MARTINI coarse-grained model for crystalline cellulose microfibers.

Area of Science:

• Biophysics
• Materials Science
• Computational Chemistry

Background:

• Accurate modeling of cellulose structure at the mesoscale is essential for commercial biofuel production.
• Existing models struggle with cellulose's length scale and configurational complexity.
• Understanding cellulose dynamics is key to optimizing biofuel processes.

Purpose of the Study:

• To derive MARTINI coarse-grained force field parameters for simulating crystalline cellulose fibers.
• To develop a model capable of reproducing native cellulose Iβ properties.
• To provide a systematic method for modeling other crystalline biopolymers.

Main Methods:

• Development of MARTINI coarse-grained force field parameters.
• Simulation of crystalline cellulose fibers.
• Adaptation of models to reproduce physicochemical and mechanical properties.

Main Results:

• The derived MARTINI model accurately simulates crystalline cellulose fibers.
• The model reproduces key properties of native cellulose Iβ.
• It captures transitions to cellulose IIII and mechanical responses to temperature and bending.

Conclusions:

• A robust MARTINI model for solid cellulose crystalline fibers has been established.
• This model facilitates the study of cellulose dynamics and transformations.
• The systematic approach enables the creation of models for other crystalline biopolymers.