Construction of highly ductile, UV-shielding polylactide/poly(butylene adipate-co-terephthalate) biocomposites with hyperbranched polysiloxane functionalized lignin as a biocompatibilizer

Wu, Wei; Huang, Jingshu; Zhao, Wanjing; Zhang, Qunchao; Cao, Xianwu; Li, Xiaolei; Li, Robert K.Y.

doi:10.1016/j.ijbiomac.2023.124943

Cited by 4 publications

(1 citation statement)

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“…Hybridization is thought to be an approach that solves all problems related to the structure and properties of heterogeneous blends and composites. All kinds of hybrids are prepared from a very wide variety of materials, including the combination of three polymers [ 47 , 48 , 49 , 50 , 51 , 52 , 53 ], two polymers and a filler [ 54 , 55 , 56 , 57 ] or fiber [ 58 , 59 , 60 ], or a polymer matrix and two reinforcements [ 61 , 62 , 63 , 64 , 65 ], and significant improvement in properties as well as the synergistic effect of the components are claimed in the majority of cases [ 63 , 64 , 65 ]. However, hybridization raises many questions, and without addressing them, the claimed property improvement might not occur.…”

Section: Introductionmentioning

confidence: 99%

Interactions, Structure and Properties of PLA/lignin/PBAT Hybrid Blends

Pregi,

Romsics,

Várdai

et al. 2023

Polymers

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Poly(butylene adipate-co-terephthalate) (PBAT) was added to poly(lactic acid) (PLA)/lignin blends to decrease the considerable stiffness and brittleness of the blends. Two- and three-component blends were prepared in a wide composition range through homogenization in an internal mixer followed by compression molding. Interactions among the components were estimated by comparing the solubility parameters of the materials used and through thermal analysis. Mechanical properties were characterized by tensile testing. The structure of the blends was studied using scanning electron (SEM) and digital optical (DOM) microscopy. The results showed that the interactions between PBAT and lignin are somewhat stronger than those between PLA and the other two components. The maleic anhydride grafted PLA added as a coupling agent proved completely ineffective; it does not modify the interactions. The structural analysis confirmed the immiscibility of the components; the structure of the blends was heterogeneous at each composition. A dispersed structure formed when the concentration of one of the components was small, while, depending on lignin content, an interpenetrating network-like structure developed and phase inversion took place in the range of 30–60 vol% PBAT content. Lignin was located mainly in the PBAT phase. Properties were determined by the relative amount of PBAT and PLA; the addition of lignin deteriorated properties, mainly the deformability of the blends. Other means, such as reactive processing, must be used to improve compatibility and blend properties. The results contribute considerably to a better understanding of structure–property correlations in lignin-based hybrid blends.

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Section: Introductionmentioning

confidence: 99%

Interactions, Structure and Properties of PLA/lignin/PBAT Hybrid Blends

Pregi,

Romsics,

Várdai

et al. 2023

Polymers

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Preparation of poly(lactic acid) grafted glycidyl neodecanoate by solid phase grafting and its compatibilization for poly(lactic acid)/poly(butylene adipate‐co‐terephthalate) composite

Chen,

et al. 2024

Polymer Engineering & Sci

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Poly(lactic acid) (PLA) grafted glycidyl neodecanoate (GND) with a single epoxy group (PLA‐GND) is prepared in this paper by solid phase grafting, and the effects of different reaction conditions on the grafting percentage of PLA‐GND are investigated. Furthermore, PLA‐GND is used as a nonreactive compatibilizer to prepare PLA‐GND/PLA/poly(butylene adipate‐co‐terephthalate) (PBAT) composite by melt blending. The results show that PLA‐GND has the highest grafting percentage of 2.15% when the feed weight ratio of GND to PLA is 0.2, the feed weight ratio of triphenylphosphine to PLA is 0.02, the additive amount of xylene is 1 mL, the reaction temperature is 120°C, and the reaction time is 115 min. The GND segments of PLA‐GND and PBAT segments could form a physical entanglement microdomain because of the similar aliphatic chain of GND and PBAT, which would improve the compatibility of PLA and PBAT. PLA‐GND/PLA/PBAT composite has the highest tensile strength, elongation at break, impact strength, crystallinity, heat deformation temperature, and melt flow rate at a PLA‐GND content of 5%, which are 38.54 MPa, 118.65%, 15.83 kJ/m2, 5.71%, 65.3°C, and 36.3 g/10 min, 14.53%, 390.90%, 68.94%, 224.43%, 16.19%, and 224.40% higher than those of PLA/PBAT composite, respectively.Highlights PLA grafted GND with a single epoxy group is prepared by solid phase grafting. PLA‐GND as a non‐reactive compatibilizer compatibilizes PLA/PBAT composite. The similar chain of GND and PBAT is helpful to form the physical entanglement. The physical entanglement is essential to improve compatibility of PLA and PBAT. PLA/PBAT composite has excellent overall performance at a PLA‐GND content of 5 wt%.

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