Fibrillated-film polymeric binders from aliphatic polyamides

Kuperman, S. I.; D'yakonova, E.B.; Shubina, T. G.; Nachinkin, O. I.

doi:10.1007/bf00543380

Cited by 2 publications

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“…피브리드를 이용한 페이퍼는 높은 화학적, 생물학적, 열적 저항 특성을 가지며, 내후성, 탄성, 마모저항성을 지니고 있으며, 뛰어난 전기 절연체이다 [5]. 제조방법은 건식법과 습식법으로 분류되며, 그 중 습식 법은 고분자의 상분리, 표면에서의 중축합, 침전조에서 유 체역학적 현상에 의한 고분자의 침전을 이용하는 방법이 사용된다 [6].…”

Section: 서 론unclassified

“…제조방법은 건식법과 습식법으로 분류되며, 그 중 습식 법은 고분자의 상분리, 표면에서의 중축합, 침전조에서 유 체역학적 현상에 의한 고분자의 침전을 이용하는 방법이 사용된다 [6]. 피브리드의 형성은 충격의 작용에 의한 파동 과정(wave process)과 액체들의 합류에 의한 확산과정에 의 해 이루어지며, 고분자의 유동성과 파열 패턴은 계면장력, 고분자의 점도, 고분자와 침전제의 속도비에 의존한다 [5]. 고분자의 점도와 응고욕의 용매특성에 따른 용매-비용매 시스템에서 용매의 확산 속도에 의한 특성은 이전 연구의 용매-비용매 시스템에 의해 제조된 피브리드를 통해 알 수 있다.…”

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Preparation and Morphological Characteristics of m-Aramid Fibrid Using a Non-solvent of Ethanol

Baek¹,

Kim²,

Chung³

2014

Textile Science and Engineering

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Fibrids are materials of a complex fibrous, film-like, or intermediate form. The diameter of the particles varies between 20-50 µm, and 100-10,000 µm. The optimal form and size of the particles depends in each case on the area of application. The fibrid form is the result of two processes, viz. a wave process and diffusion. The life span and break-up pattern of the polymer depend on the interphase surface tension, the viscosity of the polymer, and the diffusion speed ratio of the polymer and medium. In this study, m-aramid was polymerized at low temperature and in solution with an equal molar ratio of MPD and IPC in DMAc. The meta-aramid solution was prepared by dissolution in DMAc, and ethanol was used as a coagulation bath. The rotation speed was the main factor affecting the formation and morphology of the fibrid. Meta-aramid paper was produced from m-aramid fiber with meta-aramid fibrid by wet laying. The results showed that fibrid particle sizes decreased with increasing rotation speeds and decreasing concentrations of m-aramid in the solution. The properties of the m-aramid fibrid as a function of the processing conditions were investigated using an image analyzer, optical microscopy, and SEM. The resulting meta-aramid paper was analyzed in terms of its morphology, thickness, air permeability, and mechanical properties.

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Section: 서 론unclassified

Preparation and Morphological Characteristics of m-Aramid Fibrid Using a Non-solvent of Ethanol

Baek¹,

Kim²,

Chung³

2014

Textile Science and Engineering

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Shear‐precipitated chitosan powders, fibrids, and fibrid papers: Observations on their formation and characterization

Salmon

Hudson

1995

J Polym Sci B Polym Phys

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Chitosan powders and fibrids were prepared by shear precipitation of dissolved chitosan in a coagulating solution of sodium hydroxide. Following neutralization by washing and an alcohol dehydration step, the white to off‐white powders were fine and free flowing. The dried fibrids had a highly oriented, ribbon‐like shape that in bulk gave a lofty appearance and soft hand. Chitosan fibrids were readily converted to sheet structures by typical paper‐making procedures. The resulting chitosan papers were either smooth, flexible, and largely translucent when pressed dry from the moist mat, or were soft and opaque white when the moist mat was soaked in alcohol before drying. X‐ray diffraction, SEM, and optical microscopy were used to characterize the different chitosan powders, fibrids, and papers. Chitosan fibrid papers were found to have tensile properties comparable to that of cellulosic papers, though the wet strength and water sorption of chitosan fibrid papers was higher than that of the cellulose controls. ©1995 John Wiley & Sons, Inc.

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Fibrillated-film polymeric binders from aliphatic polyamides

Cited by 2 publications

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Preparation and Morphological Characteristics of m-Aramid Fibrid Using a Non-solvent of Ethanol

Preparation and Morphological Characteristics of m-Aramid Fibrid Using a Non-solvent of Ethanol

Shear‐precipitated chitosan powders, fibrids, and fibrid papers: Observations on their formation and characterization

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