Fundamental Research on Polymer Complex using Chitosan

本研究的目的是利用一种新的合成方法，将地球上利用率低的生物质甲壳素或壳聚糖转化为具有良好力学性能的复合聚合物材料。程序如下：将壳聚糖溶于丙烯酸单体水溶液中，加入引发剂，经紫外光固化制备高分子复合物，通过壳聚糖在不同浓度丙烯酸单体水溶液中的溶解性试验，已知壳聚糖可以溶解于水性丙烯酸单体中，达到合成聚合物固体含量的20%。水溶液中加入水溶性引发剂，然后进行紫外光辐射聚合。聚合物复合物的形态从硬到软、从软到粘、从高到低、从高到低都有不同的性质和形态。在水中的最大溶胀度为20，为了降低表观交联密度，使用来自有限脱乙酰甲壳素的壳聚糖可以更大。从拉曼光谱中可以看出，随着壳聚糖含量的增加，羰基吸收峰向高波数方向移动，表明壳聚糖与聚丙烯酸之间存在较强的相互作用。溶胀膜中羰基的拉曼光谱向高波数方向移动并变得尖锐，说明溶胀过程中氢键被切断; DSC热分析表明，聚丙烯酸的玻璃化转变温度随着壳聚糖含量的增加而升高，说明聚丙烯酸与壳聚糖之间具有良好的相容性。

The purpose of this work is to convert chitin or chitosan, which are low-utilizable biomass on the earth, into composite polymeric materials having satisfactory mechanical properties using a new synthetic method. The procedure is as follows ; dissolving chitosan into aqueous acrylic acid monomer, adding initiator, then UV curing to prepare polymer complex.From the solubility test of chitosan into various concentration of aqueous aclyric acid monomer, it was known that chitosan can be dissolved into aqueous aclyric acid monomerupto 20% of solid content of synthesized polymer.The above various concentrations of chitosan/acrylic acid monomer/water solution were polymerized by adding water soluble initiator and then UV radiation. It was known that various properties and forms of polymer complex can be produced, of which forms were from hard to soft and tacky, of which swelling were high to low. The maximum swelling in water was 20, which can be greater using chitosan from limited deacetylated chitin in order to lower apparent cross linking density. From raman spectroscopy, the absorbance derived from carbonyl groups shifted higher wave number with the increase of chitosan, which indicated strong interaction between chitosan and polyacrylic acid. The raman spectra of carbonyl for swollen films with water was shifted higher wave number and became sharp, which indicated the hydrogen bond was cut whtn swelled.From DSC thermography, the glass transition temperature of polyacrylic acid became higher with the increase of chitosan, which indicated good compatibility between polyacrylic acid and chitosan.