PET/PP Blend with Bamboo Charcoal to Produce Functional Composites: Evaluation of Functionalities

Abstract

Poly(ethylene terephthalate)/polypropylene/bamboo charcoal (PET/PP/BC) thermoplastic composites were prepared by melt compounding and then injection molding. The functionalities of the composites, such as electrical resistivity, electromagnetic shielding effectiveness (EMSE), far-infrared ray radiativity (FIRR) and negative ion concentration, were evaluated in the study. The surface resistivity and volume resistivity of the functional composites were 2.47 - 9.12×1011 Ω/sq and 5.8 - 7.01×1010 Ωcm, respectively, while composites containing 6 wt% BC or above. The EMSE of the composites were below 10 dB at frequency ranged from 300 kHz to3 GHz. The average FIRR of the composites was 0.85 at BC concentration of 8 wt%. Incorporation of BC into the composites increased the negative ion concentration of about 30 pcs/cc compared to those without BC. However, it is lower than the positive ion concentration in the air.

Evaluation of the manufacture of sound absorbent sandwich plank made of PET/TPU honeycomb grid/PU foam

“…Though the rumbles caused by the industrial manufacture bring the times to the higher civilization and industrialization, they also jeopardize the workmen's hearing, cause occupational diseases and spoil the tranquility of the citizens. 1 Industrial textile is also one of the major goals in the application for the current textile industry; [2][3][4][5][6][7][8][9][10][11] a technology to control noise is necessary. At present, most technologies applied in noise control are related to passive noise control, which can be divided into improving the mechanical structure around the noise source or placing the absorption materials and bafflers around the machine so as to change or block the noise transmission path and decrease the noise amount.…”

The Preparation and Characterization of Tourmaline-Containing Functional Copolymer p (VST/MMA/BA)

“…For p (VST/MMA/BA) copolymer, the far-infrared emissivity values were all high (about 0.96) and remained more or less the same regardless of the amount of VST in the copolymer. The results are much better than 0.85 for poly(ethylene terephthalate)/polypropylene/bamboo charcoal (PET/PP/BC) thermoplastic composites [27] and better than 0.9 for paperboards coated with 40 g/m 2 far-infrared emission functional materials [30]. In contrast, the farinfrared emissivity of tourmaline/graphene oxide (at tourmaline/graphene oxide ratio of 85 : 15) showed merely an enhancement of 4% in far-infrared emission than that of tourmaline alone [31].…”

“…These results were in accordance with the good dispersivity of modified tourmaline. With a bamboo charcoal content of 12%, poly(ethylene terephthalate)/polypropylene/ bamboo charcoal (PET/PP/BC) thermoplastic composites could only produce negative air ions of 110-200 per cm 3 [27]. The average negative air ion releasing was about 150 per cm 3 for ethylene propylene diene terpolymer/polypropylene and tourmaline composite films [28].…”

Medical effects of poly-ethylene terephthalate (PET) non-woven fabrics treated with bamboo activated charcoal

“…Bamboo activated charcoal was bound on the surface of non-woven fabrics using resin to impart an ability of releasing far infrared ray to the fabrics and to enhance the heat retention ability of the fabrics. These properties will improve the blood circulation of the human body and enhance metabolism, thereby helping to prevent diseases Lin et al, 2008). Based on the experimental results shown in Table 5, before exposure to a halogen lamp, the surface temperature of fabrics was between 24.0 to 24.57°C, and after exposure, the temperatures of fabrics treated with 2.5, 5, 10 and 20 g/L bamboo activated charcoal were 28.…”