Enhanced mechanical and biodegradable properties of PBAT/lignin composites via silane grafting and reactive extrusion

Liu, Yuanyuan; Liu, Shan; Liu, Zhentao; Yang, Lei; Jiang, Siyuan; Zhang, Kai; Yan, Wei; Qin, Jun; He, Min; Qin, Shuhao; Yu, Jianxing

doi:10.1016/j.compositesb.2021.108980

Cited by 76 publications

(45 citation statements)

References 48 publications

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“…Yang et al 37 blended maleic anhydride‐modified ligninsulfonate nanoparticles (MLSs) with PBAT, the PBAT/MLS composite with 5 wt% MLS exhibited the tensile strength of 18 MPa and elongation at break of 1100%, which was 15% and 38% higher than that of PBAT. Liu et al 38 blended vinyltrimethoxysilane‐grafted lignin (VL) with PBAT, the PBAT composite with 30 wt% vinyltrimethoxysilane‐grafted lignin (PBAT/VL‐30%) exhibited the tensile strength of 55.9 MPa, which was increased by 200% compared with pristine PBAT (18.6 MPa), while the elongation at break of PBAT/VL‐30% reduced to 268.0%, which was decreased by 56% compared with pristine PBAT (612%). Kargarzadeh et al 39 blended kraft lignin with PBAT, the PBAT composite with 6 wt% kraft lignin exhibited the tensile strength of 17.0 MPa and the elongation at break of 545.1%, which was decreased by 13% and 5%, respectively, compared with pristine PBAT.…”

Section: Introductionmentioning

confidence: 99%

Lignin modified PBAT composites with enhanced strength based on interfacial dynamic bonds

Huang

Liu

et al. 2022

J of Applied Polymer Sci

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Poly(butylene adipate‐co‐terephthalate) (PBAT) is a type of synthetic biodegradable thermoplastic copolyester with comparable mechanical properties to polyethylene, but the application of PBAT is limited by factors such as high cost, short shelf life, poor weather and water resistance. In order to develop PBAT composites with high performance and low cost, lignin‐modified PBAT biocomposites with enhanced tensile strength were prepared via in‐situ construction of interfacial dynamic bonds. Zinc stearate and epoxy soybean oil were introduced as the interfacial modifiers to construct dynamic bonds between lignin and PBAT, so as to improve the interfacial compatibility. The results demonstrated that the lignin/PBAT biocomposite with interface modifiers reached the maximum tensile strength of 36.7 MPa and an elongation at break of 725.3% at the lignin content of 5 wt%, with the tensile strength achieved 5% improvement on the basis of pure PBAT (34.9 MPa and 717.6%). When the lignin content was increased to 10 wt%, the lignin/PBAT biocomposite with interfacial modifiers still maintained the tensile strength of 35.4 MPa and the elongation at break of 627.8%, which was 82% and 31% higher than that of the directly compounded sample without interfacial modifiers, respectively. Even when the content of lignin loading increased to 20 and 30 wt%, the mechanical properties of the composites were still significantly improved by adding modifiers. The hydrophobicity of the composite was also improved after in‐situ interfacial modification. The strategy demonstrated in this work provides an effective reference for the development of lignin/PBAT composites with high performance but low cost.

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Section: Introductionmentioning

confidence: 99%

Lignin modified PBAT composites with enhanced strength based on interfacial dynamic bonds

Huang

Liu

et al. 2022

J of Applied Polymer Sci

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“…These peaks are characterized as reference peaks for PCL polymer and indicative for its semi‐crystalline nature 36 . Overall, the XRD pattern showed that PLA is amorphous 37 whereas PBAT and PCL are crystalline polymer 38,39 …”

Section: Resultsmentioning

confidence: 93%

“…36 Overall, the XRD pattern showed that PLA is amorphous 37 whereas PBAT and PCL are crystalline polymer. 38,39 In addition, the diffractogram of samples that fabricated by FDM shows lower pattern compare to the CM could be related to the CM samples have higher crystallinity compared to the FDM samples. The temperature of processing also contributes significantly in which the FDM samples have been exposed to the temperature at shorter time in comparison to the CM samples.…”

Section: X-ray Diffractometermentioning

confidence: 99%

Comparison of physical and mechanical properties of biodegradable polybutylene adipate terephthalate, polycaprolactone, and poly(lactic acid) fabricated via fused deposition modeling and conventional molding

Sabee

Tajuddin

Ishak

et al. 2022

J of Applied Polymer Sci

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The research work aims to compare the physical and mechanical properties of biodegradable polybutylene adipate terephthalate (PBAT), polycaprolactone (PCL), and poly(lactic acid) (PLA) fabricated via fused deposition modeling (FDM) and conventional compression molding (CM) method. It was found that the thermal stability was comparable for sample fabricated using both techniques. The percentage difference for the density measurement was 7.4%. The water absorption of FDM samples was about 75.5% higher compared to those fabricated using the CM due to higher porous structures obtained. The results also showed that the FDM did not significantly affect the materials' crystallinity, however the flowability increases by 25.2%. The tensile strength, tensile modulus, elongation at break (E b ), impact strength, and water contact angle of FDM samples were approximately 25.5%, 25.0%, 46.4%, 50.3%, and 20.7% lower compared to the CM samples.

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“…The main peaks of the SL were observed at 6.56 ppm for the aromatic and at 3.40 ppm for the methoxyl groups. [ 40 ] After the silane modification, the characteristic peaks in the ethylene silane modified SL at 5.99–5.61 ppm were assigned to the ethylene (CH 3 )CH 2 groups, [ 41 ] and in the epoxy silane modified SL the peaks at 3.19–3.16 ppm were assigned to the epoxy groups. [ 42 ] Furthermore, new peaks occurred at 4.01–3.70 ppm on both the modified SL samples which were assigned to SiOCH 2  groups.…”

Section: Resultsmentioning

confidence: 99%

Composite waterborne polyurethane reinforced with silane modified lignin as an adhesive between polypropylene decorative films and wood‐based panels

Chang

Luo

Gao

et al. 2022

Polymer Engineering & Sci

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To improve the surface bonding strength of polypropylene (PP) decorative films on wood-based panels, one kind of lignin, namely sodium lignosulfonate (SL) filled waterborne polyurethane (WPU) composites were used as adhesives on the back of the PP decorative films, and the SL was modified by the addition of two alternative types of silane that contain either ethylene-acyloxy or epoxy groups. The PP decorative films were hot-press onto plywood using the different types of SL modified WPU as an adhesive. The SL and SL modified WPU were characterized comprehensively. The surface properties the PP decorative films on plywood surfaces were tested. The results showed that both types of silane can be grafted on the SL between hydrolyzed Si OH groups and OH groups. The long organic chain of silane can physically twist to the WPU, where self-polymerization of the silane helps to form network structures. As a result, the surface bonding strength of PP decorative films on plywood surfaces largely improved with SL filled WPU adhesives and no detachment occurred in boiling water. Compared with the ethylene-acyloxy silane, the epoxy silane performed better which was associated with the reactions between the epoxy groups and free water.

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Enhanced mechanical and biodegradable properties of PBAT/lignin composites via silane grafting and reactive extrusion

Cited by 76 publications

References 48 publications

Lignin modified PBAT composites with enhanced strength based on interfacial dynamic bonds

Lignin modified PBAT composites with enhanced strength based on interfacial dynamic bonds

Comparison of physical and mechanical properties of biodegradable polybutylene adipate terephthalate, polycaprolactone, and poly(lactic acid) fabricated via fused deposition modeling and conventional molding

Composite waterborne polyurethane reinforced with silane modified lignin as an adhesive between polypropylene decorative films and wood‐based panels

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