LDPE Transformation by Exposure to Sequential Low-Pressure Plasma and TiO 2 /UV Photocatalysis
Low-density polyethylene (LDPE) sheets (3.0 ± 0.1 cm) received sequential treatment, first by the action of direct-current low-pressure plasma (DC-LPP) with a 100% oxygen partial pressure, 3.0 × 10 mbar pressure, 600 V DC tension, 5.6 cm distance, 6-min treatment. Then, sheets were submitted to TiO...
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Published in | Molecules (Basel, Switzerland) Vol. 26; no. 9 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
26.04.2021
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Subjects | |
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Abstract | Low-density polyethylene (LDPE) sheets (3.0 ± 0.1 cm) received sequential treatment, first by the action of direct-current low-pressure plasma (DC-LPP) with a 100% oxygen partial pressure, 3.0 × 10
mbar pressure, 600 V DC tension, 5.6 cm distance, 6-min treatment. Then, sheets were submitted to TiO
photocatalysis at UV radiation at 254 nm (TiO
/UV) with a pH value of 4.5 ± 0.2 and a TiO
concentration of 1 gL
. We achieved a complementary effect on the transformation of LDPE films. With the first treatment, ablation was generated, which increased hydrophilicity. With the second treatment, the cavities appeared. The changes in the LDPE sheets' hydrophobicity were measured using the static contact angle (SCA) technique. The photocatalytic degradation curve at 400 h revealed that the DC-LPP photocatalysis sequential process decreased SCA by 82°. This was achieved by the incorporation of polar groups, which increased hydrophilicity, roughness, and rigidity by 12 and 38%, respectively. These sequential processes could be employed for LDPE and other material biodegradation pretreatment. |
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AbstractList | Low-density polyethylene (LDPE) sheets (3.0 ± 0.1 cm) received sequential treatment, first by the action of direct-current low-pressure plasma (DC-LPP) with a 100% oxygen partial pressure, 3.0 × 10
mbar pressure, 600 V DC tension, 5.6 cm distance, 6-min treatment. Then, sheets were submitted to TiO
photocatalysis at UV radiation at 254 nm (TiO
/UV) with a pH value of 4.5 ± 0.2 and a TiO
concentration of 1 gL
. We achieved a complementary effect on the transformation of LDPE films. With the first treatment, ablation was generated, which increased hydrophilicity. With the second treatment, the cavities appeared. The changes in the LDPE sheets' hydrophobicity were measured using the static contact angle (SCA) technique. The photocatalytic degradation curve at 400 h revealed that the DC-LPP photocatalysis sequential process decreased SCA by 82°. This was achieved by the incorporation of polar groups, which increased hydrophilicity, roughness, and rigidity by 12 and 38%, respectively. These sequential processes could be employed for LDPE and other material biodegradation pretreatment. |
Author | Vargas, Andrés Bogoya, Johan M Gómez-Méndez, Luis D Salcedo-Reyes, Juan C Pérez-Flórez, Alejandro Pedroza-Rodríguez, Aura M Poutou-Piñales, Raúl A Jiménez-Borrego, Luis C |
Author_xml | – sequence: 1 givenname: Luis D surname: Gómez-Méndez fullname: Gómez-Méndez, Luis D organization: Grupo de Películas Delgadas y Nanofotónica, Departamento de Física, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, DC 110-23, Colombia – sequence: 2 givenname: Luis C surname: Jiménez-Borrego fullname: Jiménez-Borrego, Luis C organization: Grupo de Películas Delgadas y Nanofotónica, Departamento de Física, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, DC 110-23, Colombia – sequence: 3 givenname: Alejandro orcidid: 0000-0001-9363-3816 surname: Pérez-Flórez fullname: Pérez-Flórez, Alejandro organization: Grupo de Investigación en Fitoquímica (GIFUJ), Departamento de Química, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, DC 110-23, Colombia – sequence: 4 givenname: Raúl A orcidid: 0000-0001-8841-2357 surname: Poutou-Piñales fullname: Poutou-Piñales, Raúl A organization: Laboratorio de Biotecnología Molecular, Grupo de Biotecnología Ambiental e Industrial (GBAI), Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, DC 110-23, Colombia – sequence: 5 givenname: Aura M surname: Pedroza-Rodríguez fullname: Pedroza-Rodríguez, Aura M organization: Laboratorio de Microbiología Ambiental y Suelos, Grupo de Biotecnología Ambiental e Industrial (GBAI), Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, DC 110-23, Colombia – sequence: 6 givenname: Juan C orcidid: 0000-0002-6209-0502 surname: Salcedo-Reyes fullname: Salcedo-Reyes, Juan C organization: Grupo de Películas Delgadas y Nanofotónica, Departamento de Física, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, DC 110-23, Colombia – sequence: 7 givenname: Andrés orcidid: 0000-0003-2444-1495 surname: Vargas fullname: Vargas, Andrés organization: Grupo de Física Matemática, Departamento de Matemáticas, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, DC 110-23, Colombia – sequence: 8 givenname: Johan M surname: Bogoya fullname: Bogoya, Johan M organization: Investigador Independiente, Bogotá, DC, Colombia |
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Title | LDPE Transformation by Exposure to Sequential Low-Pressure Plasma and TiO 2 /UV Photocatalysis |
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