Paper · 2026 · LWT

Tannic acid-grafted Chitosan/Fe3+ composite coatings: Enhanced multifunctional properties and fruit preservation efficacy

Junyan Guo; Jiaqi Yan; Mohammad Rizwan Khan; et al.

4
claims
4
verbatim quotes
0
citations
2
research areas
✓
Open access · cc-by-nc-nd

Abstract

A chitosan (CS)-tannic acid (TA) composite film incorporating Fe 3+ was fabricated, with a controlled grafting ratio of 20% between CS and TA. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis confirmed the uniform distribution and favorable compatibility of TA/Fe 3+ within the CS matrix. The composite film demonstrated a 16.95% lower water vapor transmission rate than CS and exhibited inhibition zones of 41.67 ± 2.08 mm and 47.33 ± 4.16 mm against Escherichia coli and Staphylococcus aureus , respectively. Moreover, strawberries packaged with the CS/TA/Fe composite film exhibited an 89.52% reduction in decay index after 7 days of storage compared to the control. After 7 days of storage, the CS/TA/Fe film significantly reduced the total viable count (TVC) in strawberries by 32.9% compared to the control. Applied as a coating on mangoes inoculated with Colletotrichum gloeosporioides , the CS/TA/Fe film suppressed lesion diameter expansion by 72.58% relative to uncoated fruit. The corresponding TVC for mangoes coated with CS/TA/Fe was 6.58 ± 0.51 log CFU/g on day 7, also demonstrating the lowest microbial load among all treatment groups. These results indicate the promising potential of this composite as an active packaging or coating material for food preservation applications.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 4

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Strawberries packaged with the CS/TA/Fe composite film showed an 89.52% reduction in decay index after 7 days of storage compared to the control.

Taxon
strawberriesFragaria ×ananassae0
Treatment
CS/TA/Fe composite filme0
Outcome
decay indexe0
Direction
reductione0
Value
89.52%e0
Qualifier
after 7 days of storagee0
Comparator
the controle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“strawberries packaged with the CS/TA/Fe composite film exhibited an 89.52% reduction in decay index after 7 days of storage compared to the control”

✓ located verbatim in the source · abstract, characters 593–740 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

The CS/TA/Fe film significantly reduced the total viable count in strawberries by 32.9% compared to the control after 7 days of storage.

Taxon
strawberriesFragaria ×ananassae0
Treatment
CS/TA/Fe filme0
Outcome
total viable count (TVC)e0
Direction
reducede0
Value
32.9%e0
Qualifier
After 7 days of storagee0
Comparator
the controle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“After 7 days of storage, the CS/TA/Fe film significantly reduced the total viable count (TVC) in strawberries by 32.9% compared to the control”

✓ located verbatim in the source · abstract, characters 742–884 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A CS/TA/Fe coating on mangoes inoculated with Colletotrichum gloeosporioides suppressed lesion diameter expansion by 72.58% relative to uncoated fruit.

Taxon
mangoesMangifera indicae0
Treatment
coatinge0
Interactor
Colletotrichum gloeosporioidesColletotrichum gloeosporioidese0pathogen
Outcome
lesion diameter expansione0
Direction
suppressede0
Value
72.58%e0
Comparator
uncoated fruite0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Mangifera indica
Mangifera indica · TaxonBilljones94 · CC BY-SA 4.0 · Wikimedia Commons ↗
Colletotrichum gloeosporioides
Colletotrichum gloeosporioides · InteractorRGimilio · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Applied as a coating on mangoes inoculated with Colletotrichum gloeosporioides , the CS/TA/Fe film suppressed lesion diameter expansion by 72.58% relative to uncoated fruit”

✓ located verbatim in the source · abstract, characters 886–1058 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Mangoes coated with CS/TA/Fe had a total viable count of 6.58 ± 0.51 log CFU/g on day 7, the lowest microbial load among all treatment groups.

Taxon
mangoesMangifera indicae0
Treatment
CS/TA/Fee0
Outcome
TVCe0
Direction
loweste0
Value
6.58 ± 0.51 log CFU/ge0
Qualifier
on day 7e0
Comparator
all treatment groupse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Mangifera indica
Mangifera indica · TaxonBilljones94 · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The corresponding TVC for mangoes coated with CS/TA/Fe was 6.58 ± 0.51 log CFU/g on day 7, also demonstrating the lowest microbial load among all treatment groups”

✓ located verbatim in the source · abstract, characters 1060–1222 · show in text ↑

chitosan · disease · Fragaria x ananassa (strawberry)Results differ

43 papers: 42 positive, 1 negative or no effect

41 papers in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
  3. positive

39 papers more in this group

See all 43 papers →

tannic acid · disease · Fragaria x ananassa (strawberry)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

iron atom · disease · Fragaria x ananassa (strawberry)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

storage · Colletotrichum gloeosporioides · Mangifera indica (mango)Results agree

5 papers: 5 positive, 0 negative or no effect

4 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.