【作者】 廖合；

【导师】 黄显南；

【作者基本信息】 广西大学 ， 制浆造纸工程， 2007， 硕士

【摘要】 强化木地板作为一种新型环保建材产品，近年来已经成为室内地面装饰材料的主流产品，而其高档耐磨表层纸80％依赖进口，价格昂贵，制约国产强化木地板的发展。针对这一现状，本课题引进超细粉体材料和“液体耐磨”工艺研制一种集装饰功能与高耐磨性能于一体、生产成本很低的耐磨层，对其制备过程进行了比较系统的研究，并初步探讨了液体耐磨层的耐磨机理及磨损机理。首先研究了超细粉体Al₂O₃在水中的分散行为，结果表明：浓度5wt％超细Al₂O₃，pH=9，阴离子型分散剂用量为0.4wt％，超声分散120min，超声波分散水温40℃，此时可获得稳定的超细粉体Al₂O₃水分散液。然后，用偶联剂KH-550对超细粉体Al₂O₃进行表面改性，红外光谱和热分析表明，偶联剂KH-550成功与超细粉体Al₂O₃表面产生了共价键吸附，其吸附量约2.0％～4.0％。接着，研究了超细粉体Al₂O₃分散于三聚氰胺甲醛树脂中，制取耐磨胶乳液。研究表明：配胶温度60℃、搅拌时间25min、搅拌速度300转／min、树脂含量50％，乳化剂用量1.0％，固化剂用量0.5％，脱模剂用量0.5％，Al₂O₃用量10％～20％，贮存温度20～40℃，为最佳的配胶条件。电镜扫描照片表明此时超细粉体Al₂O₃在三聚氰胺甲醛树脂中的分散均匀。最后，论文研究了液体耐磨层的耐磨性能，并探讨了其耐磨机理及磨损机理。研究表明，当耐磨材料Al₂O₃用量增加到15.4g／m²时，初始磨点（IP值）和最终磨点（FP值）分别提高至4000转和5200转以上，达到国家标准规定家庭用的耐磨转数的要求。对耐磨机理及磨损机理进一步研究表明：液体耐磨层耐磨性依赖于树脂基体、增强材料和界面粘结性能的优劣，而磨损过程，发生由基材到填料的选择性磨损，实现了磨损机理由粘着磨损向磨料磨损的转变。更多还原

【Abstract】 Laminate-timber floor is a new environment-friendly building material, soit is popular in late years as new decorative material used to the indoor-ground.However, the wear resisting overlay of laminate-timber floor is expensive and80% excellent-quality products depend on the import products and contrainedthe development of laminate-timber floor in china. Aimed at this situation, thispaper introduces superfine powdered materials and liquid wear resistant coatingto develop a new low-costing wearing coat with decorative function and highwear-resiting property. The process of manufacture was systematicallyresearched, and then we studied the mechanism of wear-resisting and wear-outof liquid wear-resistant coating.Firstly, superfine-alumina aqueous dispersion was studied.The resultsshowed that when condition was dispersant W-518=0.4wt%, pH=9,superfine-alumina content=5wt%, ultrasonic for 120minutes, temperature=40℃, excellent stable superfine-alumina aqueous dispersion can be acquired.After that, the surface modification of superfine-alumina with silanecouling reagent KH-550, was studied. According to the spectra of FTIR, TG andDTA, it was inferred that the KH-550 was covalent bond on the surface ofsuperfine-alumina pariticles, Adsorptive capactity was about 2%～4%.Continued, wear-resisting latex can be prepared by mixingsuperfine-alumina with melamine resin, was studied. The results showed thatwhen condition was temperature=40℃, stirring time=25minutes, stirringspeed=300r/min, resin content=50%,emulsity agant=1%, solidified agent=0.5%,mold releasing agent=0.5%, superfine-alumina content=10～20%, storagetemperature=20～40℃, excellent wear-resisting latex can be acquired. Datefrom SEM indicated that superfine-alumina uniform dispersion in melamineresin.At last, we studied the properties and mechanism of wear-resisting andwear-out of liquid wear-resistant coating. The results showed that liquidwear-resistant coating initial wear point is 4000r and final wear point is 5200rwhen superfine-alumina amount coated on the paper reach to 15.4 g/m~2. Thatmeasure up to the national standards of used in household indoor-ground. Theresults also showed that abrasion resistance of liquid wear-resistant coatingdepond on perfbrmance of parent material, reinfarced material、interfacebetween resins and inorganic antifriction materials. In the wearing process, Wearmaterials were chosen from resin to superfine powdered materials. The coating’s abrasion mechanism is conversed from adhere wearing to abrasive stuff wearing.更多还原