Clean and sustainable biocomposites based on supramolecular interactions induced thermoplasticization of wheat straw powders

Dong, Shunping; Yuan, Fen; Yang, Lijun; Chi, Shuai; Zhong, Jiahui; Lei, Jingxin; Bao, Lixia; Wang, Jiliang

doi:10.1016/j.jclepro.2019.06.101

Cited by 17 publications

(1 citation statement)

References 25 publications

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“…In addition, the advantageous properties of bio-based polymers and natural fibers were combined in their composites in several cases [1,18,24]. Among lignocellulosic fillers, many types of harvest wastes have been studied as well, including rice hulls [25], wheat straw [26], sugarcane bagasse [27], corn cobs [28], sunflower stalks [29], etc.…”

Section: Introductionmentioning

confidence: 99%

The Role of Interfacial Adhesion in Polymer Composites Engineered from Lignocellulosic Agricultural Waste

et al. 2021

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This paper presents a comprehensive study about the application of a lignocellulosic agricultural waste, sunflower husk in different polymer composites. Two types of milled sunflower husk with different geometrical factors were incorporated into polypropylene, low-density and high-density polyethylene, polystyrene (PS), glycol-modified polyethylene terephthalate (PETG) and polylactic acid (PLA). The filler content of the composites varied between 0 and 60 vol%. The components were homogenized in an internal mixer and plates were compression molded for testing. The Lewis–Nielsen model was fitted to the moduli of each composite series, and it was found that the physical contact of the filler particles is a limiting factor of composite modulus. Interfacial interactions were estimated from two independent approaches. Firstly, the extent of reinforcement was determined from the composition dependence of tensile strength. Secondly, the reversible work of adhesion was calculated from the surface energies of the components. As only weak van der Waals interactions develop in the interphase of polyolefins and sunflower husk particles, adhesion is weak in their composites resulting in poor reinforcement. Interfacial adhesion enhanced by specific interactions in the interphase, such as π electron interactions for PS, hydrogen bonds for PLA, and both for PETG based composites.

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