東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Surface Modification of Wood Using N...

Sedhain, Ganesh.

Linked to FindBook

Google Book

Amazon

博客來

Surface Modification of Wood Using Nano-Sized Titania Particles Coated by Liquid-Precursor Flame Spray Pyrolysis.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Surface Modification of Wood Using Nano-Sized Titania Particles Coated by Liquid-Precursor Flame Spray Pyrolysis./
Author:	Sedhain, Ganesh.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	95 p.
Notes:	Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
Contained By:	Dissertations Abstracts International84-11B.
Subject:	Wood sciences. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30316524
ISBN:	9798379538705

Surface Modification of Wood Using Nano-Sized Titania Particles Coated by Liquid-Precursor Flame Spray Pyrolysis.
Sedhain, Ganesh.

Surface Modification of Wood Using Nano-Sized Titania Particles Coated by Liquid-Precursor Flame Spray Pyrolysis. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 95 p.

Source: Dissertations Abstracts International, Volume: 84-11, Section: B.

Thesis (Ph.D.)--Mississippi State University, 2023.

This item must not be sold to any third party vendors.

Wood is a renewable resource and versatile material used in tasks ranging from tools and furniture to advanced engineering structures. Although wood is light, mechanically robust, environmentally friendly, and abundant, some inherent properties of wood, such as degradation due to moisture and UV radiation from sunlight, are less desirable for extended service life and dimensional stability. In this dissertation, a novel surface modification of wood is explored by depositing nano-sized titania particles on wood veneers and cross-laminated timber (CLT) blocks by liquid-precursor flame spray pyrolysis to confer reversible wettability switching and enhanced durability to UV irradiation. The reaction between a flame source and a titanium precursor in isopropyl alcohol under controlled air pressure created a micrometer-scale thin TiO2 coating on wood that turns the treated wood superhydrophobic with a water contact angle (WCA) of {acute}{89}{AElig}150{phono}{mllhring}. Morphological studies suggest the coating is comprised of sub-100 nm TiO2 individual and aggregated particles, creating a very porous microstructure. The coating consists of TiO2 rich in the anatase phase (>60%) with an average crystal size of 18 and 32 nm for the anatase and rutile phases, respectively. The wettability switching characteristics of the surface of TiO2-wood veneers from superhydrophobicity to superhydrophilicity (WCA ~0{phono}{mllhring}) and again back to{A0}superhydrophobicity are examined through UV exposure (0.0032 W/m2 ), WCA measurements, and vacuum drying at ~0.14 mbar. The color and gloss spectrometry results of the TiO2-treated CLT samples indicate that the coating offered better resistance to discoloration and gloss change than the uncoated samples during the 8-week accelerated weathering conditions. The data shows that the FSP-treated CLT samples were more than two times more effective in preventing discoloration and changes in natural luster, as evidenced by the significant differences in L*, a*, b*, and gloss values. Moreover, the FSP treatment might have played a role in preventing weathering defects, such as splits and cracks. In addition, the FSP-treated CLT specimens were able to reduce variability in the samples more effectively than the control group. Overall, the findings of the study indicate that liquid-precursor FSP has the potential to serve as a facile, economically viable, and less energy-intensive approach to modify wooden surfaces for improved hydrophobicity, as well as to provide shielding against the deteriorating impacts of UV radiation and moisture exposure.

ISBN: 9798379538705Subjects--Topical Terms:

3168288
Wood sciences.
Subjects--Index Terms:

Titania particles

Surface Modification of Wood Using Nano-Sized Titania Particles Coated by Liquid-Precursor Flame Spray Pyrolysis.
LDR:03880nmm a2200397 4500 001 2393450
005 20240318062635.5
006 m o d
007 cr#unu||||||||
008 251215s2023 ||||||||||||||||| ||eng d
020 $a 9798379538705
035 $a (MiAaPQ)AAI30316524
035 $a AAI30316524
040 $a MiAaPQ $c MiAaPQ
100 1 $a Sedhain, Ganesh. $3 3762910
245 1 0 $a Surface Modification of Wood Using Nano-Sized Titania Particles Coated by Liquid-Precursor Flame Spray Pyrolysis.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 95 p.
500 $a Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
500 $a Advisor: Kim, Yun Sang.
502 $a Thesis (Ph.D.)--Mississippi State University, 2023.
506 $a This item must not be sold to any third party vendors.
520 $a Wood is a renewable resource and versatile material used in tasks ranging from tools and furniture to advanced engineering structures. Although wood is light, mechanically robust, environmentally friendly, and abundant, some inherent properties of wood, such as degradation due to moisture and UV radiation from sunlight, are less desirable for extended service life and dimensional stability. In this dissertation, a novel surface modification of wood is explored by depositing nano-sized titania particles on wood veneers and cross-laminated timber (CLT) blocks by liquid-precursor flame spray pyrolysis to confer reversible wettability switching and enhanced durability to UV irradiation. The reaction between a flame source and a titanium precursor in isopropyl alcohol under controlled air pressure created a micrometer-scale thin TiO2 coating on wood that turns the treated wood superhydrophobic with a water contact angle (WCA) of {acute}{89}{AElig}150{phono}{mllhring}. Morphological studies suggest the coating is comprised of sub-100 nm TiO2 individual and aggregated particles, creating a very porous microstructure. The coating consists of TiO2 rich in the anatase phase (>60%) with an average crystal size of 18 and 32 nm for the anatase and rutile phases, respectively. The wettability switching characteristics of the surface of TiO2-wood veneers from superhydrophobicity to superhydrophilicity (WCA ~0{phono}{mllhring}) and again back to{A0}superhydrophobicity are examined through UV exposure (0.0032 W/m2 ), WCA measurements, and vacuum drying at ~0.14 mbar. The color and gloss spectrometry results of the TiO2-treated CLT samples indicate that the coating offered better resistance to discoloration and gloss change than the uncoated samples during the 8-week accelerated weathering conditions. The data shows that the FSP-treated CLT samples were more than two times more effective in preventing discoloration and changes in natural luster, as evidenced by the significant differences in L*, a*, b*, and gloss values. Moreover, the FSP treatment might have played a role in preventing weathering defects, such as splits and cracks. In addition, the FSP-treated CLT specimens were able to reduce variability in the samples more effectively than the control group. Overall, the findings of the study indicate that liquid-precursor FSP has the potential to serve as a facile, economically viable, and less energy-intensive approach to modify wooden surfaces for improved hydrophobicity, as well as to provide shielding against the deteriorating impacts of UV radiation and moisture exposure.
590 $a School code: 0132.
650 4 $a Wood sciences. $3 3168288
650 4 $a Materials science. $3 543314
650 4 $a Nanoscience. $3 587832
653 $a Titania particles
653 $a Spray pyrolysis
653 $a Liquid-precursor
653 $a Cross-laminated timber
653 $a Superhydrophilicity
690 $a 0746
690 $a 0565
690 $a 0794
710 2 $a Mississippi State University. $b College of Forest Resources. $3 3762911
773 0 $t Dissertations Abstracts International $g 84-11B.
790 $a 0132
791 $a Ph.D.
792 $a 2023
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30316524