Citric acid modified potato starch films containing microcrystalline cellulose reinforcement - properties and application

Abstract

The preparation method of starch‐based films cross‐linked with citric acid (CA) and containing microcrystalline cellulose (MCC) has been described. The addition of MCC improved mechanical properties of polysaccharide films. Young's modulus and tensile strength increased from 42 to 96 MPa and from 2.6 to 3.9 MPa, respectively, for unfilled starch/CA films and similar system containing 15 wt% MCC, respectively. Moreover, the presence of cellulose filler influenced the thermal properties of starch‐based material: with increasing MCC content glass transition (tan δ) increased from 108 up to 129°C, respectively, for unfilled system and containing 15 wt% MCC. Additionally, the hydrophilicity of starch‐based films was reduced, as moisture absorption and solubility in water decreased. Novel application of reinforced biodegradable starch‐based films as pressure sensitive adhesive carrier (for double‐sided tapes used in paper industry) was successfully proposed.

Aging of silicone pressure-sensitive adhesives

“…The data were reported as the average of the range of numbers observed during the test. The given result was an arithmetic average of three specimens [3].…”

“…They are a class of adhesive material that adheres to a substrate under light pressure and can be removed cleanly, on demand, without leaving residues on the substrate. From mechanically point of view, a pressure-sensitive adhesive is a soft, sticky substance [1][2][3].…”

Water-Soluble Pressure-Sensitive Adhesives Containing Carboxymethyl Starch with Improved Adhesion to Paper

“…There are some reports on using starchbased films as carriers for double-sided pressure-sensitive tapes for paper industry [7,8]. There are known adhesives based on starch [9][10][11][12].…”

Impact of additives on mechanical and barrier properties of starch‐based films plasticized with deep eutectic solvents

“…Maximum tensile strength with MC (13.6 MPa) is much higher than the sample without any filler (9.9 MPa). In contrast, for TPS films plasticized with glycerol in presence of 12 pph citric acid, introduction of 5% MC only increased TS from 2.6 MPa (reference sample) to near 3 MPa . Tannin also has terminal hydroxyl groups so choline citrate can react both with tannin and with starch resulting in the highest TS 14.5 MPa compared to the other films (Table ).…”