Enhanced Self-Assembly and Mechanical Properties of Cellulose-Based Triblock Copolymers: Comparisons with Amylose-Based Triblock Copolymers
نویسندگان
چکیده
Herein, we compared the microphase-separation behavior and mechanical properties of cellulose- amylose-based block copolymers (BCPs). Various cellooligosaccharide triacetate-b-poly(?-decanolactone)-b-cellooligosaccharide triacetates (AcCeln-b-PDL-b-AcCelns), which are cellulose-based ABA-type BCPs, with PDL molecular weights approximately 5, 10, 20 kg mol–1 volume fractions 0.65, 0.77, 0.87, were synthesized from ?,?-diazido-end-functionalized PDLs propargyl-end-functionalized via click chemistry. We adopted cellodextrin-phosphorylase-mediated oligomerization ?-d-glucose-1-phosphase in presence a cellobiose primer to synthesize functional segment. The maltooligosaccharide triacetate-b-poly(?-decanolactone)-b-maltooligosaccharide triacetate (AcMaln-b-PDL-b-AcMalns) amylose counterparts also similar manner. Small-angle X-ray scattering experiments atomic force microscopy revealed that AcCeln-b-PDL-b-AcCelns more likely microphase-separate into ordered nanostructures AcMaln-b-PDL-b-AcMalns, despite their comparable chemical compositions weights. Furthermore, exhibited significantly superior performance under tensile testing, Young’s modulus stress at break AcCeln-b-PDL10k-b-AcCeln being 2.3 1.8 times higher, respectively, than those AcMaln-b-PDL10k-b-AcMaln. enhanced found be attributable stiffness crystalline nature AcCeln segments. These results demonstrate advantages using cellulose derivatives novel biofunctional materials.
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ژورنال
عنوان ژورنال: ACS Sustainable Chemistry & Engineering
سال: 2021
ISSN: ['2168-0485']
DOI: https://doi.org/10.1021/acssuschemeng.1c02180