Biodegradable Films and Starch Compositions with Other Materials

Abstract

Due to growing concern about the environment, the use of biodegradable polymeric materials has been studied in order to minimize the environmental impact caused by synthetic polymers. Among these materials can be detached polymeric films containing corn starch, with low cost and available worldwide. This paper exhibits some characteristics of the starch and summarizes studies in which the authors present some properties of polymeric materials containing starch, especially mechanical and barrier properties, permeability to water vapor and the use of plasticizers.Keywords: Starch; film; biodegradable polymer; properties. ResumoDevido à crescente preocupação com o meio ambiente, a utilização de materiais poliméricos biodegradáveis vem sendo estudada, a fim de minimizar os impactos causados por polímeros sintéticos. Dentre estes materiais podem ser destacados os filmes poliméricos contendo amido de milho, que possuem baixo custo e estão disponíveis em todo mundo. Este artigo exibe algumas características do amido e resume trabalhos nos quais os autores expõem algumas propriedades de materiais poliméricos contendo amido, principalmente, propriedades mecânicas, de barreira, permeabilidade ao vapor de água e a utilização de plastificantes.

Influence of alkaline treatment on sisal fibre applied as reinforcement agent in composites of corn starch and cellulose acetate matrices

“…Starch structure is mainly composed of straight chains of amylose and branched chains of amylopectin [10,11]. Among the applications of starch are films for packaging products of various types, such as bottles for cosmetics, packaging for fertilisers in granules or powder, packaging used in agriculture for planting seedlings, edible packaging for food products [12][13][14][15]. Another polymer of great interest for preparing composites is cellulose acetate.…”

Effect of Starch Laurate Addition on the Properties of Mango Kernel Starch Films

“…Acylation of mango kernel starch (MKS) with different amounts of vinyl laurate (VL) was performed under basic catalysis, according to described in literature [19][20][21][22][23][24] , but with some modifications. In this case, the objective was to evaluate the effects of different degrees of substitution on the final properties of the starch derivatives and their films.…”

“…Although starch films have advantages related to renewal and biodegradation, they have limitations on their mechanical and barrier properties, forming brittle and hygroscopic materials [20][21][22][23] . Therefore, the incorporation of additives capable of improving these properties have been investigated 22,[24][25][26][27][28] . For instance, formulations based on starch/lipid blends have been studied extensively, generating improvements on the mechanical and barrier properties of films 24,29 .…”

Study of Kinetics, Thermodynamics and Reaction Time of Corn Starch Acetylation

“…This makes starch very prone to chemical attacks, essential for chemical modification. Thus, functional groups (hydroxyl -OH) may undergo substitution reactions and C-O-C bonds, which are nucleophilic, are susceptible to chain rupture [2].…”