Effect of Microcrystalline Cellulose on the Properties of PBAT/Thermoplastic Starch Biodegradable Film with Chain Extender

Abstract

Poly (butylene adipate-co-terephthalate) (PBAT) is a fully biodegradable polymer with toughness and ductility. It is usually compounded with thermoplastic starch (TPS) to balance the cost for manufacturing biodegradable films such as disposable plastic bags. However, blending with TPS reduces valuable tensile strength, which limits the bearing capacity of PBAT film. In this study, microcrystalline cellulose (MCC) was employed as a reinforcement to strengthen the PBAT/TPS biodegradable film. The effect of MCC content on the mechanical, thermal, and morphological properties of the composite film were investigated. The optimal tensile strength and elongation at break reached 5.08 MPa and 230% when 4% MCC was added. The thermal stability and thermal resistance were improved with the addition of MCC; for example, Tmax increased by 1 °C and Tonset increased by 2–8 °C. Moreover, good compatibility among PBAT, TPS, and MCC can be achieved when the MCC content was below 6%. Consequently, the optimal MCC content was found to be 4%. These results could provide experimental data and method support for preparing high-performance PBAT hybrid films.

Preparation and characterization of green‐based anti‐ultraviolet and antidripping biodegradable film

“…As the more MFC added, the more weight loss ratio obtained at around 400°C. In addition, Figure 2a shows that a new thermal decomposition stage occurs at around 350°C when adding 5 or 10 g of MFC, this phenomenon shows that the addition of MFC has a certain effect on the thermal stability of the composite films 22 . However, in Figure 2b, the amount of SPI has no effect or less effect on the thermal stability of composite films, and the weight‐loss peak also appeared at 400°C.…”

Alkaline pretreatment and steam explosion process on coffee silverskin and incorporation of cellulose fibers in poly(butylene adipate‐co‐terephthalate)

“…44,[67][68][69] The incorporation of SEW4 fibers in the PBAT matrix had practically no influence on the thermal stability of the materials, with T onset , T 10% , and T max values remaining practically equal to those of neat PBAT. Some authors reported that excessive fiber contents may inhibit the chain slip because of agglomeration, leading to slightly weaker thermal stabilities 70,71 ; however, the results found were still similar to the neat PBAT.…”

Bamboo powders effectively reinforcing the modulus of PBAT composites and its reinforce mechanism

“…According to Fig. 8, it can be observed that PBAT has ve characteristic re ection peaks at 16.3°, 17.4°, 20.2°, 23.1° and 25.0°, corresponding to (011), ( 010), ( 110), ( 100) and (111) crystal planes, indicating that PBAT is an α-type trigonal stacking structure [21]. The diffraction angle of llers (K-BP, K-WP and K-CP) should show 2θ 22.5° of cellulose [22], which overlaps with the PBAT crystalline peak.…”