No abstract

In this study, guar gum fibers were obtained by wet spinning, in which epichlorohydrin (ECH) and calcium chloride (CaCl 2 ) were used as the cross-linking agent and metal complexing agent, respectively. The fibers' chemical structure, morphology, crystallinity, and thermal and mechanical properties were analyzed by Fourier infrared spectroscopy, scanning electron microscopy, and so forth. The results showed that ECH reacted with guar gum and formed ether bonds. Meanwhile, ECH can effectively increase the number of cross-linking points and improve the mechanical properties of the fibers. When the ECH content was 12% (w/w), the breaking strength could reach 2.4 cN/dtex. The conductivity of MC-GG fibers varied with the relative humidity and could reach 2.845 × 10 −2 S/cm at maximum. Meanwhile, the contact angle of MC-GG fibers was 33°, indicating that the fibers had good hydrophilicity and humidity response ability and had excellent potential in the field of smart fabrics.

In this study, sodium alginate (SA)/Antarctic krill protein(AKP)/Genipin (GP) scaffold was obtained by freeze-drying, in which Antarctic krill protein was used as enhanced the cell adsorption activity of the materials; GP and Ca2+, which have very low cytotoxicity, were selected to cross-link AKP and SA in steps, the interpenetrating network structure of “covalent cross-linking-ion complex-hydrogen bonding” was finally constructed. By changing the content of GP, the structure, surface morphology, mechanical properties, water absorption, water retention, and cytotoxicity of the scaffold were studied using FTIR, SEM, and other test methods. The results showed that the pore area of the prepared SA/AKP/GP scaffolds exhibited an increase and then a decrease with the increase of GP content; the fracture strength and elongation at break exhibited an increase and then a decrease with the increase of GP content. The breaking strength and elongation at break achieved their maximum values of 32.9 MPa and 4.43% when the content of GP hit 0.8%; The scaffold had good water absorption and water retention; The cytotoxicity grade of the scaffold was grade 0, and the addition of AKP made the fibroblasts have good growth and proliferation ability on the scaffold.