Effect of different amounts of bamboo charcoal on properties of biodegradable bamboo charcoal/polylactic acid composites

Zou, Dongfang; Zheng, Xiaotong; Ye, Yunpeng; Yan, Dong; Xu, Hao; Si, Shuang; Li, Xingong

doi:10.1016/j.ijbiomac.2022.06.209

Cited by 22 publications

(4 citation statements)

References 35 publications

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“…It has been reported that BC has a self-lubricating effect [10]; when the BC was added to the BPC, the BC, with the benefit of its self-lubricating effect, would fill the gaps between bamboo fiber and PLA [42]. Furthermore, Porous BC and PLA molecular chains would form a cross-linked structure, when the PLA particle was thoroughly melted, the PLA molecular chains could stretch into the porosity of BC, forming a van der Waals force and mechanical interlocking [43]. The three phases of PLA, bamboo fiber, and bamboo charcoal formed a ternary system.…”

Section: Mechanical Property Analysis Of Bpcsmentioning

confidence: 99%

Mechanical and Antibacterial Properties of Bamboo Charcoal/ZnO-Modified Bamboo Fiber/Polylactic Acid Composites

Liu,

Zhang,

Yan

et al. 2024

Forests

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In this study, biodegradable bamboo fiber/PLA composites (BPCs) modified using bamboo charcoal (BC)/ZnO were prepared. The effects of BC/ZnO addition on the mechanical properties and antibacterial properties of BPCs were investigated. The chemical structure, microscopic morphology, and crystallization of the composites were analyzed using FTIR, SEM, and XRD, respectively. The results showed that in terms of mechanical strength, when the addition of BC was 2%, the tensile impact and flexural strength of the BPCs were most obviously improved, with a tensile strength of 51.6 MPa. However, when the addition of BC was more than 2%, the uneven dispersion of too much BC in the BPCs resulted in a reduction in their mechanical strength. A certain amount of ZnO did not affect the crystallinity of the BPCs. In addition, the uneven distribution of ZnO and its poor compatibility with PLA resulted in a deterioration in the tensile properties of the BPCs. In terms of antibacterial properties, when 2% ZnO was added, the BPCs had better antibacterial properties against Escherichia coli and Staphylococcus aureus, with values of 58.9% and 52.5% against both, respectively. BPC biodegradable materials with both mechanical strength and antimicrobial properties have promising medical uses.

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Section: Mechanical Property Analysis Of Bpcsmentioning

confidence: 99%

Mechanical and Antibacterial Properties of Bamboo Charcoal/ZnO-Modified Bamboo Fiber/Polylactic Acid Composites

Liu,

Zhang,

Yan

et al. 2024

Forests

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“…You et al [ 23 ] reported highly filled (up to 80%) bamboo charcoal powder-reinforced ultrahigh-molecular-weight polyethylene; Ho et al [ 24 ] improved the mechanical, thermal and optical properties of PLA biocomposites using bamboo biochar. Zou et al [ 25 ] investigated the effect of additional amounts of bamboo charcoal on mechanical and combustion properties of biodegradable BC/PLA composites; Sheng et al [ 26 ] prepared a high-toughness PLA/bamboo cellulose nanowhisker bionanocomposite strengthened with silylated ultrafine bamboo-char; better mechanical properties were also obtained through bamboo charcoal as reinforcing fillers for polypropylene composites [ 27 ] when compared to coconut shell charcoal. Other versatile BC-based composites [ 28 , 29 , 30 , 31 ] featured with absorptive, conductive, or electromagnetic interference are typically followed with interest by researchers; it seems that this commercially available biochar has a particular meaning in the applications of polymer composites.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Phytic Acid/Urea Co-Modified Bamboo Biochar and Its Application as Green Flame Retardant for Polylactic Acid Resins

Zhong¹,

Wang²,

Sun³

et al. 2023

Polymers

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It is of great significance to develop green, sustainable additives to improve the thermal stability and flame retardancy of biopolymers. In this work, a synergistic modification of P/N elements to bamboo biochar (mBC) was successfully achieved by grafting a reaction of phytic acid and urea with preoxidized bamboo biochar. Fourier transform infrared spectroscopy, X-ray diffraction, nuclear magnetic resonance and scanning electron microscope determinations of the mBC demonstrated a successive grafting of phytic acid and urea to the originally porous surface. The ground mBC was blended with polylactic acid (PLA) to prepare mBC/PLA composites by extrusion and hot pressing. Mechanical strength studies showed a compromise in rigidity, which might originate from the mBC overdose and its limited miscibility with the resin. The thermogravimetric results supported the fact that the enhancement of thermal stability and flame retardancy of the composites with the mBC dosage, which showed that the mBC dosage in the PLA composites was not only lower than that of the conventional flame retardants, but also outperformed the counterparts using BC modified by inorganic phosphoric acid and urea. The mBC was prone to accelerate the earlier decomposition of the composites (30 °C lower in decomposition) and generate a continuous, dense residual carbon layer, which provides an effective shield resisting the mass and heat transfer between the combustion area and the underlying composite matrix. Only 10 wt% of mBC dosage could achieve a V-0 rating (UL94) for the composite, with a higher limiting oxygen index up to 28.3% compared to 20.7% for that of the virgin PLA; the cone colorimetric results also suggested that the flame retardancy had been greatly improved for all composites. In this work, biobased P-/N-containing bamboo biochar would be expected as a nontoxic biochar-based flame retardant that serves as green filler in polymer composites.

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“…Pine wood (alone [ 21 ] and in combination with wool [ 24 ]), bamboo [ 26 ], oil seed rape [ 27 ], rice husk [ 27 , 28 ], and corn straw [ 28 , 29 ] derived biochars have been tested for improving polymer flame-retardant properties. In all the studied cases, a decrease in the peak heat release rate was observed because of the compact char layer that was effective in enhancing the insulation properties of the underlying polymer.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hemp Hurd Biochar and Humic Acid on the Flame Retardant and Mechanical Properties of Ethylene Vinyl Acetate

Maro¹,

Faga²,

Pedraza³

et al. 2023

Polymers

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In this work, the combination of biochar produced through a pyrolytic process of hemp hurd with commercial humic acid as a potential biomass-based flame-retardant system for ethylene vinyl acetate copolymer is thoroughly investigated. To this aim, ethylene vinyl acetate composites containing hemp-derived biochar at two different concentrations (i.e., 20 and 40 wt.%) and 10 wt.% of humic acid were prepared. The presence of increasing biochar loadings in ethylene vinyl acetate accounted for an increasing thermal and thermo-oxidative stability of the copolymer; conversely, the acidic character of humic acid anticipated the degradation of the copolymer matrix, even in the presence of the biochar. Further, as assessed by forced-combustion tests, the incorporation of humic acid only in ethylene vinyl acetate slightly decreased both peaks of heat release rate (pkHRR) and total heat release (THR, by 16% and 5%, respectively), with no effect on the burning time. At variance, for the composites containing biochar, a strong decrease in pkHRR and THR values was observed, approaching −69 and −29%, respectively, in the presence of the highest filler loading, notwithstanding, for this latter, a significant increase in the burning time (by about 50 s). Finally, the presence of humic acid significantly lowered the Young’s modulus, unlike biochar, for which the stiffness remarkably increased from 57 MPa (unfilled ethylene vinyl acetate) to 155 Mpa (for the composite containing 40 wt.% of the filler).

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Effect of different amounts of bamboo charcoal on properties of biodegradable bamboo charcoal/polylactic acid composites

Cited by 22 publications

References 35 publications

Mechanical and Antibacterial Properties of Bamboo Charcoal/ZnO-Modified Bamboo Fiber/Polylactic Acid Composites

Mechanical and Antibacterial Properties of Bamboo Charcoal/ZnO-Modified Bamboo Fiber/Polylactic Acid Composites

Fabrication of Phytic Acid/Urea Co-Modified Bamboo Biochar and Its Application as Green Flame Retardant for Polylactic Acid Resins

Effect of Hemp Hurd Biochar and Humic Acid on the Flame Retardant and Mechanical Properties of Ethylene Vinyl Acetate

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