Thermal behavior and water absorption kinetics of polylactic acid/chitosan biocomposites

Kamaludin, Nor Helya Iman; Ismail, Hanafi; Rusli, Arjulizan; Ting, Sam Sung

doi:10.1007/s13726-020-00879-5

Cited by 26 publications

(17 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The water absorption behavior of composite materials (water diffusion behavior in composite materials) is usually represented by diffusion mechanism, which basically conforms to Fick water absorption model. [ 47 ] Compared with the unmodified DPF/NCC/PLA, the diffusion coefficients of the composites with the addition of the modifiers decreased, that is, the diffusion velocity of water molecules in the microgaps between the polymer chains decreased. [ 48 ] It may be that the interface binding between cellulose molecular chains and matrix was improved under the action of modifiers.…”

Section: Resultsmentioning

confidence: 99%

Effects of different interfacial modifiers on the properties of digital printing waste paper fiber/nanocrystalline cellulose/poly(lactic acid) composites

Zhang

et al. 2022

Polymer Engineering & Sci

View full text Add to dashboard Cite

Digital printing waste paper fiber/nano-crystalline cellulose/poly (lactic acid) (DPF/NCC/PLA) composites, modified through γ-methacryloxy propyl trimethoxy silane (KH570), isopropyl tri (dioctylpyrophosphate) titanate (TMC201), sodium hydroxide (NaOH), polyethylene glycol 6000 (PEG6000), and a composite silane coupling agent (KH570/PEG6000), were fabricated by melt blending and injection molding and the effects of different modifiers on the properties of composites were studied. Results showed that mechanical properties of the modified composites generally improved, and the best mechanical properties, including flexural, tensile and impact strength, were achieved PEG6000, KH570/PEG6000, and KH570 modification, respectively. Thermal performance analysis showed improved thermal properties of composites treated by KH570, but the crystallinity of the modified materials was increased. Both water absorption and degradation properties showed a decreasing trend, and water absorption performance was obviously improved after KH570/PEG6000 modification. Under the action of several modifiers, the diffusion coefficient, thermodynamic solubility and permeability of composites were reduced to varying degrees. Furthermore, scanning electron microscopy (SEM) demonstrated that interfacial adhesion and composite compatibility were improved with significantly fewer and smaller pores, as well as a fuzzy boundary among the three phases.

show abstract

Section: Resultsmentioning

confidence: 99%

Effects of different interfacial modifiers on the properties of digital printing waste paper fiber/nanocrystalline cellulose/poly(lactic acid) composites

Zhang

et al. 2022

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…This was attributed to the water–filler interaction because free hydroxyl groups of Cs interacted with water molecules to form hydrogen bonding, and thus enhanced water uptake. [ 43 ] However, partial replacement of Cs with HNTs in the hybrid biocomposite resulted in a gradual decrease in water uptake percentage as M sat reduced from 1.71% to 0.82% through HNTs replacement of up to 2.5 php. Similar behavior of reducing water uptake was reported in a study by Alhuthali and Low [ 44 ] on the effect of halloysite nanotubes on water absorption characteristics.…”

Section: Resultsmentioning

confidence: 99%

Effect of partial replacement of chitosan with halloysite nanotubes on the properties of polylactic acid hybrid biocomposites

Kamaludin

Ismail

Rusli

et al. 2021

Vinyl Additive Technology

Self Cite

View full text Add to dashboard Cite

In this study, hybrid chitosan/halloysite nanotubes (Cs/HNTs) reinforced polylactic acid (PLA) were prepared via melt compounding and compression molding techniques. In the fabrication of PLA/Cs/HNTs hybrid biocomposites, the partial replacement of Cs with HNTs was performed at filler loading of 2.5 parts per hundred parts of polymer (php), proceeding from the highest tensile strength of PLA/Cs obtained in our previous study. Cs was partially replaced with different HNTs loadings (0.5, 1, 1.5, 2, and 2.5) php and its effects on the functional group, thermal, tensile, morphological, and water absorption properties were investigated systematically. The results revealed that the combined loading of 1 php Cs and 1.5 php HNTs hybrid fillers into PLA showed the best performance in all properties. Fourier transform infrared spectroscopy (FTIR) analysis indicated that the siloxane (SiO) group of HNTs had chemically interacted with the amine group of Cs. The thermal analysis demonstrated that partial replacement of Cs with 1.5 php HNTs improved the thermal stability of PLA/2.5Cs/0HNTs biocomposite by ~12%. Yet, the percentage of crystallinity (χc) reduced with HNTs addition due to the phase adhesion improvement. Moreover, PLA/1Cs/1.5HNTs hybrid biocomposites showed the highest tensile strength and elongation at break of 59 MPa and 2.72%, respectively. This correlated with the uniform dispersion and better interfacial adhesion between Cs/HNTs fillers in the PLA matrix, as confirmed by the field emission scanning electron microscopy (FESEM). In addition, partial replacement of Cs with HNTs exhibited a lower water absorption percentage, which suggested the advantage of hybrid fillers to reduce water uptake, and is beneficial in a wide range of applications.

show abstract

“…20 Previous literature reported that PLA/Cs biocomposite had enhanced the polymer degradability after 150 days of burying 21 and exhibited a strong antibacterial ability against Escherichia coli. 8 Despite of that, Cs inclusion of up to 10 php had lowered the thermal stability of the prepared PLA/Cs biocomposite as reported by Kamaludin et al 22 Similarly, Cs addition resulted in a remarkable drop of tensile strength, Young's modulus, and elongation at break in the studies conducted by Rapa et al 23 Therefore, the surface modification by chemical treatment was introduced to Cs filler in order to alter the molecular stability and reactivity in the polymer network structure. Several natural additives had been explored as a potential modifier agent in Cs polymer, including citric acid, 24,25 caffeic acid, 26,27 gallic acid, [28][29][30] and tannic acid.…”

mentioning

confidence: 84%

“…The results obtained were then compared with the untreated PLA/Cs biocomposite gathered in our previous studies. 22,39 2 | EXPERIMENTAL METHODS…”

mentioning

confidence: 99%

Properties enhancement of chitosan‐filled polylactic acid biocomposites using tannic acid treatment

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this study, tannic acid-treated chitosan (Cs-TA)-filled polylactic acid (PLA) biocomposites were fabricated through the melt blending and compression molding methods. The effects of 5, 7.5,and 10) php on chemical interaction, tensile, melt processing, thermal, water absorption, and morphological characteristics were analyzed accordingly, and compared with a previously untreated PLA/Cs biocomposite. Fourier transform infrared spectroscopy analysis revealed that TA could form a cross-linked network with Cs components as well as improving the hydrophilicity character of Cs for better interaction with PLA polymer. In addition, tensile strength and elongation at break were enhanced to the extent of ~3% and ~11%, respectively, at optimal 3% w/v TA concentration and 2.5 php Cs loading. Melt processing analysis of treated PLA/Cs-TA demonstrated a lower stabilization torque, which implied improvement in the PLA processability. Moreover, chemical modification of Cs with TA showed a positive effect on thermal stability correlated to a higher decomposition temperature. Meanwhile, the crystallinity degree was considerably increased with TA treatment ascribed to the acceleration in crystallization process. Besides, a lower water uptake percentage proposed the Cs-TA potential in controlling water uptake in PLA/Cs biocomposite. Indeed, the morphological analysis exhibited better filler dispersion and interfacial adhesion between Cs-TA and PLA polymer, which justified the enhancement in all studied properties.

show abstract

Thermal behavior and water absorption kinetics of polylactic acid/chitosan biocomposites

Cited by 26 publications

References 43 publications

Effects of different interfacial modifiers on the properties of digital printing waste paper fiber/nanocrystalline cellulose/poly(lactic acid) composites

Effects of different interfacial modifiers on the properties of digital printing waste paper fiber/nanocrystalline cellulose/poly(lactic acid) composites

Effect of partial replacement of chitosan with halloysite nanotubes on the properties of polylactic acid hybrid biocomposites

Properties enhancement of chitosan‐filled polylactic acid biocomposites using tannic acid treatment

Contact Info

Product

Resources

About