摘要
通过测定单位体积去水化水分子数、水溶液粘度和盐粘比值,在相同负离子(Cl^-)浓度下研究了 NaCl、MgCl_2、CaCl_2、SrCl_2、BaCl_2对轻度交联改性羧甲基羟丙基纤维素(CMHPC)水溶液粘性行为的影响。结果表明,影响因素有盐(金属离子)的去水化能力、盐浓度、轻度交联改性 CMHPC 的浓度、羧甲基取代度、羟丙基取代度等。
The effects of inorganic salts NaCl,MgCl_2,CaCl_2,SrCl_2,and BaCl_2 on the proper- ties of aqueous solutions of slightly erosslinked modified carboxymethyl hydroxypropyl celluloses (mCMHPCs) are studied experimentally in the basis of equal chloride ion concentrations.Quantitative determinations of the amount of dehydration water molecu- les per unit volume of aqueous mCMHPC solutions caused by introduction of salts show that the dehydrating capacity of these salts increases in order Na^+<Mg^(++)<Ca^(++)<Sr^(++) >Ba^(++).Salts in low concentrations decrease the solution viscosity in the amplitude corresponding to their dehydrating capacity.The solution viscosity,however,begins to increase when the salt concentrations become high enough.The more concentrated mMCHPC solutions are more tolerant to inorganic salts.Increasing degree of carboxy- methyl substitution in mCMHPCs leads to enhancing their viscosity in pure water and NaCl-containing solutions but to reduciug their tolerence to dehydration by alkali-earth metal ions.Increasing degree of hydroxypropyl substitution has opposite effects.
出处
《油田化学》
CAS
CSCD
北大核心
1992年第2期110-115,共6页
Oilfield Chemistry
基金
国家科研基金项目
编号59173128。
关键词
纤维素衍生物
水溶液粘度
无机盐
Cellulose Derivatives
Slightly Crosslinked Modified Carboxymethl Hydroxypropyl Celluloses
Aqueous Solution Viscosity
Inorganic Salts
Tolerence to Inorganic Salts
