본 총설에서는 외부에 사용되는 목재를 풍화인자로부터 보호하기 위해 실행되고 있는 최근의 연구동향에 대해 조사 분석하였다. 주요 기상열화 인자로부터 목재의 표면 보호를 위한 연구 동향에 대하여 조사한 결과 다음과 같은 결론을 얻었다. 목재보존제로 사용된 크롬, 구리 등의 무기화합물이 목재를 기상열화로부터 보호할 수 있는 것으로 보고되었다. 또한 ACQ처리 목재의 표면에 wax나 oil같은 소수성물질과 UV 흡수제, HALS(Hindered Amine Light Stabilizers) 등을 방부목재 표면에 precoating하면 기상열화 저항성을 강화할 수 있다고 보고되었다. 또한 방부목재 표면에 불투명 도막형성의 페인트/스테인 및 반투명스테인등이 기상열화방지에 대한 시너지 효과가 높힐수 있다는 보고들이 다수 있었다. 또한 방부목재의 표면보호를 위한 재도장 처리의 필요성이 시사되었다. 투명성의 도막에 UV방지를 위한 첨가물로서 미세입자의 ZnO 또는 $TiO_2$, Co, Cr, Fe, Mn, Ni과 Ti 등의 금속이온, Tris-resorcinol triazine derivatives, triazine 및 Benzotriazole과 같은 UV흡수제 등이 소개되었다. Methylation, acetylation 또는 alkylation 등과 같이 화학적으로 개질된 경우에는 이로 인한 중량증가가 높은 경우 기상열화 방지효과가 상승된다는 연구들이 소개되었다, 열처리목재의 기상열화 저항성에 대해서는 여러 가지 상반되는 연구보고 들이 있었고, UV저항성을 지닌 도장의 필요성이 강조된 보고가 있어 보다 심도 있는 연구의 필요성이 시사되었다.
본 총설에서는 외부에 사용되는 목재를 풍화인자로부터 보호하기 위해 실행되고 있는 최근의 연구동향에 대해 조사 분석하였다. 주요 기상열화 인자로부터 목재의 표면 보호를 위한 연구 동향에 대하여 조사한 결과 다음과 같은 결론을 얻었다. 목재보존제로 사용된 크롬, 구리 등의 무기화합물이 목재를 기상열화로부터 보호할 수 있는 것으로 보고되었다. 또한 ACQ처리 목재의 표면에 wax나 oil같은 소수성물질과 UV 흡수제, HALS(Hindered Amine Light Stabilizers) 등을 방부목재 표면에 precoating하면 기상열화 저항성을 강화할 수 있다고 보고되었다. 또한 방부목재 표면에 불투명 도막형성의 페인트/스테인 및 반투명스테인등이 기상열화방지에 대한 시너지 효과가 높힐수 있다는 보고들이 다수 있었다. 또한 방부목재의 표면보호를 위한 재도장 처리의 필요성이 시사되었다. 투명성의 도막에 UV방지를 위한 첨가물로서 미세입자의 ZnO 또는 $TiO_2$, Co, Cr, Fe, Mn, Ni과 Ti 등의 금속이온, Tris-resorcinol triazine derivatives, triazine 및 Benzotriazole과 같은 UV흡수제 등이 소개되었다. Methylation, acetylation 또는 alkylation 등과 같이 화학적으로 개질된 경우에는 이로 인한 중량증가가 높은 경우 기상열화 방지효과가 상승된다는 연구들이 소개되었다, 열처리목재의 기상열화 저항성에 대해서는 여러 가지 상반되는 연구보고 들이 있었고, UV저항성을 지닌 도장의 필요성이 강조된 보고가 있어 보다 심도 있는 연구의 필요성이 시사되었다.
A review of research trends on wood surface protection for exterior use obtained the following conclusions: It has been reported that inorganic compounds such as chrome and copper used as wood preservatives can protect wood from weathering. It has been shown that precoating with hydrophobic substanc...
A review of research trends on wood surface protection for exterior use obtained the following conclusions: It has been reported that inorganic compounds such as chrome and copper used as wood preservatives can protect wood from weathering. It has been shown that precoating with hydrophobic substances such as wax and oil, UV absorbers, and HALS (Hindered Amine Light Stabilizers) enhances weathering resistance on the surface of ACQ-treated wood. Opaque coatings of paint/stains and semitransparent stains on the surface of preservative treated wood can increase the synergistic effects on prevention of weathering deterioration. Also the need for repainting periodically for the protection of the preservative treated wood surface has also been suggested. ZnO or $TiO_2$ of fine particles, metal ions such as Co, Cr, Fe, Mn, Ni and Ti, and UV absorbers such as tris-resorcinol triazine derivatives, triazine and benzotriazole were introduced as additives for preventing UV in the transparent coating on wood. Several reports showed that chemical modification such as methylation, acetylation, or alkylations have made some increases the effects of preventing weathering with the increasing weight gain of chemical formulas. In heat-treated wood, there were various contradictory reports on the resistance of weathering, and there were some other reports emphasizing the necessity of painting with UV resistance, which leads to the necessity of more advanced studies.
A review of research trends on wood surface protection for exterior use obtained the following conclusions: It has been reported that inorganic compounds such as chrome and copper used as wood preservatives can protect wood from weathering. It has been shown that precoating with hydrophobic substances such as wax and oil, UV absorbers, and HALS (Hindered Amine Light Stabilizers) enhances weathering resistance on the surface of ACQ-treated wood. Opaque coatings of paint/stains and semitransparent stains on the surface of preservative treated wood can increase the synergistic effects on prevention of weathering deterioration. Also the need for repainting periodically for the protection of the preservative treated wood surface has also been suggested. ZnO or $TiO_2$ of fine particles, metal ions such as Co, Cr, Fe, Mn, Ni and Ti, and UV absorbers such as tris-resorcinol triazine derivatives, triazine and benzotriazole were introduced as additives for preventing UV in the transparent coating on wood. Several reports showed that chemical modification such as methylation, acetylation, or alkylations have made some increases the effects of preventing weathering with the increasing weight gain of chemical formulas. In heat-treated wood, there were various contradictory reports on the resistance of weathering, and there were some other reports emphasizing the necessity of painting with UV resistance, which leads to the necessity of more advanced studies.
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문제 정의
This chapter includes a review of researches that show such surface protection effects of wood preservatives from weathering.
This study aimed to analyze the research trends, by a literature review, on various protection technologies for the wood surface from weathering factors. Specifically, the main concern was to investigate the research results subjected to the weathering prevention of wood preservatives, wood surface treatment for leaching prevention of wood preservatives and enhancement of surface protection from weathering, various additives and coating techniques, chemical modification techniques, and heat treatments for the maintenance of aesthetic quality of wood and surface protection.
가설 설정
1. Inorganic compounds such as chrome and copper used as wood preservatives can protect wood from weathering.
제안 방법
Another natural weathering test with oriental beech and scots pine treated with copper or boron-based new preservatives such as Tanalith-E & Adolit-KDS and coated with synthetic varnish and polyurethane varnish was conducted.
성능/효과
3. Opaque coatings of paint/stains and semitransparent stains on the surface of preservative treated wood can increase synergy effects on prevention of weathering deterioration.
5. ZnO or TiO2 of fine particles, metal ions such as Co, Cr, Fe, Mn, Ni and Ti, and UV absorbers such as tris-resorcinol triazine derivatives, triazine and benzotriazole were introduced as additives for preventing UV in the transparent coating on wood.
6. Chemical modification such as methylation, acetylation, or alkylations have increased the effect of preventing weathering with the increasing weight gain of chemical formulas.
While CCA-treated wood showed better waterproofing property with oil-based paint than water-based paint, but ACQ and CuAz-treated wood did not show any significant differences between oil-based and water-based paint. Furthermore, compared to untreated wood, CCA, ACQ and CuAz-treated wood showed less discoloring, but there was no significant differences in surface cracking between treated and untreated woods, and the surface coating on the preservative treated wood would reduce surface cracking by 30 to 40%, also reducing the weathering potential by surface cracking. Sivrikaya et al.
Furthermore, Natale & Vidal (2017) coated oil varnish and paint on the treated wood with water-borne preservative [CCB (Copper Chromated Boron)] and oil-borne preservative (IPBC & Cypermethrin), and conducted a natural weathering test for eight months in Luiz Antonio, Brazil. The results showed that over 90% brightness variation and surface cracking in all test deck specimens, and only CCBtreated wood showed the least discoloring and surface cracking, indicating that preservatives with inorganic components would be effective in preventing weathering. Another natural weathering test with oriental beech and scots pine treated with copper or boron-based new preservatives such as Tanalith-E & Adolit-KDS and coated with synthetic varnish and polyurethane varnish was conducted.
후속연구
, 2000a). Furthermore, it has been reported that the acetate that was generated in the acetylation process remains on wood, promoting the oxidation of wood components, when exposed outdoor environments in particular, the acetylation would not greatly improve the resistance for weathering, and thus, further advanced research is required on this subject (Rowell, 2013; Imamura, 1993). In addition, there are other chemical modification methods of protecting wood from discoloring, cracking, or photo-degradation.
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