Tailoring Interfacial Adhesion between PBAT Matrix and PTFE-Modified Microcrystalline Cellulose Additive for Advanced Composites

Wang, Hongkun; Liu, Xuran; Liu, Jinfeng; Wu, Min; Huang, Yong

doi:10.3390/polym14101973

Cited by 5 publications

(3 citation statements)

References 42 publications

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“…Now, PTFE is used in many studies to improve the properties of composites and as an additional coating. PTFE has a number of pre-benefits, including its non-stick properties [48], wear resistance [50], high melting point [51], low coefficient of friction [52], strong insulating properties for electrostatic capacitors [53], etc. For example, in [54], PTFE is used as a sputter on mild steel Q235B, which leads to an increase in the corrosion resistance of the material.…”

Section: Discussionmentioning

confidence: 99%

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

Bogdanova,

Kamenskikh,

Nosov

2023

Designs

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Polymers have gained a foothold in the international market and are actively utilized at a large scale in various industries. They are used as sliding layers in various types of friction units. However, there is a lack of research on their deformation behavior under different design conditions. This work is focused on studying the influence of the geometrical design of lubrication recesses in a polymer sliding layer operating under conditions of frictional contact interaction. The article investigated an element of bridge-bearing steel plate with recesses for lubrication. Two geometrical configurations of recesses are studied: the annular groove and spherical well in the engineering software package ANSYS Mechanical APDL. Polytetrafluoroethylene (PTFE) is considered an elastic-plastic sliding layer. A comparative analysis of two models with different geometrical configurations of cutouts for lubrication, with/without taking into account its volume in the recess, has been conducted. The article establishes that in the absence of lubrication in the recesses, large deformations of the polymer sliding layer occur. This effect negatively affects the structure as a whole. Changing the geometry of the recess for lubrication has the greatest effect on the intensity of plastic deformations. Its maximum level is lowered by almost ~60% when spherical notches are used for lubrication instead of grooves. The friction coefficient of the polymer has a great influence on the contact tangential stress. At the experimental coefficient of friction, it is lowered on average by ~85%. The friction coefficient of the lubricant has almost no effect on the deformation of the cell (<1%).

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Section: Discussionmentioning

confidence: 99%

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

Bogdanova,

Kamenskikh,

Nosov

2023

Designs

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“…Cellulosic materials are promising candidates owing to abundant resources and low cost. Natural plant fibers − and microcrystalline cellulose (MCC) − have been used to reinforce PBAT. The corresponding composites showed significant improvements in tensile modulus, but the tensile strength and elongation at break decreased dramatically.…”

Section: Introductionmentioning

confidence: 99%

Biodegradable Poly(butylene adipate-co-terephthalate) Nanocomposites Reinforced with In Situ Fibrillated Nanocelluloses

Wang,

Jin,

Lim

et al. 2023

ACS Sustainable Chem. Eng.

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The enhancement of mechanical properties is highly required for the expanded applications of biodegradable polymers like poly(butylene adipate-co-terephthalate) (PBAT). The use of nanocellulose as reinforcing fillers is one of the effective approaches while preserving the biodegradability of polymers, but the dispersion of nanofibers in polymer matrixes is a great challenge. Here, we report an in situ fibrillation method to prepare nanocellulose-reinforced PBAT composite films with superior mechanical properties and enhanced degradability while promoting the easy dispersion of natural plant fibers in the polymer matrix, which overcome the limitation of natural fiber composites for thin film applications. A hemicellulose-rich holocellulose fiber was selected and silanized prior to melt compounding with PBAT, in which in situ fibrillation of fibers and the dispersion of in situ fibrillated cellulose nanofibrils (CNFs) occurred simultaneously. The nanostructure, mechanical properties, and degradability of the resulting composite films were characterized. Compared with pristine PBAT, the incorporation of 1 wt % CNF fillers increased the tensile modulus by 82% while possessing a tensile strength of 26 MPa, an elongation of 372%, and a toughness of 75 MJ/m 3 , surpassing most reported data. Moreover, the degradability of PBAT was enhanced as well. Altogether, this study paves a new way of making biodegradable nanocomposites, which expand the application areas, especially where films are required.

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“…In the work of Wang et al, to make PTFE-coated MCC, a simple mechanical ball milling procedure was changed, and the surface energy of the modified MCC was controlled by adding various amounts of PTFE. The composites' elongation at break rose by 28.8%, their tensile strength by 5.1%, their crystallization temperature by roughly 6 ℃, and their storage modulus by 42.9% [26]. To create the PEGMA anchored MCC, Hong et colleagues successfully modified MCC with a poly(ethylene-coglycidyl methacrylate) copolymer (PEGMA).…”

Section: Introductionmentioning

confidence: 99%

Microcrystalline cellulose grafted hyperbranched polyester with roll comb structure for synergistic toughening and strengthening of PHBV/ bio-based polyester elastomer composites

Han¹,

Han

Jin

et al. 2023

Preprint

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The brittle feature of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is the major challenge that strongly restricts its application at present. Successfully synthesized bio-based engineering polyester elastomers (BEPE) were combined with PHBV to create entirely bio-composites with the intention of toughening PHBV. Herein, the 2,2-Bis(hydroxymethyl)-propionic acid (DMPA) was grafted onto microcrystalline cellulose (MCC) and then further transformed into hyperbranched polyester structure via polycondensation. The modified MCC, named MCHBP, had plenty of terminal hydroxyl groups, which get dispersed between PHBV and BEPE. Besides, a large number of terminal hydroxyl groups of MCHBP can interact with the carbonyl groups of PHBV or BEPE in a wide range of hydrogen bonds, and subsequently increase the adhesion and stress transfer between the PHBV and BEPE. The tensile toughness and the elongation at break of the PHBV/BEPE composites with 0.5phr MCHBP were improved by 559.7% and 221.8% in comparison to those of PHBV/BEPE composites. Results also showed that MCHBP can play a heterogeneous nucleation effect on the crystallization of PHBV. Therefore, this research can address the current issue of biopolymers' weak mechanical qualities and may have uses in food packaging.

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Tailoring Interfacial Adhesion between PBAT Matrix and PTFE-Modified Microcrystalline Cellulose Additive for Advanced Composites

Cited by 5 publications

References 42 publications

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

Biodegradable Poly(butylene adipate-co-terephthalate) Nanocomposites Reinforced with In Situ Fibrillated Nanocelluloses

Microcrystalline cellulose grafted hyperbranched polyester with roll comb structure for synergistic toughening and strengthening of PHBV/ bio-based polyester elastomer composites

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