Dataset of some added-lignin thermoformed pulps

Area of Science:

• Materials Science
• Polymer Science
• Sustainable Materials

Background:

• Molded pulp products offer a sustainable alternative to plastics.
• Lignin, a byproduct of pulping, can impart water-resistant properties to cellulosic materials.
• Added-lignin thermoformed pulps (ALTPs) are explored for applications requiring moisture resistance.

Purpose of the Study:

• To summarize the material properties of added-lignin thermoformed pulps (ALTPs).
• To investigate the effect of lignin addition on water absorption and mechanical properties of molded pulps.
• To compare the performance of different lignin types (soda, Kraft, acetylated) in ALTPs.

Main Methods:

• Pulp substrates (CTMP and NBSK) were combined with added lignin (13.33% loading).
• Sheets were formed, pressed, air-dried, and thermopressed at 175°C and 200 bar.
• Material density, water uptake (24h immersion), and tensile properties were measured.

Main Results:

• Lignin addition resulted in slight density increases and reduced water absorption.
• Acetylated lignin significantly decreased water uptake compared to soda or Kraft lignin.
• Tensile strength and stiffness changes varied: CTMP showed no improvement, while NBSK exhibited increased strength and stiffness.

Conclusions:

• ALTPs demonstrate potential for moisture-resistant applications.
• Acetylated lignin is particularly effective in reducing water absorption in these materials.
• The choice of base pulp (CTMP vs. NBSK) influences the mechanical property response to lignin addition.