Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Yingping Qi"'
Publikováno v:
Medžiagotyra, Vol 29, Iss 1, Pp 58-64 (2023)
As an important part of cultural heritage, paper cultural relics have important historical, scientific and humanistic values. However, a large number of paper cultural relics are suffering from aging, mildew, yellowing, cracks, embrittlement and othe
Externí odkaz:
https://doaj.org/article/cd3f4e315301462184a6622b7bf49050
Publikováno v:
Medžiagotyra, Vol 28, Iss 1, Pp 60-67 (2022)
Cellulose is a rich natural polymer material, which has the characteristics of biodegradability, environmental friendliness and good biocompatibility. However, compared with conventional materials, there are some shortcomings in performance, such as
Externí odkaz:
https://doaj.org/article/95e734efc80748b2a717f8e209ed839d
Publikováno v:
Medžiagotyra, Vol 27, Iss 1, Pp 63-67 (2021)
A novel epoxy cyclohexane-based polyurethane material was synthesized from a self-made epoxy cyclohexane-tetrahydrofuran (CHO-THF) co-polyether. Due to the special rigid six-membered ring skeleton in the polyether molecular chain, the polyurethane ma
Externí odkaz:
https://doaj.org/article/1ff4482fc23b4c77b6a935bfb0ad6521
Publikováno v:
Medžiagotyra, Vol 26, Iss 3, Pp 323-332 (2020)
The polycarbonate polyols(PCD) obtained by ring-opening polymerization of a general cyclic monomer is mostly a linear flexible structure, which is used as a raw material to synthesize polyurethanes, and it is difficult to simultaneously ensure good t
Externí odkaz:
https://doaj.org/article/0020dd8add01467cafc2dcd743fe2414
Publikováno v:
Medžiagotyra, Vol 26, Iss 3, Pp 343-347 (2020)
Epoxycyclohexane-epichlorohydrin polyether polyol was synthesized by using epoxy cyclohexane and epichlorohydrin as raw materials, glycerol as an initiator, dichloromethane as solvent and aluminum chloride as catalysis. The structure of the copolyeth
Externí odkaz:
https://doaj.org/article/1d68f932307c4945805435a4c9ca4afd
Publikováno v:
To Chemistry Journal, Vol 6 (2020)
Aim: The aim of this study is to investigate the antimicrobial properties of organic guanidine because of their strong alkalinity, high stability, low toxicity and good biological activity. Methods: By referring to the relevant domestic and foreign l
Externí odkaz:
https://doaj.org/article/1942079562d44f129af4c546ebe904ce
Publikováno v:
To Chemistry Journal, Vol 2 (2019)
The Poly(Sodium Styrenesulfonate) / nano Pt / graphene (PSS/Pt/GR) composite modified electrode material was prepared and characterized by transmission electron microscopy(TEM), infrared spectroscopy and alternating current impedance. The electrochem
Externí odkaz:
https://doaj.org/article/05abbf8070f04c049893451684cde8ae
Publikováno v:
To Chemistry Journal, Vol 1, Iss 2 (2018)
Chitosan has good film-forming property, adsorption, biocompatibility, biodegradability and antimicrobial properties, but it can only be dissolved in weak acidic aqueous solution and cannot be directly dissolved in water, which greatly limits its app
Externí odkaz:
https://doaj.org/article/9bc5c5adc6624fc9b20115faf09a89fe
Publikováno v:
To Chemistry Journal, Vol 1, Iss 2 (2018)
In order to improve the strength of paper, solve the problem of poor permeability of traditional resins to paper, the low molecular weight hexamethylenediisocyanate (HDI) trimer was investigated, and the chemical and physical properties of paper samp
Externí odkaz:
https://doaj.org/article/dd7e2656e8f84f74bbd3e1334a702776
Publikováno v:
To Chemistry Journal, Vol 1, Iss 2 (2018)
In order to solve the problem of poor compatibility of traditional resins, improve its adhesion, toughness, corrosion, heat resistance, salt spray, and other properties of the coating, the epoxy resin and polyurethane was modified with organic silico
Externí odkaz:
https://doaj.org/article/c5aea7856f3c463e9f72a44e7a7ad512