Preparation and Sizing Performance of the Modified Collagen Surface Sizing Agent
Using collagen as the raw material,methyl acrylate and vinyl acetate as the soft and hard monomers,ammonium persulfate as the initiator,a surface sizing agent was prepared by the emulsion polymerization method to modified the collagen.The optimum prepared conditions were got by the single factor experiment,follow as m(soft monomer)/m(hard monomer) for 1∶2 or 1∶1,m(collagen)/m(monomer) for 1∶2,the dosage of initiator for 0.8% of monomers amount,the reaction time for 2h.The FT-IR showed that the grafting reaction between vinyl monomers and collagen happened and the vinyl monomers reacted completely.The particle size distribution of the emulsion indicated that its size distribution was uniform and the average size was 0.117μm.The results of application experiments showed that the tensile strength and tearing strength of paper were stronger than that of base paper for 3 times and 1.9 times,after sizing by using the emulsion.The water-resistance of paper was also improved.The gel properties of collagen solution determines its superior adhesivity.Collagen can be used as the adhesive and surface sizing agent.Because the bonding strength between collagen and fiber is stong1,the dosage of collagen as paper sizing agent is few.The film property of collagen is better than that of starch.So,there is no need to add any filmogen in the sizing liquid.In addition,collagen itself is a double functional group surfactant and has the self-emulsifying function.There is also no need to add emulsifier in the process of preparing sizing agent.This not only avoids the negative effects of emulsifier to performance of the sizing agent,but also reduces the cost of preparation.While the wet and water resistance of collagen are poor.The sizing effect is not very good for the collagen alone as sizing agent.The functional groups in the side chain of collagen such as-COOH,-NH2 and-OH react easily with vinyl monomers by the graft copolymerization pattern.The modification method can improve greatly the anti-bending,water resistance and other comprehensive physical and chemical properties of collagen membrane2,3.Based on the above all,a surface sizing agent was prepared by the emulsion polymerization method to modified the collagen,using the collagen as the raw material,methyl acrylate and vinyl acetate as the soft and hard monomers,ammonium persulfate as the initiator.Its sizing performance was also studied.
collagen graft modification sizing agent preparation sizing performance
WANG Xue Chuan HAO Xiao Li QIANG Tao Tao
Shaanxi University of Science and Technology, Key Laboratory of Chemistry and Technology for Light Chemical Industry, Ministry of Education, Xian, Shaanxi, China
国际会议
香港
英文
367-371
2012-12-11（万方平台首次上网日期，不代表论文的发表时间）