scholarly journals Biodegradable nanocomposite of poly(ester-co-carbonate) and cellulose nanocrystals for tough tear-resistant disposable bags

2021 ◽  
Vol 23 (6) ◽  
pp. 2293-2299
Author(s):  
Hyeri Kim ◽  
Hyeonyeol Jeon ◽  
Giyoung Shin ◽  
Minkyung Lee ◽  
Jonggeon Jegal ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Butylene Succinate ◽  
Mechanical Performances

The “3C-tuning” via chemical designing and nanocompositing upgrades mechanical performances of poly(butylene succinate) to a remarkable level with accelerated biodegradation.

Processing and mechanical performances of Poly(Butylene Succinate–co–Adipate) (PBSA) and raw hydrolyzed collagen (HC) thermoplastic blends

2019 ◽  
Vol 77 ◽  
pp. 105900 ◽  
Author(s):  
Maurizia Seggiani ◽  
Vito Gigante ◽  
Patrizia Cinelli ◽  
Maria-Beatrice Coltelli ◽  
Marco Sandroni ◽  
...  
Keyword(s):  
Butylene Succinate ◽  
Hydrolyzed Collagen ◽  
Thermoplastic Blends ◽  
Mechanical Performances

A carbon aerogel with super mechanical and sensing performances for wearable piezoresistive sensors

2019 ◽  
Vol 7 (14) ◽  
pp. 8092-8100 ◽  
Author(s):  
Hao Zhuo ◽  
Yijie Hu ◽  
Zehong Chen ◽  
Xinwen Peng ◽  
Linxiang Liu ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Carbon Aerogel ◽  
Piezoresistive Sensors ◽  
Mechanical Performances

A compressible carbon aerogel with not only super mechanical performances but also ultrahigh linear sensitivity is fabricated from MXene nanosheets and cellulose nanocrystals (CNCs).

scholarly journals Influence of Nanoparticle Pretreatment on the Thermal, Rheological and Mechanical Properties of PLA-PBSA Nanocomposites Incorporating Cellulose Nanocrystals or Montmorillonite

Nanomaterials ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 29 ◽  
Author(s):  
Wissam Abdallah ◽  
Amin Mirzadeh ◽  
Victor Tan ◽  
Musa Kamal
Keyword(s):  
Mechanical Properties ◽  
Cellulose Nanocrystals ◽  
Poly Lactic Acid ◽  
X Ray Diffraction ◽  
Butylene Succinate ◽  
Freeze Dried ◽  
Organically Modified ◽  
Spray Freeze Drying ◽  
Adsorption Desorption ◽  
Quaternary Ammonium Chloride

Nanoparticles based on cellulose nanocrystals (CNC) and montmorillonite clay (MMT) were prepared using spray freeze-drying. The nanoparticles were then used as reinforcement to prepare nanocomposites with poly(lactic acid) (PLA) as the polymer matrix. The effect of spray freeze-dried CNC (SFD-CNC) and spray freeze-dried MMT (SFD-MMT) on the rheological and mechanical properties of PLA and its blends with poly[(butylene succinate)-co-adipate)] (PBSA) were investigated. An epoxy chain extender was used during preparation of the blends and nanocomposites to enhance the mechanical properties of the products. Different methods such as scanning electron microscopy, X-ray diffraction and adsorption/desorption analyses were used to characterize the prepared nanoparticles and their localization in the blends. Dynamic oscillatory shear behavior, elongational viscosity and mechanical characteristics of the nanocomposites of PLA and the blends were evaluated. The results obtained for nanocomposites filled with unmodified SFD-MMT were compared with those obtained when the filler was a commercial organically modified montmorillonite nanoclay (methyl-tallow-bis(2-hydroxyeethyl) quaternary ammonium chloride) (C30B), which was not spray freeze-dried.

scholarly journals Injection-moulding of nitrogen-foamed bio-based microcellular poly(butylene succinate): Processing conditions/foam structure/flexural properties relationship

2020 ◽  
Vol 11 (1-2) ◽  
pp. 30-46
Author(s):  
Nazim Ykhlef ◽  
Eric Lafranche
Keyword(s):  
Cell Density ◽  
Processing Parameters ◽  
Back Pressure ◽  
Flexural Properties ◽  
Processing Conditions ◽  
Butylene Succinate ◽  
Melt Temperature ◽  
Thickness Change ◽  
Foam Structure ◽  
Mechanical Performances

This paper aims to identify the main processing parameters that optimize as well the microcellular structure (cell size, cell density) of nitrogen (N2) foamed injection-moulded poly(butylene succinate) (PBS) as the resultant flexural properties of the part. The part beam geometry was designed so as to reproduce some geometrical shapes (e.g. thickness change, ribs, bosses or holes) occurring on most of industrial parts. A Taguchi L9 design of experiments (DOE) has been first used to quantify the effects of processing conditions on microcellular structure and mechanical performances. Among the processing parameters, the melt temperature, gas content, injection volumetric flow rate and back pressure were chosen for the DOE due to their level of influence on gas dissolution and nucleation phases. An analysis of variance (ANOVA) showed that the microcellular structure depended mainly on nitrogen content and, to a lesser extent, on back pressure representation of gas pressure saturation in the PBS/N2 system during the feeding stage. The resultant specific flexural properties were controlled by the skin/core ratio as well as the finesse of foam structure (cell sizes, cell density) but a 15% loss in specific performances was noted compared with the unfoamed part. The microcellular structure/mechanical performances could be thus established from the microstructure analysis. In a second step, the foamed microcellular structure has been improved by introduction of micro-talc in the PBS acting as cell nucleating agent (heterogeneous nucleation). A significant increase in cell density and cell reduction (40%) were observed.

scholarly journals Surface modification of cellulose nanocrystals with different acid anhydrides for improved dispersion in poly(butylene succinate)

RSC Advances ◽  
2018 ◽  
Vol 8 (67) ◽  
pp. 38305-38314 ◽  
Author(s):  
Yingying He ◽  
Jiang Zhu ◽  
Wentao Wang ◽  
Haitao Ni
Keyword(s):  
Mechanical Property ◽  
Thermal Stability ◽  
Surface Modification ◽  
Cellulose Nanocrystals ◽  
Butylene Succinate ◽  
High Dispersity ◽  
Acid Anhydrides

The hydrophobic CNC was dispersed in PBS to become a high dispersity and mechanical property and thermal stability PBS/modified-CNC composite.

scholarly journals Bamboo Fiber Based Cellulose Nanocrystals/Poly(Lactic Acid)/Poly(Butylene Succinate) Nanocomposites: Morphological, Mechanical and Thermal Properties

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1076
Author(s):  
Masrat Rasheed ◽  
Mohammad Jawaid ◽  
Bisma Parveez
Keyword(s):  
Lactic Acid ◽  
Thermal Properties ◽  
Cellulose Nanocrystals ◽  
Natural Fiber ◽  
Testing Machine ◽  
Bamboo Fiber ◽  
Poly Lactic Acid ◽  
Mechanical And Thermal Properties ◽  
Melt Mixing ◽  
Butylene Succinate

The purpose of this work was to investigate the effect of cellulose nanocrystals (CNC) from bamboo fiber on the properties of poly (lactic acid) (PLA)/poly (butylene succinate) (PBS) composites fabricated by melt mixing at 175 °C and then hot pressing at 180 °C. PBS and CNC (0.5, 0.75, 1, 1.5 wt.%) were added to improvise the properties of PLA. The morphological, physiochemical and crystallinity properties of nanocomposites were analysed by field emission scanning electron microscope (FESEM), Fourier-transform infrared spectroscopy (FTIR) and X-ray diffractometry (XRD), respectively. The thermal and tensile properties were analysed by thermogravimetic analysis (TGA), Differential scanning calorimetry (DSC) and Universal testing machine (UTM). PLA-PBS blend shows homogeneous morphology while the composite shows rod-like CNC particles, which are embedded in the polymer matrix. The uniform distribution of CNC particles in the nanocomposites improves their thermal stability, tensile strength and tensile modulus up to 1 wt.%; however, their elongation at break decreases. Thus, CNC addition in PLA-PBS matrix improves structural and thermal properties of the composite. The composite, thus developed, using CNC (a natural fiber) and PLA-PBS (biodegradable polymers) could be of immense importance as they could allow complete degradation in soil, making it a potential alternative material to existing packaging materials in the market that could be environment friendly.

scholarly journals High-Performance Biocomposite Polyvinyl Alcohol (PVA) Films Modified with Cellulose Nanocrystals (CNCs), Tannic Acid (TA), and Chitosan (CS) for Food Packaging

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Ruowen Tan ◽  
Feng Li ◽  
You Zhang ◽  
Zihui Yuan ◽  
Xuefei Feng ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Tannic Acid ◽  
Cellulose Nanocrystals ◽  
High Performance ◽  
Food Packaging ◽  
Low Cost ◽  
Antibacterial Properties ◽  
Light Transmittance ◽  
Thermal Stabilities ◽  
Mechanical Performances

Polyvinyl alcohol (PVA) has been widely applied in industries for its low cost, nontoxicity, biodegradability, and renewable advantages. However, its unstable structure may not meet some strong physical and mechanical needs. In order to enhance the performances of the PVA film, cellulose nanocrystals (CNCs), tannic acid (TA), and chitosan (CS), working as a reinforcer, a crosslinker, and an antimicrobial agent, respectively, were introduced into the PVA matrix. The results indicated that CNCs, TA, and CS were evenly distributed and cohesively incorporated within the PVA matrix, which contributed to the good mechanical properties and thermal stabilities of biocomposite PVA films. Besides, the addition of TA remarkably improved the antiultraviolet and antioxidant capabilities of PVA films, although the light transmittance declined slightly. It was also observed that the pure PVA film and PVA reinforced with CNCs were incapable of protecting against bacteria, while the ones with CS had prominent antibacterial properties to Escherichia coli and Staphylococcus aureus. Overall, the resulting film presented a high potential utilization as a food packaging material for its outstanding physical and mechanical performances.

scholarly journals Nano-Brushes of Alcohols Grafted onto Cellulose Nanocrystals for Reinforcing Poly(Butylene Succinate): Impact of Alcohol Chain Length on Interfacial Adhesion

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 95 ◽  
Author(s):  
Hatem Abushammala
Keyword(s):  
Surface Properties ◽  
Chain Length ◽  
Cellulose Nanocrystals ◽  
Interfacial Adhesion ◽  
Mechanical Analysis ◽  
Toluene Diisocyanate ◽  
Hydroxyl Groups ◽  
Water Contact ◽  
Butylene Succinate ◽  
Degradation Temperature

Despite the many interesting properties of cellulose nanocrystals (CNCs), their hydrophilicity is one of the main challenges for their processing with hydrophobic polymers and matrices. To overcome this challenge, this paper describes the preparation of brush-like CNCs with tailored surface properties by grafting alcohols of different chain lengths onto their surfaces. Ethanol, 1-butanol, 1-hexanol, and 1-octanol were grafted on the CNC surface using 2,4-toluene diisocyanate (TDI) as a linker. The CNCs were characterized for their structural, morphological, surface, and thermal properties. Because of the grafting, the water contact angle of the CNCs significantly increased from 32° to up to 120°, which was dependent on the chain length of the grafted alcohol. The thermal stability of the CNCs was also improved, mainly as a result of the reaction of TDI with the CNC hydroxyl groups. Later, the CNCs were used to reinforce films of poly(butylene succinate) (PBS), which were then characterized using dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA). An increase of up to two-fold in the storage modulus was observed using DMA, which was dependent on the chain length of the grafted alcohol. However, no change in the glass transition temperature or degradation temperature of PBS was detected. This approach is proved efficient for tailoring the surface properties of CNCs towards excellent interfacial adhesion in their composites.

scholarly journals Impact of the Surface Properties of Cellulose Nanocrystals on the Crystallization Kinetics of Poly(Butylene Succinate)

Crystals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 196 ◽  
Author(s):  
Hatem Abushammala ◽  
Jia Mao
Keyword(s):  
Contact Angle ◽  
Surface Properties ◽  
Cellulose Nanocrystals ◽  
Toluene Diisocyanate ◽  
Scanning Calorimetry ◽  
Water Contact ◽  
Butylene Succinate ◽  
Avrami Model ◽  
Nucleation Activity ◽  
The Impact

The hydrophilicity of cellulose nanocrystals (CNCs) is a major challenge for their processing with hydrophobic polymers and matrices. As a result, many surface modifications have been proposed to hydrophobize CNCs. The authors showed in an earlier study that grafting alcohols of different chain lengths onto the surface of CNCs using toluene diisocyanate (TDI) as a linker can systematically hydrophobize CNCs to a water contact angle of up to 120° depending on the alcohol chain length. Then, the hydrophobized CNCs were used to mechanically reinforce poly(butylene succinate) (PBS), which is a hydrophobic polymer. As a result of hydrophobization, PBS/CNCs interfacial adhesion and the composite mechanical properties significantly improved with the increasing CNC contact angle. Continuing on these results, this paper investigates the impact of CNC surface properties on the crystallization behavior of PBS using differential scanning calorimetry (DSC). The results showed that the crystallization temperature of PBS increased from 74.7 °C to up to 86.6 °C as a result of CNC nucleation activity, and its value was proportionally dependent on the contact angle of the CNCs. In agreement, the nucleation activity factor (φ) estimated using Dobreva and Gutzow’s method decreased with the increasing CNC contact angle. Despite the nucleation action of CNCs, the rate constant of PBS crystallization as estimated using the Avrami model decreased in general as a result of a prevailing impeding effect. This decrease was minimized with increasing the contact angle of the CNCs. The impeding effect also increased the average activation energy of crystallization, which was estimated using the Kissinger method. Moreover, the Avrami exponent (n) decreased because of CNC addition, implying a heterogeneous crystallization, which was also apparent in the crystallization thermograms. Overall, the CNC addition facilitated PBS nucleation but retarded its crystallization, and both processes were significantly affected by the surface properties of the CNCs.

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