Polyester/silk Fibroin High Functional Composite Fabric Research

Polyester fabric is widely used in textile and industry because of its outstanding wearability and mechanical properties. However, as there are only two alcoholic hydroxyl groups in the end of each molecule chain, the hygroscopicity and antistatic property of polyester fabric are poor, which lower its comfort level as clothes. On the other side, protein has excellent moisture content, biocompatibility and hygienical property.In this dissertation, polyester fabric was semi-inlaid with sucrose ester(SE) under high temperature and pressure and was grafted with sericin protein(SP), silk fibroin(SF) and silkworm pupa protein(SPP), respectively, by self-synthesized cross-linking agent sucrose ester glycidyl ether(SEGE) which has softening function. The high functional PET/Protein fabrics were produced with better hydrophilicity, antistatic property and biocompatibility. The process of polyester semi-inlaid with SE and grafting with protein, the extraction process of SP, SF, SPP and the synthesis of SEGE had been studied. The characteristic and wearability of PET/Protein fabric were also tested. The effects of semi-inlay and grafting were confirmed by SEM and FTIR. The crystallinity and thermal stability of modified polyester had been analyzed by XRD and DSC or DTG. Washing fastness, hydrophilicity, antistatic property, cockle elasticity and flexibility had been tested. And polyester with high flexural rigidity was softened by amino silicon oil. The results showed:(1) Semi-inlay technology could endow polyester a large amount of hydroxyl which solved the bottleneck that there was no reactive group on the surface of polyester. Semi-inlay technology is suitable for mass production as the craft is effective and relatively simple and the facility requirements are reachable. The optimal technological parameters of semi-inlay technology were SE concentration1%, bath ratio1:30, temperature130℃, time60min. The semi-inlaid polyester exhibited favorable washing fastness and thermal stability, improved hydrophilicity and antistatic property. The degree of crystallinity, cockle elasticity and flexibility decreased a little.(2) The function of self-made cross-linking agent-SEGE was effective. Protein could be grafted on the surface of polyester under cure with high grafting fastness and SEGE has softening function. The technological parameters of grafting were bath ratio1:30, cure temperature110℃, time30min. (3) The extraction process of sericin protein were boiling for30min, temperature130℃, bath ratio1:50. The degree of crystallinity of PET/SP fabric increased2.8%, and the thermal stability also increased a little. As the increase of SP grafting rate, the hygroscopicity and capillary effect increased, the contact angle, decreased and the antistatic property was improved. The cockle elasticity and flexibility of PET/SP fabric decreased and mellowing treatment was applied.(4) The extraction process of silk fibroin were NaOH concentration6%, bath ratio1:50, temperature100℃, time30min. The degree of crystallinity of PET/SF fabric increased3.1%, thermal property remained stable. As the increase of SF grafting rate, the moisture region increased; the antistatic property had been improved; cockle elasticity decreased and flexural rigidity increased a little but still in a suitable region.(5) The extraction process of silkworm pupa protein were NaOH concentration10%, reaction time30min, temperature80℃, bath ratio1:30. The degree of crystallinity of PET/SPP fabric increased1.2%, thermal stability increased a little. As the increase of SPP grafting rate, the hygroscopicity increased and hydrophilicity was improved; the antistatic property was also improved; cockle elastic decreased, flexural rigidity increased and softening treatment was applied.(6) Mellowing effect of amino silicon oil was effective. PET/protein fabric with favorable flexibility was achieved. The optimal technological parameters of softening treatment were:amino silicon oil concentration20g/L, bath ratio1:30, soaking and rolling twice respectively, rolling remaining rate70-75%, curing temperature170℃, time30s.