Sợi in compozit

Bài viết Nghiên cứu chế tạo vật liệu compozit trên nền nhựa polyamide 6 và sợi cacbon ngắn nghiên cứu những ưu điểm của vật liệu khi sử dụng sợi cacbon ngắn làm vật liệu gia cường, đồng thời so sánh hai loại sợi cacbon của hai hãng sản xuất khác nhau với kích thước sợi ngắn dưới 300 µm.

6p viwarmachine 01-07-2023 14 3   Download

Bài viết Khảo sát quá trình chế tạo sợi in 3D compozit trên cơ sở nhựa PLA và bột nhôm mác AlSi10Mg trình bày một số kết quả trong nghiên cứu, chế tạo sợi in 3D từ vật liệu compozit trên cơ sở nhựa PLA gia cường bột nhôm mác AlSi10Mg.

9p visirius 19-01-2023 15 4   Download

This paper present the results of research on designing mold for vacuum infusion technique for preparation the polymer composite material. Specimens of varrious methods of vacuum technique have been prepared and their mechanical and structural properties have been studied. The results show that material obtained from vacuum assisted technique have a preciously mechanical properties, increased in average 45% in comparison with hand lay up method. The scanning electronic microscopy has been used for investigation on void appearance of composite materials.

8p uocvong01 24-09-2015 81 8   Download

Cotton bamboo fibers were prepared by mechanical method and their diameter were about 9- 26 µm. Surface composition and morphology of fibers were studied. The analytic result shown that most of hemicellulose and lignin were removed. There is a strong and sharp peak in the untreated bamboo spectra at about 1736 cm-1 corresponding to carbonyl group (C=O), but this peak disappeared in alkaline treated bamboo spectra. Epoxy composites reinforced cotton bamboo fiber have been developed with varying fiber contents.

5p uocvong02 24-09-2015 31 3   Download

Two chemical treatments were applied to jute fibers to create a better bonding of fiber to resin in natural composite materials. The jute fibers have been treated with hydroxide potassium (KOH) and a bleaching agent, canxi hypochlorite (Ca(OCl)2.4H2O), in varying periods. Characterization techniques such as FT-IR, SEM were used to evaluate the effect of chemical treatments on fiber structure. After treatment the surface topography of jute was clean and microfibrils were revealed, these lead to an enhancement in mechanical properties and interfacial strength between jute fiber and PP.

8p uocvong01 24-09-2015 71 7   Download

This paper presents the results of the effect content of short bamboo fiber prepared by mechanical method and alkaline treatment on mechanical properties of polymer composites (PC) based on polypropylene (PP). With content of 50% in composition, the tensile, the flexible and impact strengths have been increased as 24%, 23% and 40%, respectively in comparison with original PP. Using the prepared bamboo fiber by steam explosion method in stead of mechanical one, the tensile strength of composite increases 16%, mean while the flexible and impact strength have the equivalent value.

5p uocvong01 24-09-2015 86 9   Download

This paper showed the effect of acetylation of bamboo surface by anhydride acetic (AA) on tensile strength of polymer composite (PC) based on polypropylene (PP) reinforced by short bamboo fibers. The best conditions for acetylation is ratio of –OH to AA was 1:3, at the temperature of 100o C within 8 hours. The tensile strength of 50% fibers content’s PC has been increased in comparison with unreinforced PP.

5p uocvong01 24-09-2015 45 4   Download