摘要
在水溶液中,以丙烯酸(AA)、羧甲基纤维素(CMC)和聚乙二醇(PEG)为原料,N,N'-亚甲基双丙烯酰胺(MBA)为交联剂,用辉光放电电解等离子体(GDEP)技术引发制备羧甲基纤维素/聚乙二醇/丙烯酸(CMC/PEG/AA)高吸水性复合材料。考察了温度、pH、盐浓度对复合材料平衡溶胀率的影响,初步研究了复合材料对染料亚甲基蓝的吸附行为。结果表明,CMC/PEG/AA高吸水性复合材料在30℃蒸馏水中的最大溶胀率达到1 115 g/g;该复合材料具有pH敏感性、盐敏感性和可逆溶胀-消溶胀开关行为;其对亚甲基蓝的吸附量可达1 878.8 mg/g,吸附行为遵循动力学拟二级模型。
A carboxymethyl cellulose/poly （ethylene glycot）/acrylic acid （CMC/PEG/AA） superabsorbent composite was prepared in aqueous solution using glow-discharge electrolysis plasma （GDEP） induced eopolymerization of carboxymethyl cellulose （ CMC ）, poly （ ethylene glycol ） （PEG） and acrylic acid （AA）, in which N, N＇-methylenebisaerylamide （MBA） was used as a crosslinker. The influences of temperature ,various pH values and sahs solutions on the equilibrium swelling ratio were studied in detail. The adsorption of methylene blue （MB） on the CMC/PEG/AA was tentatively investigated. The results show that the maximum equilibrium swelling ratio of CMC/PEG/AA in distilled water was 1 115 g,/g at 30℃ The CMC/PEG/AA superabsorbent composite was responsive to pH and salts, and it had excellent on-off switching behavior as reversible swelling and deswelling. In addition, the maximum adsorption capacity of CMC/PEG/AA for MB was 1 878.8 mg/g. The adsorption kinetics fitted the pseudo-second-order model.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2013年第12期1353-1358,共6页
Fine Chemicals
基金
国家自然科学基金(21367023)
甘肃省自然科学基金(1208RJZA161
1308RJZA144)
西北师范大学青年教师科研能力提升计划(NWNU-LKQN-10-16
NWNU-LKQN-12-9)~~
关键词
羧甲基纤维素
聚乙二醇
丙烯酸
高吸水性复合材料
平衡溶胀率
吸附
功能材料
carboxymethyl cellulose
poly （ ethylene glycol ）
acrylic acid
superabsorbent composite
equilibrium swelling ratio
adsorption
functional materials
