有机锆对羧甲基羟丙基瓜胶的交联性能研究

Study on the crosslinking properties of the organic zirconium/carboxymethyl hydroxypropyl guar gum

以氧氯化锆和柠檬酸等为原料,合成了适用于羧甲基羟丙基瓜胶在酸性条件下交联的有机锆交联剂,考察了pH值、温度、羧甲基羟丙基瓜胶和交联剂加量等对体系成胶时间的影响,评价了形成冻胶的抗温抗剪切性能、滤失性能和破胶性能。实验发现,在pH值为3.0时,羧甲基羟丙基瓜胶/有机锆体系具有可控的延缓交联特性,质量分数为0.5%和0.6%的羧甲基羟丙基瓜胶在交联比为100∶1.6～2时形成的冻胶具有较好的剪切稳定性,较低的滤失量,且破胶彻底,残渣含量低。

The zirconium-organic crosslinker,which can be used for carboxymethyl hydroxypropyl guar gum in acidic condition,was synthesized using zirconium oxychloride and citric acid as raw material.The effects of pH value,temperature,cross-linking agent and carboxymethyl hydroxypropyl guar gum amount on crosslinking time have been discussed.The gel prepared under zirconium-organic crosslinker,whose stability of temperature resistance and shear,filtration properties and gel breaking performance on gel formation has been evaluated.When pH value was 3.0,the results showed that carboxy-methyl hydroxypropyl guar gum/organic zirconium system has a property of controllable delay crosslinking properties,and with the mass fraction of carboxymethyl hydroxypropyl guar gum is 0.5% and 0.6%and the crosslinking rate 100∶1.6 to 100∶2.0,the gel prepared showed good shear stability and low filtration.Moreover,the gel broke completely and had a low residue.