[T1] Powder Production

[14C-T1-02] Sustainable Synthesis of MOF-Biopolymer Macrostructures: Preparation of Cu-BDC Patterned Carboxymethyl Cellulose-Cu Aniline Beads

*P. K. Kimani¹, L. W. Lim¹, E. S. Madivoli², E. G. Maina³, C. Takai-Yamashita^{1, 4} (1.Gifu University, Japan, 2.Jomo Kenyatta University of Agriculture and Technology, Kenya, 3.University of Siegen, Germany, 4.Tohoku University, Japan)

キーワード：Biopolymer, Carboxymethyl Cellulose, Metal Organic Frameworks, Macroscopic Architectures

Presented here is a sustainable and scalable method for the in-situ growth of benzene-1,3-dicarboxylate (Cu-BDC) metal organic framework (MOF) on carboxymethyl cellulose (CMC) beads, addressing the challenges of MOFs' nano-size in practical applications. Utilising a 2% w/v CMC solution with aniline, a suspension of 1,4-benzenedicarboxylic acid (H₂BDC) was introduced into nitrate and acetate aqueous copper solutions. Effects of aniline concentration, temperature, and time were investigated using a full-factorial experimental design. The resulting acetate-prepared beads (1.32±0.12 mm) exhibited sheet-like folds patterned with 483.78±7.29 nm rice-like Cu-BDC crystals, while the nitrate-prepared beads (1.87±0.16 mm) featured gyrification-like folds with 488.78±1.19 nm sized Cu-BDC spherical protrusions. Increasing temperature and aniline concentration enhanced Cu-BDC crystallinity but reduced bead size. Equivalent moles of aniline to terephthalic acid were crucial in forming the surface folds: their simultaneous oxidation facilitated a repetitive layer-by-layer deposition. This innovative approach offers a sustainable solution to the practical application challenges of MOFs.