Surface modification method of anhydrous calcium sulfate whisker

• Main Authors: ZHU DONGHAI, LI WU, NAI XUEYING, LYU ZHIHUI, DONG YAPING, HONG TIANZENG
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2016
• Subjects: ADHESIVES; CHEMISTRY; DYES; IMPREGNATING OR COATING OF PAPER; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; POLISHES; PREPARATION OF CARBON BLACK; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

The invention discloses a surface modification method of anhydrous calcium sulfate whisker. The method comprises the following steps: 1, placing the anhydrous calcium sulfate whisker in a first solvent, and uniformly mixing the anhydrous calcium sulfate whisker with the first solvent to obtain a slurry; 3, placing a modifier in a second solvent to obtain a mixed solution, and adding an alkali solution to the mixed solution until the pH value of the mixed solution is 12-14 in order to obtain a modified solution, wherein the modifier is alkyl phosphate or alkyl phosohate salt; and 3, adding the modified solution to the slurry, and mixing the modified solution and the slurry to carry out surface modification in order to obtain modified anhydrous calcium sulfate whisker, wherein the first solvent and the second solvent are selected from anhydrous ethanol and water. The surface modification method of the anhydrous calcium sulfate whisker can achieve a good modification effect in order to make the anhydrous calcium