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Area of Science:

  • Materials Science
  • Sustainable Chemistry
  • Biotechnology

Background:

  • Recycled waste pulp is a sustainable alternative to petroleum-based polymers.
  • Repeated reuse degrades fiber structure, reducing paper performance metrics like tensile strength.
  • There is a need for methods to enhance the properties of recycled waste pulp.

Purpose of the Study:

  • To develop a sustainable and energy-efficient strategy for fabricating tailored hemp pulp.
  • To incorporate customized hemp pulp into recycled waste pulp to improve papermaking properties.
  • To evaluate the enhancement in mechanical properties of the modified recycled waste pulp.

Main Methods:

  • Hemp material pretreatment using enzymatic conditions to remove lignin and pectin.
  • Kraft pulping of hemp under atmospheric pressure.
  • Incorporation of customized hemp pulp into recycled waste pulp at varying percentages.

Main Results:

  • The 20% hemp pulp sample (H20MP) showed significant improvements in mechanical properties compared to the control (H0MP).
  • Key improvements include a tensile index of 43.00 N·m/g, tear index of 6.03 N·m²/g, burst index of 1.19 kPa·m²/g, and folding endurance of 33 cycles.
  • The enhanced recycled pulp exceeded the performance of commercial containerboard.

Conclusions:

  • This study presents a novel approach for high-value utilization of hemp fibers.
  • The developed method provides an effective solution for improving the papermaking performance of recycled waste pulp.
  • The findings support the use of enhanced recycled pulp as a sustainable alternative in packaging.