Table 6.

List of biocompatible and biodegradable materials used in wearable sensors as substrates and/or insulators.

SN	Material	Material Category	Chemical Structure	Young Modulus (MPa)/ Elongation (%)	Bio-compatible	Bio-degradable	Note
1.0	Cellulose Paper	Organic	-	17.6 ± 0.7/14.0 ± 0.4 [532]	Yes [533]	Yes [534]	Mechanical property values are based on cellulose paper made of steam-exploded bamboo microfibers. Mechanical property values are Tensile Strength and Elongation at the break. It can be used as an insulator [535] or substrate, [536] or all paper-based [537]
2.0	Ecoflex Silicone Elastomer 00-30	Organic	-	0.1/835 [538]	Yes [230,539]	-	Elongation value is at ƐMax. It can be used as an insulator [540] or substrate [541]
3.0	PCL	Organic	[C6H10O2]n	325±115/650± 350 [537]	Yes [542,543]	Yes [544]	Elongation value is at the break. It can be used as an insulator [545]
4.0	PDMS	Organic	[C2H6OSi]n	Hyperplastic [546]	Yes [547,548]	-	Usually used as a substrate [549,550] but can be used as an insulator [551].
5.0	PES	Organic	[C12H8O3S]n	3.76/47.66 [552]	Yes [553]	-	Elongation value is at the break. Bio-PES can be synthesized [554] It can be used as an insulator [555]
6.0	PET	Organic	[C10H8O4]n	19.59±0.22/1.87 ±0.03 [556]	Yes [557]	-	Mechanical properties are for Neat PET. Elongation value is at the break. They are usually used as a substrate. It can be used as an insulator [558,559] or substrate [560,561].
7.0	PI	Organic	C35H28N2O7	2010/27.5 [562]	Yes [563]	-	Mechanical properties are for Neat PI. Elongation value is at the break. They are usually used as a substrate. Bio-PI can be synthesized [564] It can be used as an insulator or substrate [565]
8.0	PLGA	Organic	C5H8O5	-	Yes [543,566]	Yes [566]	It can be used as an insulator [543]
9.0	PVA	Organic	[C2H4O]n	Hyperplastic [567]	Yes [568]	Yes [569]	It can be used as an insulator [570]
10.0	Silk	Organic	-	6100/19.55 [571]	Yes [572,573]	Yes [574]	Mechanical properties are based on B. Mori Silk. Elongation value is at the break. Silk properties can be tuned when blending with other materials [575] It can be used as an insulator [576] or substrate [577]
11.0	Shellac	Organic	-	Rheologic [578,579]	Yes [580]	Yes [581]	It can be used as an insulator [581] or substrate [582]
12.0	Sylgard Elastomer (184)	Organic	-	2.4/135 [538]	Yes [583]	-	Elongation value is at ƐMax. Elongation can be tuned when blending with other materials [584]