两种海藻酸钙膜的制备及吸水性能  

Preparation and Performance of Two Kinds of Calcium Alginate Membranes

作　　者：郝晓丽[1] 夏延致[1] 王兵兵[1] 纪全[1] 孔庆山[1] 隋坤艳[1] 

机构地区：[1]青岛大学纤维新材料与现代纺织国家重点实验室培育基地,山东青岛266071

出　　处：《高分子材料科学与工程》2010年第4期143-145,共3页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50673046)

摘　　要：分别采用冷冻干燥法和自然晾干法制备海藻酸钙膜材料,考察比较了两种海藻酸钙膜材料的形貌及吸水性能。海藻酸钙自然晾干膜为无色透明膜,冻干膜为白色海绵膜,且冻干膜与晾干膜相比具有开放、贯通的多孔结构,其孔径介于100μm～200μm之间。海藻酸钠质量百分比含量为2%时,晾干膜和冻干膜对蒸馏水的吸水率分别为78.7%和985.0%,经3500r/min离心3min后保水率分别为42.5%和81.8%,两膜材料均具有较好的重复使用性能,其中反复吸水-放水4次后冻干膜的吸水率仍高达869.4%。Two kinds of Calcium alginate membranes were obtained by normal-dried and freeze-dried methods respectively. Typical morphologies and properties were evaluated,including scanning electron microscopy,water absorption rate,retention rate and repeatability. Results show that the normal-dried membrane is colorless and transparent membrane and the freeze-dried membrane is white sponge. The freeze-dried membrane possesses interconnected and uniform pore structure,whose average pore size is 100 μm～200 μm. The absorbency of the normal-dried membrane and freeze-dried membrane in distilled water is 78.7% and 985.0%,and the water retentiveness is 42.5% and 81.8% when 3500 r/min for 3 minutes. Two kinds of membranes both can be repeatedly utilized. The absorbency of freeze-dried membrane keeps still 869.4% as repeated 4 times.

关 键 词：海藻酸钙 冷冻干燥 多孔膜 吸水性能 

分 类 号：TB383[一般工业技术—材料科学与工程]