Table 2 Moisture content moisture content in PLA and coated samples at 80% RH, from measurements (MC) and from calculations (EMC), with the thickness and mass in percentage of PLA and the coatings.

From: Water vapor transport properties of bio-based multilayer materials determined by original and complementary methods

 

Thickness

Mass (%)

Moisture content (gwater/100 g dry matter)

Sample

PLA (µm)

CS/NC layer (nm)

PLA

CS/NC layer

Expected MC (sample)

MC (sample)

PLA (1)

50 ± 2

–

100

–

–

0.673

PLA (2)

50 ± 2

–

100

–

–

0.620

PLA(CS)

50 ± 2

40

99.98

0.02

0.691

0.759

PLA(CS)(CNC)2

50 ± 2

120

99.76

0.24

0.712

0.732

PLA(CS)(CNC)10

50 ± 2

440

99.13

0.87

0.797

0.759

PLA(CS)(CNF)2

50 ± 2

44

99.91

0.09

0.692

0.744

PLA(CS)(CNF)10

50 ± 2

60

99.88

0.12

0.697

0.763

PLA(CS)(CNF TEMPO)2 (1)

50 ± 2

48

99.90

0.10

0.695

0.747

PLA(CS)(CNF TEMPO)2 (2)

50 ± 2

48

99.90

0.10

0.695

0.771

PLA(CS)(CNF TEMPO)10 (1)

50 ± 2

80

99.84

0.16

0.710

0.697

PLA(CS)(CNF TEMPO)10 (2)

50 ± 2

80

99.84

0.16

0.710

0.716

  1. Experimental variability: 10%
  2. EMC(sample) : Expected equilibrium moisture content in the sample, MC(sample): Moisture content in the sample.
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