Research On Preparation Of Organogel Loaded V_C And It's Application In Margarine

Unhealthy fats(saturated fats and trans fats)in traditional plastic fats such as margarine are very detrimental to human health,excessive intake will increase the level of cholesterol in the body,leading to thrombosis,atherosclerosis and cardiovascular and other chronic diseases,so there is an urgent need to find a new way to replace the traditional plastic fats.Oleogels get more attentions for it's pure physical preparation and no trans fatty acids,however,their single nutrients and instability during storage greatly limit their application in food industry.In this study oleogels loaded with V_C were prepared,and based on this we prepared margarine based oleogels to replace part of the high trans fatty acid content of margarine products in market.Firstly,the physical properties of oleogels loaded with V_C were studied.The results showed that monoglycerides can produce non-covalent interactions(hydrogen bonds)with oil at the network crosslinking,meanwhile more monoglycerides added,more crystals the gel system can form,making the network structure more compact.Considering the performance and cost,the study used 12% monoglyceride addition.The crystallization temperature of 0 ? is more favorable for crystal growth,and the presence of subcooling makes the small clusters accumulate easily to form large clusters of crystals,but the crystal melts partially under high temperature.The different macro performances of oleogels based on different kinds of oils are caused by oil's inherent properties and the interaction between oil and gelling agent.The result of strength of oleogel based on different oil is corn oil>camellia oil>linseed oil.This is the results of the interaction between hydrogen bonding formed by oil and gel and the separation effect due to oil's mobilitySecondly,the factors affecting V_C loading capacity(LC)of oleogel and stability during storage were studied.The effect of monoglyceride on the LC of the system is that the system with more additions of monoglycerides forms more dense network structures and binds more V_C,the biggest encapusulation efficiency and LC were 72.407±1.204% and 2.123±0.145 mg/g respectively.the concentration of V_C and gel temperature have a dual effect on LC.Low concentration can increase its LC,but high concentration(more than 10 mg/m L)makes the reaction more difficult,and excess V_C will deposit.Appropriate temperature makes the reaction more complete,due to V_C is sensitive to heat,it will lose biological activity or thermally decompose when the temperature higher than 80 ? and reduce the LC of the system eventually.About the system of oil binding capacity(OBC),the system network density affected by monoglyceride dosage and crystallization temperature caused the system of OBC.In general,oleogels system which have more monoglyceride addition,suitable crystallization temperature(0 ?)for ?' and ? type growth has a higher OBC,and the system based on low viscosity oil which has highly unsaturated oil has a higher OBC too due to poor mobility.In the evaluation of oxidative stability of the system,the three-dimensional network structure of the no-load oleogels can't prevent the primary oxidation but can inhibit the occurrence of chain transfer in the secondary oxidation.The oleogels loaded with V_C has good stability in the whole oxidation process.Thirdly,the performances of oleogel-based margarine with commercial products were compared..Through texture characteristic,solid fat content,crystallographic analysis,determination of unsaturated fatty acids and trans fatty acids of all samples,it's confirmed that oleogel-based margarine had similar properties to commercial margarines such as low SFC value,wide plastic range,and main crystal form ??.But its some properties are superior to the commercial magarines sunch as higher unsaturated fatty acid content,better smear performance and the lowest trans fatty acid content.(1.119±0.033%),which meets the nation regulations(<3%).In this paper,we studied the basic physical properties of loaded V_C oleogels,loading capacity,storage period stability and final consumer survey and the comparison of commercial products,which can provide method reference and theoretical support to the further study of oleogel and it's application.