二硫化钼负载聚六亚甲基胍盐酸盐抗菌水性聚氨酯的制备与性能

Preparation and properties of molybdenum disulfide loaded polyhexamethylenehydrazine hydrochlorideantibacterial waterborne polyurethane

摘要:

以聚己二酸-1,4-丁二醇酯二醇(PBA)、异佛尔酮二异氰酸酯(IPDI)、2,2-二羟甲基丙酸(DMPA)为主要原料，单宁酸剥离纳米二硫化钼水溶液(TA-MoS2水溶液)为改性剂制备出TA-MoS2改性的水性聚氨酯(TMPU)，再将TMPU胶膜浸泡在含量为2%(以水的质量为基准，下同)的聚六亚甲基胍盐酸盐(PHMG)水溶液中，制备出MoS2负载PHMG抗菌水性聚氨酯(P-TMPU)。通过DLS、SEM、AFM测试得出TA成功剥离MoS2，且分散性良好；通过FTIR、TG、SEM、接触角等方法对TMPU乳液进行了分析和表征。结果表明，添加60mL TA-MoS2水溶液改性后的胶膜失重30%时的热分解温度(T30%)和失重50%时的热分解温度(T50%)分别为324.9和354.9℃，水接触角为91.1°；相比于未添加TA-MoS2水溶液改性胶膜的T30%和T50%分别提高了6.4和11.4℃，水接触角提高27.9°；通过对P-TMPU胶膜进行抗菌测试表明，经含量为2%的PHMG水溶液浸泡后的胶膜对大肠杆菌和金葡萄球菌的抗菌率均达到99%以上，可以广泛应用于纺织、皮革、家具等领域。

Abstract:

TA-MoS2 modified waterborne polyurethane (TMPU) was prepared by using polyadipate-1,4-butanediol ester diol (PBA), isophorone diisocyanate (IPDI), 2,2-dimethylpropionic acid (DMPA) as the main raw material and tannic acid stripped nano-molybdenum disulfide aqueous solution (TA-MoS2 aqueous solution) as the modifier. Then, MoS2 loaded PHMG antibacterial waterborne polyurethane (P-TMPU) was prepared by immerging TMPU film in 2% (based on the mass of water, the same below) polyhmethylene guanidine hydrochloride (PHMG) aqueous solution. The results of DLS, SEM and AFM showed that TA successfully stripped MoS2 with good dispersion. The TMPU emulsions were analyzed and characterized by FTIR, TG, SEM, contact angle and other methods. The results showed that the thermal decomposition temperature at 30% weight loss (T30%) and thermal decomposition temperature at 50% weight loss (T50%) of the film modified by adding 60mL TA-MoS2 aqueous solution were 324.9 and 354.9, respectively, and the water contact angle was 91.1℃. Compared with the unmodified film without TA-MoS2 aqueous solution, the T30% and T50% increased by 6.4℃ and 11.4℃, respectively, and the water contact angle increased by 27.9℃. The antibacterial test of P-TMPU film showed that the antibacterial rate of the film soaked in 2% PHMG aqueous solution to Escherichia coli and Staphylococcus aureus reach more than 99%, and it could be widely used in textile, leather, furniture and other fields.