Preparation and Properties of PET/PAAS/Activated Carbon Composites with Low VOC Content

doi:10.19491/j.issn.1001-9278.2020.06.013

Abstract

Abstract:

In this study, the PET/PAAS/activated carbon composites were prepared by a mechanical blending method, and their thermal properties, crystal structure and VOC content were investigated by means of differential scanning calorimetry, X?ray diffraction and high?performance liquid chromatography. The results indicated that the addition of activated carbon improved the crystallinity of the composites but reduced their VOC content. The melting point of the composites was found to increase at first and then tend to decrease with an increase of activated carbon content. The composites achieved the maximum melting point and breaking strength at the activated carbon contents of 0.75 and 0.25 wt%, respectively. When 1.25 wt% of activated carbon was incorporated, the composites exhibited a formaldehyde removal rate of 97.54 %, a acetaldehyde removal rate of 92.1 %, and a acetone removal rate of 80.2 %.

Key words: poly(ethylene terephthalate), volatile organic compound, activated carbon, composite

CLC Number:

TQ323.4⁺1

Xiang YU, Ruyang LI, Jingwen ZHAI, Huanhuan TAN. Preparation and Properties of PET/PAAS/Activated Carbon Composites with Low VOC Content[J]. China Plastics, 2020, 34(6): 80-86.

Figures/Tables 14

编号	PET含量/份	PAAS含量/份	活性炭含量*/份
1^#	100	0	0
2^#	97	3	0
3^#	97	3	0.25
4^#	97	3	0.50
5^#	97	3	0.75
6^#	97	3	1.00
7^#	97	3	1.25

Tab.1. Mass ratio of PET/PAAS/activated carbon composites

Fig.1. General reaction formula of aldehydes and ketones and DNPH

Fig.2. Heating and cooling curves of PET/PAAS composites

Fig.3. Heating and cooling DSC curves of PET/PAAS/activated carbon composites with different amounts of activated carbon

活性炭添加量/%	T_m/℃	ΔH_m/J·g^?1	X_c/%	T₀/℃	T_c/℃
0	257.16	50.04	45.71	226.94	219.30
0.25	256.21	49.84	47.29	227.42	219.39
0.50	256.04	48.43	48.55	227.94	220.40
0.75	255.92	52.21	51.50	226.58	218.93
1.00	256.41	49.12	49.83	225.78	217.24
1.25	256.84	50.67	48.19	225.18	216.25

Tab.2. Thermodynamic data of heating and cooling of PET/PAAS/activated carbon composites

Fig.4. Melting points of PET/PAAS/activated carbon composites with different amounts of activated carbon

Fig.5. Crystallinity of PET/PAAS/activated carbon composites with different amounts of activated carbon

Fig.6. Initial crystallization temperature and crystallization temperature of PET/PAAS/activated carbon composites with different amounts of activated carbon

Fig.7. Stress?strain curves of PET/PAAS/activated carbon composites with different amounts of activated carbon

活性炭添加量/%	初始模量/MPa
0	1 145
0.25	1 695
0.50	1 671
0.75	1 403
1.00	1 357
1.25	1 583

Tab.3. Initial modulus of PET/PAAS/activated carbon composites

Fig.8. Effect of different activated carbon content on breaking strength and elongation at break of PET/PAAS/activated carbon composites

Fig. 9. XRD diffraction curves of PET/PAAS/activated carbon composites with different amounts of activated carbon

Fig.10. HPLC chromatogram of APET/PAAS/activated carbon composites without activated carbon

活性炭添加量/%	甲醛		乙醛		丙酮
活性炭添加量/%	峰面积之比	含量/μg·g^-1	峰面积之比	含量/μg·g^-1	峰面积之比	含量/μg·g^-1
0	2.402 5	2.285	0.947 3	1.321	0.315 8	0.581
0.25	1.554 9	1.479	0.735 2	1.025	0.273 6	0.503
0.50	1.052 8	1.001	0.462 4	0.645	0.201 6	0.371
0.75	0.823 6	0.783	0.367 8	0.513	0.143 5	0.264
1.00	0.647 8	0.616	0.213 5	0.298	0.104 1	0.191
1.25	0.135 4	0.128	0.075 4	0.105	0.062 4	0.115

Tab.4. VOC content of APET/PAAS/activated carbon composites

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