Details

Autor(en) / Beteiligte

• Vera, Myleidi
• Bischof, Sabrina
• Rivas, Bernabé L.
• Weber, Hedda
• Kai Mahler, Arnulf
• Kozich, Martin
• Guebitz, Georg M.
• Nyanhongo, Gibson S.

Titel

Biosynthesis of highly flexible lignosulfonate–starch based materials

Ist Teil von

• European polymer journal, 2023-10, Vol.198, p.112392, Article 112392

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •A green method for films composed of starch and lignosulfonates is reported.•Enzymatic polymerization of lignosulfonates was used to obtain biofilms.•The polymerization was monitored by changes in Mw, viscosity, and fluorescence.•The effect of starch concentration on polymer properties was studied.•Thermal, mechanical, and swelling properties were evaluated. The need to replace polymers from fossil sources with bio-based renewable sources is increasingly imminent. This work reports on the synthesis of biofilms obtained from the polymerization of lignosulfonates using laccase as a biocatalyst and blending with starch. The effect of the reaction conditions on the formation of stable starch-lignosulfonate polymers was evaluated by monitoring changes in viscosity, molecular weight (Mw), and fluorescence measurements. Enzymatic polymerization led to molecular weights of ∼ 400 kDa and viscosities of ∼ 1.00 Pas and decreases in lignosulfonates-OH groups by about 46% after 1 h of reaction carried out at pH 7 and adding starch at the end of the polymerization reaction. Additionally, the effect of the starch concentration on the mechanical, thermal, and water absorption properties was studied. As a result, the addition of up to 7% starch was found to improve the mechanical properties of the lignosulfonate films as indicated by the increase in elongation at break, tensile strength, and Young's modulus, reaching values of 157%, 1.19 MPa, and 0.22 MPa, respectively. This study demonstrated a green alternative for creating 100% biobased films composed of starch and lignosulfonates.