XPS study of PBO fiber surface modified by incorporation of hydroxyl polar groups in main chains

Zhang, Tao; Hu, Daning; Li, Guang; Yang, Shengrong; Li, Guang; Jiang, Jianming

doi:10.1016/j.apsusc.2009.09.050

Cited by 24 publications

(12 citation statements)

References 13 publications

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“…According to the data in Table , the contact angle of the fibre surface did not change significantly after the pretreatment. PPA made the fibre surface become uneven, but the PBO macromolecule remained essentially unionised , and the hydrophobic properties of the fibre surface were unchanged. This feature is favourable for PBO dyeing with disperse dyes.…”

Section: Resultsmentioning

confidence: 99%

“…Poly( p ‐phenylene benzobisoxazole) (PBO) fibre is known to possess the highest modulus and tensile strength among all commercial synthetic polymer fibres. It can be used as reinforcement in advanced composites and has great potential applications in the fields of aerospace, military and general industries . The excellent mechanical properties as well as good thermal and chemical stability stem from the structure of PBO fibre, with rigid chains in the chemical units, a high level of crystallinity and a high degree of chain orientation along the fibre axis .…”

Section: Introductionmentioning

confidence: 99%

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Pretreating poly(p‐phenylene benzobisoxazole) fibre with polyphosphoric acid and dyeing with disperse dyes

Guan

Mao

Kong

et al. 2013

Coloration Technology

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In recent years, many advanced composite materials based on poly(p‐phenylene‐2,6‐benzobisoxazole) fibres have become prominent in applications requiring high‐strength and flame‐retardance such as body armour, industrial reinforcement materials and military camouflage. However, the application of these fibres used as protective clothing is limited due to difficulties in dyeing and printing. In the present work, a process for pretreating poly(p‐phenylene benzobisoxazole) fibre with polyphosphoric acid was applied, and the pretreated fibre was then dyed with disperse dyes via dip dyeing. Effects of pretreatment temperature and time on structure and properties were investigated. Surface morphology, crystallinity, chemical structure and degree of orientation of fibres were characterised. The results indicated that the supramolecular structure of the fibre was relaxed or swelled by polyphosphoric acid in the pretreatment process, so that the dyeability of poly(p‐phenylene benzobisoxazole) fibre was improved, with satisfactory dye exhaustion, K/S values and dyeing fastness. Also, with the appropriate pretreatment process, the swelling effect of polyphosphoric acid on the structure of poly(p‐phenylene benzobisoxazole) fibre was limited, so as to control the decrease in tensile strength and limiting oxygen index of the dyed fibre.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pretreating poly(p‐phenylene benzobisoxazole) fibre with polyphosphoric acid and dyeing with disperse dyes

Guan

Mao

Kong

et al. 2013

Coloration Technology

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show abstract

“…FT-IR showed two types of surface hydroxyl group from absorbed water and crystal water. XPS showed crystal water on the surface of the catalyst after vacuum treatment of the catalyst and XPS instrument [48]. The correlation between the density of -OH groups and k obs in Fig.…”

Section: Role Of Surface Properties In Catalytic Ozonationmentioning

confidence: 93%

Cobalt modified red mud catalytic ozonation for the degradation of bezafibrate in water: Catalyst surface properties characterization and reaction mechanism

Zhang

et al. 2016

Chemical Engineering Journal

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“…It can be used as reinforcement in advanced composites and has great potential applications in aerospace, the military and general industry [1][2][3]. The excellent mechanical and thermal properties and the chemical stability stem from the structure of PBO fiber, i.e., the rigid chain in the structural unit, a high level of crystallinity and a high degree of chain orientation along the fiber axis [4,5].…”

Section: Introductionmentioning

confidence: 99%

New disperse dyeing method of poly(p-phenylene benzobisoxazole) fiber pretreated with polyphosphoric acid

Mao

Guan

Zhu

2015

Korean J. Chem. Eng.

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Poly(p-phenylene benzobisoxazole) fiber is considered as a high-performance fiber because of its high strength and excellent thermal and chemical stability. It has been used in industrial reinforcement, body armor and military camouflage. But the application of poly(p-phenylene benzobisoxazole) fiber used for protective clothing is limited because it is difficult to dye with conventional dyeing processes. In this work, a carrier dyeing method with disperse dyes was first used to dye the fiber after a pretreatment with polyphosphoric acid. The effects of the carrier structure and dyeing conditions on the color strength of dyed samples were investigated. In addition, the crystallinity and orientation degree of the poly(p-phenylene benzobisoxazole) fibers before and after pretreatment with phthalimide and benzyl benzoate were measured by X-ray diffraction and velocity-oriented test, respectively. The results suggested phthalimide and benzyl benzoate, as carrier, could effectively promote disperse dyeing of the PBO fiber pretreated with polyphosphoric acid. Meanwhile, the optimal conditions for the carrier dyeing were obtained, that is, concentration of carrier 4%, dyeing temperature 150 o C and time 120 min. By way of the carrier dyeing, the K/S value of dyed sample and the percentage of dye exhaustion were greatly improved, while the crystalline structure and orientation degree of the pretreated samples hardly changed. Furthermore, the decreases of the tensile strength and the limiting oxygen index of dyed poly(p-phenylene benzobisoxazole) sample were very little, and the color fastness was also satisfactory.

show abstract

XPS study of PBO fiber surface modified by incorporation of hydroxyl polar groups in main chains

Cited by 24 publications

References 13 publications

Pretreating poly(p‐phenylene benzobisoxazole) fibre with polyphosphoric acid and dyeing with disperse dyes

Pretreating poly(p‐phenylene benzobisoxazole) fibre with polyphosphoric acid and dyeing with disperse dyes

Cobalt modified red mud catalytic ozonation for the degradation of bezafibrate in water: Catalyst surface properties characterization and reaction mechanism

New disperse dyeing method of poly(p-phenylene benzobisoxazole) fiber pretreated with polyphosphoric acid

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