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- 저자 : Amaia Morales (검색결과 1 건)
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Assessment of green approaches for the synthesis of physically crosslinked lignin hydrogels
Amaia Morales,Jalel Labidi,Patricia Gullón 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.81 No.-
Lignin is an excellent candidate to be used as a starting material for hydrogel synthesis due to its highlyfunctional character. The exhaustible character of the fossil resources linked to the increase of plasticresidues in the environment encourages an intensive research on biorenewable and biodegradablepolymers to synthesize new materials. Taking into account this current scenario, this work searches fornew green routes to elaborate physical hydrogels with excellent capacity of swelling and suitableconsistency. To this end, lignin and poly(vinyl alcohol) were blended in different proportions following athree-level-two-factorial design and using six different routes of crosslinking and drying for each set ofexperiments. The hydrogels formed under the optimal conditions were characterized by FTIR, SEM, XRD,DSC and TGA and their mechanical properties were also evaluated by compression tests. The selectedoptimum synthesis routes enabled the obtaining of physically crosslinked hydrogels with up to 800%water retention ability. FTIR spectra confirmed the interactions between lignin and PVA showing shiftsand modifications on the characteristic bands of the raw polymers. Compression tests showed that all thehydrogels kept complete integrity even compressing them up to an 80% of their initial thickness.
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