Digital sonifier model 250

Example 11

As another example, 48 mL of the SWCNT-containing suspension from 60 mg of single-walled carbon nanotubes (SWCNT) obtained from OCSiAI (Palo Alto, Calif.) was added to 60 mL of Vorex resin (MadeSolid) to obtain a final SWCNT concentration of about 0.1% w/v and the suspension was power sonicated for 5 minutes with a Branson (Danbury, Conn.) Digital Sonifier model 250 fitted with a model 1020 probe. This sonicated resin mixture was placed in the build vat of a commercial stereolithographic printer (Form 1 from Form Labs, Boston, Mass.) and used to produce a 1 mm thick×10 mm wide by 50 mm long strip in which the nanotubes appeared to be very uniformly distributed, with no CNT agglomeration visible. The highly-flexible finished test strip was washed with isopropanol and then cured in sunlight for one hour. The conductivity of the test strip was then measured using a four-probe multimeter (R-Chek, EDTM Inc.) to obtain the electrical resistance. This test strip exhibited an electrical resistance of about one megaohm over the entire sample length.

Example 12

As another example, 60 mg of single-walled carbon nanotubes (SWCNT) obtained from OCSiAI (Palo Alto, Calif.) was added directly to 50 mL of Vorex resin (MadeSolid) to obtain a final SWCNT concentration of about 0.12% Vorex and the suspension was power sonicated for 3 minutes with a Branson (Danbury, Conn.) Digital Sonifier model 250 fitted with a model 102C probe. This sonicated resin mixture was placed in the build vat of a commercial stereolithographic printer (Form 1 from FormLabs, Boston, Mass.) and used to produce a 1 mm thick×10 mm wide by 100 mm long strip in which the nanotubes appeared to be very uniformly distributed, with no CNT agglomeration visible. The highly-flexible finished test strip was washed with isopropanol and then cured in sunlight for one hour. The conductivity of the test strip was then measured using a using a four-probe multimeter (R-Chek, EDTM Inc.) to obtain the electrical resistance. This test strip exhibited an initial electrical resistance of about 400-600 kΩ over the entire 10-cm sample length, which fell to 200-300 kΩ over the entire 10-cm sample length after sitting overnight.

Example 10

As another example, 60 mg of single-walled carbon nanotubes (SWCNT) obtained from OCSiAI (Palo Alto, Calif.) was added to 60 mL of Vorex resin (MadeSolid) to obtain a final SWCNT concentration of about 0.1% w/v and the suspension was power sonicated for 5 minutes with a Branson (Danbury, Conn.) Digital Sonifier model 250 fitted with a model 102C probe. This sonicated resin mixture was placed in the build vat of a commercial stereolithographic printer (Form 1 from FormLabs, Boston, Mass.) and used to produce a 1 mm thick×10 mm wide by 50 mm long strip in which the nanotubes appeared to be very uniformly distributed, with no CNT agglomeration visible. The highly-flexible finished test strip was washed with IPA and then cured in sunlight for one hour. The conductivity of the test strip was then measured using a multimeter to obtain the electrical resistance. This highly agglomerated test strip exhibited an electrical resistance of about one megaohm over the entire sample length.

EXAMPLE 12

As another example, 60 mg of single-walled carbon nanotubes (SWCNT) obtained from OCSiAl (Palo Alto, Calif.) was added directly to 50 mL of Vorex resin (MadeSolid) to obtain a final SWCNT concentration of about 0.12% w/v and the suspension was power sonicated for 3 minutes with a Branson (Danbury, Conn.) Digital Sonifier model 250 fitted with a model 102C probe. This sonicated resin mixture was placed in the build vat of a commercial stereolithographic printer (Form1 from FormLabs, Boston, Mass.) and used to produce a 1 mm thick×10 mm wide by 100 mm long strip in which the nanotubes appeared to be very uniformly distributed, with no CNT agglomeration visible. The highly-flexible finished test strip was washed with isopropanol and then cured in sunlight for one hour. The conductivity of the test strip was then measured using a using a four-probe multimeter (R-Chek, EDTM Inc.) to obtain the electrical resistance. This test strip exhibited an initial electrical resistance of about 400-600 kΩ over the entire 10-cm sample length, which fell to 200-300 kΩ over the entire 10-cm sample length after sitting overnight.

EXAMPLE 11

As another example, 48 mL of the SWCNT-containing suspension from 60 mg of single-walled carbon nanotubes (SWCNT) obtained from OCSiAl (Palo Alto, Calif.) was added to 60 mL of Vorex resin (MadeSolid) to obtain a final SWCNT concentration of about 0.1% w/v and the suspension was power sonicated for 5 minutes with a Branson (Danbury, Conn.) Digital Sonifier model 250 fitted with a model 102C probe. This sonicated resin mixture was placed in the build vat of a commercial stereolithographic printer (Form1 from Form Labs, Boston, Mass.) and used to produce a 1 mm thick×10 mm wide by 50 mm long strip in which the nanotubes appeared to be very uniformly distributed, with no CNT agglomeration visible. The highly-flexible finished test strip was washed with isopropanol and then cured in sunlight for one hour. The conductivity of the test strip was then measured using a four-probe multimeter (R-Chek, EDTM Inc.) to obtain the electrical resistance. This test strip exhibited an electrical resistance of about one megaohm over the entire sample length.