51 results about "Naphthalenetetracarboxylic dianhydride" patented technology

The invention provides a surfactant as well as a preparation method and application thereof. The surfactant has relatively high surface activity and good foaming and foam stabilization effects. The molecule of the surfactant comprises 4 hydrophobic chain segments and hydrophilic units, wherein the hydrophobic chain segments are alkyl chains containing 8-18 carbon and the hydrophilic units are quaternary ammonium salt radicals; and the hydrophobic chain segments and the hydrophilic units are in covalent linkage at the part adjacent to quaternary ammonium salt through a bridge connection unit with an aromatic ring structure. The preparation method comprises the following steps: firstly, enabling aromatic tetracarboxylic dianhydride and dibromoethane to react, so as to generate an intermediate with four branch chains; and then enabling the intermediate and alkyl dimethyl tertiary amine to react so that the intermediate is modified with the quaternary ammonium salt radicals with positive charges and hydrophilic carbon chains, wherein the aromatic tetracarboxylic dianhydride is pyromellitic dianhydride, 1,4,5,8-naphthalenetetracarboxylic dianhydride or 3,4,9,10-perylenetetracarboxylic dianhydride, and the alkyl dimethyl tertiary amine is R-N(CH3)2, wherein R is CH3(CH2)n and n is an integer of 7-17.

The invention relates to a phosphonic acid doped cross-linked sulfonated polyiminobenzimidazole high-temperature proton exchange membrane and a preparation method thereof. The preparation method includes: 1), in a nitrogen atmosphere, dissolving diaminodisulfonic acid in a solvent to obtain a diaminodisulfonic acid solution, adding benzidine, aminophenylbenzimidazole and naphthalene tetracarboxylic acid dianhydride into the diaminodisulfonic acid solution, fully stirring well at room temperature, heating for reaction, naturally cooling to room temperature, adding a diluent, fully stirring, filtering, washing and drying solid substance which is filtered out to obtain sulfonated polyiminobenzimidazole; 2), dissolving the sulfonated polyiminobenzimidazole in dimethylsulfoxide to obtain a solution, adding dibromodiphenyl ether, mixing well, and allowing reaction to obtain a high-temperature proton exchange membrane; 3), disposing the high-temperature proton exchange membrane in an amino trimethylene phosphonic acid water solution for soaking, washing, and heating for reaction to obtain the phosphonic acid doped cross-linked sulfonated polyiminobenzimidazole high-temperature proton exchange membrane.