摘要
首次系统研究松香醇与环氧乙烷的加成反应。在低温条件下,此反应属于离子对机理,高温下为离子机理,得出较适宜的反应条件:催化剂KOH,用量为松香醇用量的0.5%～0.6%,温度150℃,压力0.2～0.3MPa,脱水条件100～140℃/1.33kPa,30min。测定了合成产品的表面物理化学性能:表面张力(δ)达到33.0～39.8dyn/cm;临界胶束浓度(CMC)在10-4数量级;钙皂分散指数(LSDP)5.1%～13.5%;对松节油乳化力(EP)为64～185s;浊点(CP)26～77℃;HLB值8.9～16.2。研究了环氧乙烷聚合度(n)对产品表面物理化学性能的影响:随着n的增加,δ先下降,然后逐渐上升,CMC、LSDP、CP、HLB值逐渐升高,EP先升高,到n=10时,变化趋于平缓。
A series of polyethoxylated rosin alcohols(RAEO) of different oxyethylene units(n) were synthesized.Addition reaction of rosin alcohol with epoxy ethane was investigated.Suitable reaction conditions were obtained as follows: amount of catalyst KOH for addition of rosin alcohol with epoxy ethane(EO) 0.5%-0.6%\,reaction temperature 150 ℃,reaction pressure 0.2-0.3 MPa,condition of water removal 100-140 ℃/1.33 kPa,30 min.Surface physicochemical properties of the products were measured.Results showed that surface tension(δ) varied from 33.0 to 39.8 dyn/cm,critical micelle concentration(CMC) 1.8×10-4-3.9×10-4,lime soap dispersing power(LSDP) 5.1%-13.5%,emulsifying power(EP,with turpentine) 64-185 s,cloud point 26-77 ℃,HLB value 8.9-16.2.Relations between surface physicochemical properties of the products and polymerization degree of ethylene oxide(EO) were first studied systematically.With the increase of polymerization degree(n) of EO,surface activity was increased first,then kept stable or declined slightly.Application properties,such as EP and LSDP,were elevated with increase of n,and balanced at n upto 10.RAEO10 is an ideal demulsifier,which corresponds to the commercial product XBP2000.
出处
《林产化学与工业》
EI
CAS
CSCD
2003年第1期7-11,共5页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(30070638)
关键词
松香醇
聚氧乙烯醚
表面活性剂
rosin alcohol
polyoxylethylene ether
surfactants
