Crosslinked starch-coated cellulosic papers as alternative food-packaging materials

Fatima Zahra Semlali Aouragh Hassani, Mohamed Hamid Salim, Zineb Kassab, Houssine Sehaqui, El Houssaine Ablouh, Rachid Bouhfid, Abou El Kacem Qaiss, Mounir El Achaby

    Research output: Contribution to journalArticlepeer-review

    18 Scopus citations

    Abstract

    In general, during the papermaking process or the production of cellulosic materials for food-packaging applications, lignin and other amorphous components are usually removed via the pulping and multilevel bleaching process to entirely separate them from the fiber. The aim of this work was to study the positive effect that can impart the residual lignin remaining in the alkali-treated fiber surface over bleached fibers to produce an alternative food-packaging cellulosic paper. Herein, cellulosic papers based on alkali-treated and bleached fibers obtained from the Alfa plant were successfully prepared using a compression process. The as-obtained papers were coated by crosslinked starch using a solvent-casting method to improve their mechanical and surface properties. The morphological and contact angle results showed that the residual lignin in the alkali-treated cellulosic papers strongly increased the interfacial adhesion by making the structure denser and more compact, resulting in an improved water resistance property over the bleached ones. On the other hand, it also promoted char formation, slowing down the burning process, resulting in better flame resistance. Additionally, the mechanical properties demonstrated that the presence of lignin contributed to the material rigidity improvement without compromising its flexibility (folding endurance). The as-developed cellulosic papers coated with crosslinked starch could be used for the production of high-quality materials for food-packaging applications using conventional industrial processes.

    Original languageBritish English
    Pages (from-to)8536-8546
    Number of pages11
    JournalRSC Advances
    Volume12
    Issue number14
    DOIs
    StatePublished - 17 Mar 2022

    Fingerprint

    Dive into the research topics of 'Crosslinked starch-coated cellulosic papers as alternative food-packaging materials'. Together they form a unique fingerprint.

    Cite this