Khả năng chống tia UV và khả năng kỵ nước của gỗ được xử lý bởi keo nhựa thông

Khả năng chống tia UV và khả năng kỵ nước của gỗ được xử lý bởi keo nhựa thông - đồng sunphat

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Tác giả: Thị Thanh Hiền Nguyễn

Ngôn ngữ: Vie

Ký hiệu phân loại: 674 Lumber processing, wood products, cork

Thông tin xuất bản: Nông nghiệp và Phát triển nông thôn, 2022

Mô tả vật lý: 90 - 96

Bộ sưu tập: Metadata

ID: 418530

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Tóm tắt
Chủ đề

Trong nghiên cứu này, gồ Bồ đề (Styrax tonkinensis Pierre) và gỗ Keo lai (Acacia mangium X auriculiformis) đã được ngâm tẩm vói hỗn hợp của 1%, 2% và 4% dung dịch keo nhựa thông và 3% đồng sunphat. Ảnh hưởng của keo nhựa thông - đồng sunphat đến khả năng chống chịu tia uv và khả năng kỵ nước của bề mặt gỗ xử lý đã được đánh giá thông qua việc xác định độ lệch màu của bề mặt gỗ trước và sau khi chiếu UV và góc thấm ướt của bề mặt gỗ đã xử lý. Kết quả nghiên cứu cho thấy Gỗ sau khi được xử lý bởi hỗn hợp keo nhựa thông - đồng sunphat đã làm tăng khả năng kỵ nước của bề mặt gỗ. Góc thấm ướt trung bình của bề mặt gỗ Bồ đề đạt tới 94° và của gồ Keo lai đạt 118°, tăng lên 45% và 13% so với gỗ Bồ đề và Keo lai chưa xử lý, tương ứng. Khi nồng độ của keo nhựa thông tăng lên thi góc tiếp xúc của giọt nước vói bề mặt gỗ có xu hướng tăng lên và khả năng kỵ nước của gỗ cũng tăng lên. Tuy nhiên, việc xử lý bởi hỗn hợp keo nhựa thông - đồng sunphat đã làm cho bề mặt của gỗ Bồ đề trở nên hoi sẫm màu hon, nhưng không làm ảnh hưởng đến màu sắc của bề mặt gỗ Keo lai. Đồng thời, gỗ sau khi được xử lý bỏi hỗn họp keo nhựa thòng - đồng sunphat đã nâng cao được độ ổn định màu sắc và khả năng chống tia uv của bề mặt gỗ. Nồng độ keo nhựa thông sử dụng trong nghiên cứu này không ảnh hưởng rõ ràng đến khả năng chống tia uv của bề mặt gỗ ở cả hai loại gỗ thử nghiệm., Tóm tắt tiếng anh, In this study, Styrax tonkinensis (Pierre) and Acacia hybrid wood (Acacia mangium X auriculiformis) were impregnated with the mixtures of 1%, 2%, 4% rosin sizing agent and 3% copper sulfate. The effects of rosin sizing agent - copper sulfate treatment on the UV resistance and hydrophobic characteristics of the wood surface were studied by determining the color change of the wood surface after UV exposure and the surface contact angle oftreated wood. The results showed The wood after being treated with the mixture of rosin sizing agent and copper sulfate increased the hydrophobic ofthe wood surface. The average contact angle of the treated wood surface was 94° and 118°, increased by 45% and 13% compared to untreated styrax and Acacia hybrid wood, respectively. When the concentration of rosin increases the contact angle of the treated wood surface tends to increase and the hydrophobic character of treated wood increases, too. However, rosin sizing - copper sulfate treatments caused the surface of Styrax wood to become slightly darker but it does not affect the color of Acacia hybrid wood. Meanwhile, wood after being treated with rosin sizing - copper suffate solutions improved the color stability and the uv resistance of the wood surface. However, the concentration of rosin sizing used in this study did not significantly affect the UV resistance ofwood surfaces in both test wood species.

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