Preparation of artificial wood films with controlled biodegradability

Biodegradable poly(butylene adipate-co-terephthalate) (PBAT) films incorporated with different levels of the antimicrobial peptide nisin were developed by melt processing. Structural, morphological, thermal, mechanical, and antimicrobial properties of the films were determined. The X-ray diffraction patterns exhibited decreasing levels of intensity at 2h values as the concentration of nisin increased. Scanning electron microscopy showed a heterogeneous morphology when higher amounts of nisin were incorporated. The antimicrobial films tested presented no significant differences in the melting temperature (123-1258C), and the crystallization temperature ranged from 69 to 758C. The addition of nisin caused no significant modification in tensile strength values. However, results of Young's modulus and deformation at break differed significantly among samples. Active films demonstrated inhibition against the Gram-positive bacterium Listeria monocytogenes. These results demonstrated that PBAT/nisin films produced by melt processing present a great potential for use as active food packaging materials aiming enhanced food safety. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43212.

“…As a consequence, the values of tensile tests were modified (Table ). Kim et al . also reported a poor interfacial interaction between PBAT and starch.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of melt processing on biodegradable nisin‐PBAT films intended for active food packaging applications

Zehetmeyer

Meira

Scheibel

et al. 2015

“…Polymeric reactive compatibilizer with functionalities like isocyanates, silane, and oxazoline could be used as compatibilizer in immiscible polymer blends. According to Kim et al ., the polymeric methylene diphenyl diisocyanate (pMDI) was used as compatibilizing agent in PBAT/starch blends. The compatibilized PBAT/starch exhibits higher tensile strength than its uncompatibilized counterparts.…”

Section: Principle and Mechanism Of In Situ Compatibilization Of Polymentioning

confidence: 99%

Biodegradable compatibilized polymer blends for packaging applications: A literature review

Muthuraj

Misra

Mohanty

2017

294

183

The majority of materials used for short-term and disposable packaging application are non-biodegradable which are not satisfying the demands in environmental safety and sustainability. Biodegradable polymers are an alternative for these nonbiodegradable materials. The biodegradable polymeric materials can degrade in a reasonable time period without causing environmental problems. However, biodegradable polymers possess some limitations such as comparatively high cost, insufficient mechanical performances, and inferior thermal stability to extend their widespread application in packaging industry. To overcome these limitations, one of the most commonly used strategies is melt blending of dissimilar biodegradable polymers. Unfortunately, most of the biodegradable polymer blends exhibit insufficient performance because they are thermodynamically immiscible as well as exhibit poor compatibility between the blended components. It has been established that the compatibilization is a well-known strategy to improve the performances of the immiscible biodegradable polymer blends by enhancing the adhesion between the phases. As a result, recent studies focus on various compatibilizers to enhance the performances of the resulting biodegradable polymer blends. This review summarizes the recent developments on a variety of biodegradable polymer blends compatibilized by melt processing with a main focus of ex situ and in situ compatibilization strategies.

“…This improvement was also much higher than that of the PBAT/sugar beet pulp green composite (3.6 times) . On the other hand, the rigid fillers including SHR may restrict molecular mobility of the PBAT matrix, reflecting a reduced tendency of plastic deformation after yield . The tensile ductility was monotonously decreased with increasing SHR content.…”

Section: Resultsmentioning

confidence: 83%

“…Research of natural fiber‐reinforced PBAT composites has also received great attentions. For example, PBAT has been blended with starch, soy protein, cellulose acetate, nanofibrillated cellulose, peanut husks, agar, microalgae biomass, sugar beet pulp, distillers dried grains, oil palm empty fruit bunch fiber, corn gluten meal, and wheat‐straw lignocellulosic fillers, etc. In these green composites, the common problem to be addressed is the limited interfacial compatibility between natural fiber and PBAT polymer.…”

Section: Introductionmentioning

confidence: 99%

Properties of poly(butylene adipate‐co‐terephthalate) and sunflower head residue biocomposites

Liu

Tian

Liu

et al. 2016

Utilization of low-value agricultural waste for polymer composite materials has great environmental and economical benefits. Sunflower head residue (SHR) as an agricultural waste may be used as a reinforcement in polymeric materials because of its fiber characteristics. In this work, composites of biodegradable poly(butylene adipate-co-terephthalate) (PBAT) and SHR were prepared via melt-extrusion compounding. To improve interfacial compatibility, maleic anhydride (MA) grafted PBAT (PBAT-g-MA) was prepared and used as a compatibilizer for the PBAT/SHR composites. The effects of the concentrations of SHR and PBAT-g-MA on the morphology, mechanical properties, melt rheology, and water resistance of the composites were examined. Interfacial adhesion between phases in the PBAT/SHR composites was enhanced by the introduction PBAT-g-MA as interface-strengthening agent, resulting in improved mechanical properties and moisture resistance of the composite. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44644.