Surface grafting

In this study, the effect of alkaline-treated spent coffee grounds and compatibilizer on the mechanical properties of bio-composite based on polypropylene (PP) matrix was investigated. After alkaline treatment, the surface of spent coffee grounds became rougher; hence the PP matrix could better adsorb and encapsulate the treated coffee grounds compared with that of untreated ones. T

6p dianmotminh02 03-05-2024 4 2   Download

The article will be focused on methods of chemical modification of NR and the use of improved traditional fillers such as carbon black (CB) and silica. Modification reactions include epoxidation, hydrogenation, and grafting vinyl monomers onto NR molecules. Some methods of surface modification of NR film were also reviewed. Thanks to modification the NR degree of unsaturatiton is decrease that leads to its enhanced aging resistance.

15p dianmotminh02 03-05-2024 4 2   Download

The goals of the study are: Comment the clinical features of the gum receding cases; evaluate the results of surgery about its safety, recovering the denuded roots and changes of the gingival index.

26p tamynhan0 15-06-2020 16 1   Download

Bài báo này trình bày một số kết quả nghiên cứu khả năng loại bỏ axit humic trong nước bằng phương pháp lọc màng, sử dụng màng compozit biến tính bề mặt bằng kỹ thuật trùng hợp ghép quang hóa với poly etylen glycol dưới bức xạ UV.

6p estupendo5 31-08-2016 75 3   Download

A complete and permanent hydrophilic modification of poly (ethyleneterephthalate) (PET) films is achieved by argon-plasma irradiation, subsequently grafting acrylic acid (AA) in vapor phase onto their surface. Both Ar plasma irradiation alone and post grafting AA rendered a complete hydrophilicity to PET surfaces. However, the hydrophilicity of the PET surface, only treated with the Ar plasma, is not permanent. In contrast, PET films, irradiated by the Ar plasma, exposed to air, and subsequently grafted with AA monomer, are permanently hydrophilic.

10p uocvong01 24-09-2015 57 3   Download

The degree of conservation of three-dimensional folds in protein superfami-lies is greater than that of amino acid sequences. Therefore, very different groups of residues (and schemes of residue packing) can be found displayed upon similar structural scaffolds.

13p viettel02 22-02-2013 43 3   Download

A lifetime risk of melanoma development of 6% has been estimated. The risk is greatest before age 5 and next greatest between ages 5 and 10. Early detection of melanoma is difficult in these lesions because of the deep dermal or subcutaneous origin of primary melanoma and because of the large and varied surface of the nevus. Prophylactic excision early in life can be accomplished by staged removal with coverage by split-thickness skin grafts. Surgery cannot remove all at-risk nevus cells as some may penetrate into the muscles or central nervous system below the nevus. At present there are...

5p konheokonmummim 03-12-2010 76 7   Download