duarte-Aranda, S.; Canché‐Escamilla, G.

doi:10.1007/s10924-019-01540-w

Cited by 30 publications

(20 citation statements)

References 38 publications

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“…Furthermore, the grafted chains were more flexible than starch. The high elongation percentages of TPGS films grafted with MAM are consistent with that of a starch film grafted with CL which was reported to elongate up to 50% compared to that of NS film …”

Section: Resultssupporting

confidence: 81%

“…Figure displays X‐ray diffractograms of TPNS film and TPGS films grafted with different percentages of MAM, while Table displays the degrees of crystallinity of those films. All of those films exhibited a similar V h ‐type XRD pattern with diffraction peaks (2 θ ) at 17.4° and 20.4° . All TPGS films grafted with different percentages of MAM exhibited a lower degree of crystallinity compared to that of TPNS film.…”

Section: Resultsmentioning

confidence: 87%

“…The wavenumber at 1460 cm −1 was attributed to O─H bending. The bands appeared at 1200–1300 cm −1 and 1000–1200 cm −1 were associated with C─O─C stretching and C─O─H bending, respectively …”

Section: Resultsmentioning

confidence: 99%

“…reported that a compressed TPGS sheet prepared from corn starch grafted with caprolactone (CL) exhibited the lower Young's modulus and stress at maximum load but a higher elongation compared to a compressed TPNS sheet . The carbonyl group in FTIR spectra and a decrease in crystallinity showed up after corn starch was grafted with CL . It has been reported that a compressed TPGS sheet with corn starch grafted with MMA‐ co ‐butyl acrylate (BA) exhibited a higher flexibility.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Polymethacrylamide‐Grafted Branch on Mechanical Performances, Hydrophilicity, and Biodegradability of Thermoplastic Starch Film

Weerapoprasit

Prachayawarakorn

2019

Starch Stärke

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To overcome the shortcomings of brittleness and high water uptake of thermoplastic native starch (TPNS) film, thermoplastic-grafted starch (TPGS) film is prepared and tested using starch-g-polymethacrylamide (PMAM) with different percentages of grafting. Starch-g-PMAM is compounded in an internal mixer and then shaped by a compression molding machine to produce a TPGS film. Functional group analysis by Fourier transform infrared spectroscopy (FTIR) revealed that the graft copolymerization is successful, as evident from new characteristic infrared (IR) peaks of amide group (C═O stretching and N─H bending). TPGS films with MAM has more surface roughness than TPNS film does. With higher grafting percentages, the degrees of crystallinity and hydrophilicity of TPGS film reduce while the extensibility (based on strain at maximum load) and surface roughness increase, compared to that at lower percentages of grafting. The biodegradability of TPGS films grafted with MAM at different percentages is also examined.

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Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Polymethacrylamide‐Grafted Branch on Mechanical Performances, Hydrophilicity, and Biodegradability of Thermoplastic Starch Film

Weerapoprasit

Prachayawarakorn

2019

Starch Stärke

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“…In addition, grafted starch is biodegradable and possesses higher tensile strength and a better appearance than unmodified starch [69]. However, the TPS grafted with polylactic acid exhibited lower tensile strength than native TPS, with the tensile strength of 2.40 MPa and 0.06 MPa for native and grafted TPS, respectively [79]. Even though the tensile strength of grafted starch decreased, the elongation at break increased by 120% [79].…”

Section: Graftingmentioning

confidence: 99%

Development of Starch-Based Materials Using Current Modification Techniques and Their Applications: A Review

et al. 2021

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Starch is one of the most common biodegradable polymers found in nature, and it is widely utilized in the food and beverage, bioplastic industry, paper industry, textile, and biofuel industries. Starch has received significant attention due to its environmental benignity, easy fabrication, relative abundance, non-toxicity, and biodegradability. However, native starch cannot be directly used due to its poor thermo-mechanical properties and higher water absorptivity. Therefore, native starch needs to be modified before its use. Major starch modification techniques include genetic, enzymatic, physical, and chemical. Among those, chemical modification techniques are widely employed in industries. This review presents comprehensive coverage of chemical starch modification techniques and genetic, enzymatic, and physical methods developed over the past few years. In addition, the current applications of chemically modified starch in the fields of packaging, adhesives, pharmaceuticals, agriculture, superabsorbent and wastewater treatment have also been discussed.

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Near‐Infrared Emission‐Cyanine 5.5 and Doxorubicin Loaded Magnetite Nanoparticles for Dual In Vivo Magnetic Resonance and Biodistribution Imaging

Son Phan,

Thuy Doan,

Thu Huong Le

et al. 2023

ChemistrySelect

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The in vivo imaging of the drug distribution during cancer treatment plays an important role in helping physicians and pharmacists to monitor the progress of treatment and improve the effectiveness of therapy. Our goal in this work was to prepare a multifunctional nano drug delivery system that not only co‐loaded iron oxide nanoparticles (Fe3O4 NPs) and Doxorubicin (Dox) but also attached the near‐infrared fluorescent agent Cyanine 5.5 based on poly(lactide)‐tocopheryl polyethylene glycol 1000 succinate (PLA‐TPGS) copolymer. Cyanine 5.5 was attached to the surface Fe3O4 NPs via the NH−CO chemical bond, followed by co‐loading of Dox onto the PLA‐TPGS copolymer by the emulsion solvent evaporation method. The structural, morphological, dimensional, stability, and optical‐magnetic properties of the as‐synthesized nanosystem were fully characterized. From the drug‐released study, the prolonged release of Dox accelerated with increasing acidic conditions (at pH 5.0 and 6.5), while a slow release was observed at pH 7.4. Through the MTT assay, the nanosystem had cellular toxicity against Hep−G2 and HeLa cell lines with low IC50 values of 0.42 and 0.78 μg.mL−1 in terms of Dox concentration, respectively. At a magnetic field of 7 T, this nanosystem also exhibited a high r2/r1 ratio of 164.5 and a strong contrast magnetic resonance (MR) image in the liver. In vivo biodistribution studies revealed that the highest fluorescence intensity achived in the liver after 6 h, and the nanosystem was eliminated from the body after at least 24 h. Collectively, these results demonstrated that the PLA‐TPGS‐Fe3O4‐Cyanine 5.5‐Dox nanosystem is a good candidate for simultaneously increasing contrast for MR and near‐infrared fluorescence imaging.

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Properties and Biodegradation of Thermoplastic Starch Obtained from Grafted Starches with Poly(lactic acid)

Cited by 30 publications

References 38 publications

Effects of Polymethacrylamide‐Grafted Branch on Mechanical Performances, Hydrophilicity, and Biodegradability of Thermoplastic Starch Film

Effects of Polymethacrylamide‐Grafted Branch on Mechanical Performances, Hydrophilicity, and Biodegradability of Thermoplastic Starch Film

Development of Starch-Based Materials Using Current Modification Techniques and Their Applications: A Review

Near‐Infrared Emission‐Cyanine 5.5 and Doxorubicin Loaded Magnetite Nanoparticles for Dual In Vivo Magnetic Resonance and Biodistribution Imaging

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