Abstract
Hydroxypropyl methylcellulose (HPMC) is a common hydrophilic and biodegradable polymer that can form films. This study incorporated aluminum nanoadditives as an enhancement reagent into a HPMC matrix. Mechanical properties of nanocompoistes, including the tensile strength and the elastic modulus, were analyzed with a nano-tensile tester. The incorporation of additives in HPMC films significantly enhances their mechanical and film barrier properties. Evidence of bonding between the additive and matrix was observed by Fourier-transform infrared spectrometer analysis. The additives occupy the spaces in the pores of the matrix, which increases the tendency of the pore to collapse and improves the chemical bonding between the base material and the additives. The incorporation of excess additives decreases the tensile strength due to ineffective collisions between the additives and the matrix. The wear test proves that the addition of nano-additives can improve the tribology performance of the HPMC composite while reducing the wear volume and the friction. Bonding between the nanoadditives and the matrix does not help release the nanoadditives into the wear interface as a third-body layer. The main reason to enhance the tribology performance is that the nanoadditives improve the load-capacity of the composite coating. This hybrid composite can be useful in many sustainability applications.
Highlights
Hydroxypropyl methylcellulose (HPMC) is the most commonly used hydrophilic, biodegradable polymer to form films, primarily because HPMC functions as a pH-independent and viscous gelling agent
The results show that when the HPMC substrate substrate molecular molecular chain chain is is long, long, the the mechanical mechanical properties properties
The of the analysis show that the interfacial bonding decreases due to the addition of results of the films were determined using a Spectroscopy (FTIR) analysis show that the interfacial bonding decreases due to the addition of Al
Summary
Hydroxypropyl methylcellulose (HPMC) is the most commonly used hydrophilic, biodegradable polymer to form films, primarily because HPMC functions as a pH-independent and viscous gelling agent. In other words, when the solution is heated to a critical temperature, the solution congeals into a non-flowable but semi-flexible mass This critical temperature is inversely related to the concentration of the HPMC in the solution and the concentration of the methoxy groups within the HPMC polymer. The efficacy of cellulose and its derivatives has been proposed as a possible alternative for non-degradable synthetic plastics for use in bio-based packaging applications This bio-based polymer is an attractive alternative for existing packaging materials due to its biodegradability, renewability, and large-scale availability at a relatively low cost. The mechanical properties of HPMC biopolymer films with a variety of molecular weights were investigated. High penetrability and wear protection requirements are very suitable for the application of the aluminum nanoadditive-reinforced HPMC composite
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