Responsive behavior of regenerated cellulose in hydrolysis under microwave radiation.

Bioresource technology · 2014 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 6559

Study snapshot

PublicationBioresource technology · 2014

Study typeother

Reported directionUnclear

Evidence ratingInsufficient

Abstract

This work studied the responsive behavior of regenerated cellulose (RC) in hydrolysis under microwave radiation. Four types of RC with different crystallinity (Cr) and degree of polymerization (DP) are produced to evaluate the reactivity of RC by step-by-step hydrolysis. Results show Cr is the key factor to affect the reactivity of RCs. With hydrolysis of amorphous region and the formation of recrystallization, the Cr of RC reaches a high value and thus weakens the reactivity. As a result, the increment of cellulose conversion and sugar yield gradually reduces. Decrease of the DP of RC is helpful to increase the speed at the onset of hydrolysis and produce high sugar yield. But, there is no direct influence with the reactivity of RC to prolong the time of pretreatment. This research provides an accurate understanding to guide the RC preparation for sugar formation with relative high efficiency under mild reaction conditions.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 66% · Peer reviewed: yes

Main findings

In step-by-step hydrolysis of regenerated cellulose under microwave radiation, crystallinity (Cr) was reported as a key factor affecting reactivity; increasing Cr during hydrolysis (via amorphous-region hydrolysis and recrystallization) weakened reactivity and reduced incremental gains in conversion and sugar yield. Lower degree of polymerization (DP) increased the initial hydrolysis speed and enabled higher sugar yield, while prolonging pretreatment time was reported to have no direct influence on reactivity.

Outcomes measured

cellulose hydrolysis reactivity
cellulose conversion
sugar yield
crystallinity (Cr) changes
degree of polymerization (DP) effects

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": "microwave radiation",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "cellulose hydrolysis reactivity",
    "cellulose conversion",
    "sugar yield",
    "crystallinity (Cr) changes",
    "degree of polymerization (DP) effects"
  ],
  "main_findings": "In step-by-step hydrolysis of regenerated cellulose under microwave radiation, crystallinity (Cr) was reported as a key factor affecting reactivity; increasing Cr during hydrolysis (via amorphous-region hydrolysis and recrystallization) weakened reactivity and reduced incremental gains in conversion and sugar yield. Lower degree of polymerization (DP) increased the initial hydrolysis speed and enabled higher sugar yield, while prolonging pretreatment time was reported to have no direct influence on reactivity.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.66,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "microwave radiation",
    "regenerated cellulose",
    "hydrolysis",
    "crystallinity",
    "degree of polymerization",
    "cellulose conversion",
    "sugar yield",
    "recrystallization"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1016/j.biortech.2014.05.066
PubMed: 24971946

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