*Co esponding au ho : Mana Shi en Polepalli.
Copy igh © 2025 Au ho (s) e ain he copy igh o his a icle. This a icle is published unde he e ms o he C ea i e Commons A ibu ion Liscense 4.0.
A mini- e iew on he mechanical p ope ies o spide silk and i s po en ial u u e
applica ions
Mana Shi en Polepalli 1, * and Adi ya Shukla 2
1 G ade 12, Delhi Public School (Sou h), Bangalo e, Ka na aka, India.
2 Depa men o Mic obiology, Uni e si y o Calcu a, Kolka a, India.
Wo ld Jou nal o Biology Pha macy and Heal h Sciences, 2025, 24(01), 076-079
Publica ion his o y: Recei ed on 27 Augus 2025; e ised on 01 Oc obe 2025; accep ed on 04 Oc obe 2025
A icle DOI: h ps://doi.o g/10.30574/wjbphs.2025.24.1.0877
Abs ac
Spide silk is enowned o i s excep ional mechanical p ope ies, including high ensile s eng h, elas ici y, oughness,
and biodeg adabili y, su passing many con en ional syn he ic ibe s. These cha ac e is ics make i a p omising
candida e o sus ainable applica ions ac oss di e se sec o s such as biomedicine, ex iles, enginee ing, and
a chi ec u e. Howe e , la ge-scale ha es ing om spide s is imp ac ical due o hei soli a y and cannibalis ic na u e.
Recen ad ances in bioenginee ing—including gene ically modi ying silkwo ms and mic oo ganisms, and using
mic o luidic spinning—now allow he p oduc ion o a i icial spide silk wi h p ope ies closely esembling i s na u al
coun e pa . This pape explo es he undamen al mechanical a ibu es o spide silk, cu en a i icial p oduc ion
echniques, scalabili y challenges, and po en ial u u e indus ial applica ions. While high p oduc ion cos s emain a key
limi a ion, con inued de elopmen s in syn he ic biology may enable spide silk o eme ge as a sus ainable nex -
gene a ion ma e ial.
Keywo ds: Spide silk; Mechanical p ope ies; A i icial silk p oduc ion; Gene ically modi ied o ganisms; Mic o luidic
spinning; Indus ial applica ions
1. In oduc ion
Spide silk has ga ne ed a en ion wo ldwide due o i s ou s anding mechanical p ope ies. E o s o eplica e i s
s uc u e and p ope ies a i icially include he use o mic o luidic spinning (Chen e al., 2024) and gene ic modi ica ion
o silkwo ms (Xu e al., 2018).
Spide silk is a p o ein-based polyme , ini ially sec e ed as a liquid by specialized glands in a spide ’s abdomen.
Spinne e s on he spide ’s abdomen ex ude he p o ein luid h ough spigo s, solidi ying in o silk h eads (Singha e al.,
2012).
The mechanical supe io i y o spide silk—such as high ensile s eng h, elas ici y (Bonino e al., 2003), oughness, and
biodeg adabili y—o e s signi ican ad an ages o e con en ional syn he ic ibe s. These a ibu es make a i icial
spide silk a p omising, sus ainable al e na i e o ma e ials like Ke la and s eel.
This pape e iews he key mechanical p ope ies o spide silk, cu en p oduc ion echniques, scaling ba ie s, a
compa ison wi h indus ial ma e ials like s eel, and i s po en ial o u u e a chi ec u al and indus ial applica ions.
Wo ld Jou nal o Biology Pha macy and Heal h Sciences, 2025, 24(01), 076-079
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2. Mechanical P ope ies o Spide Silk
2.1. Tensile S eng h
Tensile s eng h e e s o a ma e ial’s esis ance o b eaking unde ension. Acco ding o Bonino (2003), spide silk
exhibi s a ensile s eng h o app oxima ely 1.2 ± 0.22 GPa, making i a s ong con ende o eplace adi ional ma e ials
such as s eel in applica ions demanding high ensile s eng h.
2.2. Elas ici y
Elas ici y is he abili y o a ma e ial o e u n o i s o iginal shape a e de o ma ion. Some spide silk ypes can s e ch
up o i e imes hei o iginal leng h. Elas ic modulus alues a y widely among species, anging om 0.012 o 13.8 GPa
(Osaki e al., 2002).
The able below exp esses he expe imen al alues o s ess, s ain, and hei a ios, which a e hen used o calcula e
he elas ici y and ensile s eng h o spide silk.
Table 1 Expe imen ally ob ained alues o he elas ici y and ensile s eng h o spide silk
Ma e ial P ope y
Expe imen al Value
Maximum S ain (%)
24.1±2
Young’s Modulus, Ei (GPa)
2.2±0.7
Final Modulus, E (GPa)
0.4±0.1
Tensile S eng h (GPa)
1.2±0.2
Ene gy o B eak (105 J/Kg)
1.4±0.3
(Sou ce: Bonino, 2003)
2.3. Toughness
Toughness is he abili y o a ma e ial o abso b ene gy and de o m plas ically wi hou ac u ing. Spide silk’s
combina ion o s eng h and ex ensibili y enables i o abso b signi ican ly mo e ene gy han ma e ials like Ke la and
nylon (Röme & Scheibel, 2008).
2.4. Biodeg adabili y
Being p o ein-based, spide silk is biodeg adable and can be b oken down na u ally by mic oo ganisms. This eco-
iendly ai gi es i a sus ainabili y edge o e pe oleum-based syn he ic ibe s.
3. Po en ial Applica ions o Spide Silk
3.1. A chi ec u e
Spide silk, due o i s high ensile s eng h and elas ici y, may se e as a po en ial al e na i e o s eel in suspension
cables, suppo beams, and lexible a chi ec u al amewo ks. While s ill specula i e, i holds p omise o ligh e and
mo e en i onmen ally iendly cons uc ion ma e ials.
3.2. Machine y
Spide silk’s ensile s eng h could make i sui able o load-bea ing cables in machines such as ele a o s and c anes. I s
supe io load- o-weigh a io could enable ligh e , mo e e icien machine y componen s.
3.3. Tex iles
Due o i s oughness and biodeg adabili y, spide silk can se e as an eco- iendly al e na i e o ma e ials like Ke la . I
also has po en ial applica ions in ashion, spo swea , and e en ballis ic p o ec ion.
Wo ld Jou nal o Biology Pha macy and Heal h Sciences, 2025, 24(01), 076-079
78
4. P oduc ion Techniques
4.1. Na u al Silk Fo ma ion
Spide s syn hesize silk as a liquid p o ein, which solidi ies upon ex usion om spinne e s. Howe e , he na u al yield
is oo low o comme cial use, and spide s’ soli a y beha io p e en s la ge-scale a ming.
4.2. Mic o luidic Spinning
Resea che s ha e mimicked spide silk o ma ion using mic o luidic we -spinning (Peng e al., 2016). Despi e
success ully mimicking s uc u al alignmen , a i icial ibe s only eached a ensile s eng h o 510 MPa and an
elonga ion o 15%, a below na u al silk (Bonino, 2003).
4.3. Gene ic Enginee ing
Xu e al. (2018) demons a ed ha gene ically modi ied Bombyx mo i silkwo ms can p oduce silk mimicking spide silk
p ope ies. This p esen s a scalable al e na i e, compa ible wi h exis ing silk indus y in as uc u e.
5. Limi a ions
The p ima y ba ie o widesp ead adop ion o spide silk is i s high p oduc ion cos . While s eel cos s abou $802 pe
me ic on (FocusEconomics, 2025), syn he ic silk ia e men a ion cos s app oxima ely $100/kg (~$100,000/ on)
(Tullo, 2021).
Al hough companies like Spibe a e pionee ing comme cial-scale p oduc ion using B ewed P o ein, spide silk is no
ye cos -compe i i e wi h me als o syn he ic ibe s. Addi ionally, mechanical consis ency and p ocess op imiza ion
emain echnical hu dles.
5.1. Fu u e P ospec s
Fu u e comme cial iabili y depends on educing cos s and imp o ing yield. Gene ic enginee ing o silkwo ms and
mic obial e men a ion using yeas o bac e ia hold he mos p omise.
Op imizing spinning echniques and e men a ion sys ems may allow mass p oduc ion a a cos compa able o
adi ional ibe s. Wi h u he de elopmen , spide silk could e olu ionize indus ies om cons uc ion o medical
de ices.
6. Conclusion
Spide silk boas s ou s anding mechanical p ope ies—s eng h, elas ici y, oughness, and biodeg adabili y. A i icial
p oduc ion me hods, pa icula ly gene ic enginee ing and e men a ion, show p omise. Al hough comme cial use is
cu en ly limi ed by high cos s, u u e ad ances in syn he ic biology and ma e ials science could make spide silk a
iable, sus ainable al e na i e o con en ional ma e ials.
Compliance wi h e hical s anda ds
Disclosu e o con lic o in e es
No con lic o in e es o be disclosed.
Re e ences
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h ps://www.lle. oches e .edu/media/publica ions/documen s/ heses/Bonino.pd
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Numa a, K. (2024). Replica ing shea -media ed sel -assembly o spide silk h ough mic o luidics. Na u e
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