Preparation and surface properties of cashmere guard hair powders

Kiran Patil; Rangam Rajkhowa; Xiujuan J. Dai; Takuya Tsuzuki; Tong Lin; Xungai Wang

doi:10.1016/j.powtec.2011.12.038

Preparation and surface properties of cashmere guard hair powders

Kiran Patil, Rangam Rajkhowa, Xiujuan J. Dai, Takuya Tsuzuki, Tong Lin, Xungai Wang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Cashmere guard hair, a by-product from the cashmere dehairing industry is used for low value applications because the guard hairs are not suitable for spinning as they are coarse, contain large medullation and lack crimp or curvature. To find new uses in high value-added applications, cashmere guard hairs were milled into fine particles using the processing sequence Chopping → Attritor milling → Spray Drying → Air Jet milling. The guard hairs were partially hydrolysed with hydrochloric acid which increased the pulverisation rate due to the deterioration in mechanical properties. The volume median particle size d(0.5) was reduced from 2.328 μm, for untreated cashmere guard hair powder to 0.461 μm for powder from the acid hydrolysed guard hairs. FTIR and XPS studies revealed the breakdown of the cashmere guard hair cuticle cells and the exposure of the cortex on the powder surface along with the oxidation of the cashmere guard hair during milling.

Original language	English
Pages (from-to)	179-185
Number of pages	7
Journal	Powder Technology
Volume	219
DOIs	https://doi.org/10.1016/j.powtec.2011.12.038
Publication status	Published - Mar 2012
Externally published	Yes

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10.1016/j.powtec.2011.12.038

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title = "Preparation and surface properties of cashmere guard hair powders",

abstract = "Cashmere guard hair, a by-product from the cashmere dehairing industry is used for low value applications because the guard hairs are not suitable for spinning as they are coarse, contain large medullation and lack crimp or curvature. To find new uses in high value-added applications, cashmere guard hairs were milled into fine particles using the processing sequence Chopping → Attritor milling → Spray Drying → Air Jet milling. The guard hairs were partially hydrolysed with hydrochloric acid which increased the pulverisation rate due to the deterioration in mechanical properties. The volume median particle size d(0.5) was reduced from 2.328 μm, for untreated cashmere guard hair powder to 0.461 μm for powder from the acid hydrolysed guard hairs. FTIR and XPS studies revealed the breakdown of the cashmere guard hair cuticle cells and the exposure of the cortex on the powder surface along with the oxidation of the cashmere guard hair during milling.",

keywords = "Air jet milling, Cashmere guard hair, Partial acid hydrolysis, Pulverisation rate, Wet attritor milling",

author = "Kiran Patil and Rangam Rajkhowa and Dai, {Xiujuan J.} and Takuya Tsuzuki and Tong Lin and Xungai Wang",

year = "2012",

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doi = "10.1016/j.powtec.2011.12.038",

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journal = "Powder Technology",

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AU - Patil, Kiran

AU - Rajkhowa, Rangam

AU - Dai, Xiujuan J.

AU - Tsuzuki, Takuya

AU - Lin, Tong

AU - Wang, Xungai

PY - 2012/3

Y1 - 2012/3

N2 - Cashmere guard hair, a by-product from the cashmere dehairing industry is used for low value applications because the guard hairs are not suitable for spinning as they are coarse, contain large medullation and lack crimp or curvature. To find new uses in high value-added applications, cashmere guard hairs were milled into fine particles using the processing sequence Chopping → Attritor milling → Spray Drying → Air Jet milling. The guard hairs were partially hydrolysed with hydrochloric acid which increased the pulverisation rate due to the deterioration in mechanical properties. The volume median particle size d(0.5) was reduced from 2.328 μm, for untreated cashmere guard hair powder to 0.461 μm for powder from the acid hydrolysed guard hairs. FTIR and XPS studies revealed the breakdown of the cashmere guard hair cuticle cells and the exposure of the cortex on the powder surface along with the oxidation of the cashmere guard hair during milling.

AB - Cashmere guard hair, a by-product from the cashmere dehairing industry is used for low value applications because the guard hairs are not suitable for spinning as they are coarse, contain large medullation and lack crimp or curvature. To find new uses in high value-added applications, cashmere guard hairs were milled into fine particles using the processing sequence Chopping → Attritor milling → Spray Drying → Air Jet milling. The guard hairs were partially hydrolysed with hydrochloric acid which increased the pulverisation rate due to the deterioration in mechanical properties. The volume median particle size d(0.5) was reduced from 2.328 μm, for untreated cashmere guard hair powder to 0.461 μm for powder from the acid hydrolysed guard hairs. FTIR and XPS studies revealed the breakdown of the cashmere guard hair cuticle cells and the exposure of the cortex on the powder surface along with the oxidation of the cashmere guard hair during milling.

KW - Air jet milling

KW - Cashmere guard hair

KW - Partial acid hydrolysis

KW - Pulverisation rate

KW - Wet attritor milling

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SP - 179

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JO - Powder Technology

JF - Powder Technology

ER -

Preparation and surface properties of cashmere guard hair powders

Abstract

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