Abstract:
The invention generally relates to a method for producing a polymer-fibre composite comprising animal fibres, and use of the polymer-fibre composite as or in forming a feedstock for plastics manufacture. The composite is formed by rapidly heating animal fibres and one or more thermoplastic polymers and compressing, cooling and optionally mechanically processing to produce pellets, shards or powder. The animal fibres in the composite are substantially evenly dispersed throughout a matrix formed by the thermoplastic polymer(s) and the polymer-fibre. The composite has desirable properties for plastics manufacture including good processability in conventional machinery, low density, and improved tensile strength and tensile modulus.
Abstract:
The present invention relates to methacryloyl-gelatin and acryloyl-gelatin with low pyrogenic activity, in particular with low lipopolysaccharide content. The (meth)acryloyl-gelatin is further characterized by low (meth)acrylic acid content. The invention further relates to methods for preparing said (meth)acryloyl-gelatin, which do not require a dialysis step. The invention further relates to hydrogels comprising this (meth)acryloyl-gelatin, as well as uses thereof for tissue- engineering applications, and as bio-ink or bio-resin.
Abstract:
L'invention concerne un procédé de préparation d'une poudre d'un matériau d'origine naturelle, qui comprend une étape de traitement d'une matière contenant au moins 70 % en poids de déchet(s) de cuir sous forme particulaire dans une extrudeuse bi-vis dans laquelle il est appliqué un profil de température croissant depuis une température initiale comprise entre 10 et 40 °C jusqu'à une température maximale comprise entre 60 et 120 °C, en présence d'eau dans une quantité telle que le rapport en poids d'eau par rapport à ladite matière est compris entre 0,20 et 6.
Abstract:
The present invention relates to a gelatin having improved properties, in particular improved dispensing properties, more particularly improved printing properties. The present invention further relates to a construct produced with the gelatin of the present invention and to a process to produce said construct. Further the present invention relates to the use of the gelatin of the present invention to solve existing problems encountered with dispensing systems, in particular with 3D printing and more particularly for applications in the medical field. The gelatin of the present invention is particularly suitable for bio-printing in the medical field and may also be used in cosmetic and in food applications.
Abstract:
The invention is related to production of high-bloom grade gelatin from the poultry tissues (chicken, turkey, duck, goose). The goal of the invention is to develop an environment friendly process ensuring low operating cost to manufacture colorless, odourless, high grade gelatin (over 100 bloom) in line with islamic requirements from the poultry tissues.
Abstract:
Method of preparing a keratin-based biomaterial is provided. The method comprises a) reacting keratin with a polymer having at least one of an amine and carboxylic functional group in the presence of a carbodiimide cross-linking agent to form a cross-linked keratin-polymer material; and b) freeze drying the cross-linked keratin-polymer material to form the keratin-based biomaterial. A keratin-based biomaterial thus prepared is also provided.
Abstract:
본 발명은 도파민・H+X- 함유 수용액(여기서, H+X-는 산임)에 염기(base)를 첨가하여 산 염기 중화반응시키는 단계; 및 도파민을 공기 중에서 산화시키면서 중합(polymerization)시키는 단계를 동시 또는 연속적으로 수행하여 멜라닌을 형성하되, 상기 염기 첨가시 도파민・H+X-(a)과 염기(b)의 몰비를 a : b = 1 : 0.1 ~ 1로 조절하여 나노 크기의 멜라닌 입자를 형성시키는 것이 특징인 멜라닌 입자 제조 방법, 및 나노 크기의 멜라닌 입자를 제공한다. 본 발명에 따른 제조방법은 단시간 내에 나노 크기의 멜라닌 입자를 제조할 수 있다. 나아가, 본 발명에 따라 제조된 나노 크기의 멜라닌 입자는 천연 멜라닌 또는 종래 합성 멜라닌과 달리 용매 내 분산성이 우수하여 다양한 분야에 응용될 수 있다.
Abstract:
A kind of multiply modified derivatives of gelatin having not only the structure of formula (I) but also one of structures of formula (II), (III), and (IV) as well. In the formulas, G refers to gelatin residue comprising A type, B type and the type of gene restructuring; R1 refers to alkylene, or a linkage group with amide; R2 refers to alkyl, or aryl; R3 refers to alkylene; R4 refers to carboxyl or carboxylate. The multiple modifying ways of gelatin comprise the modifying way of hydrophobic activating the amide of branch amine group of gelatin, the modifying way of carboxylating the amide of branch amine group of gelatin, the modifying way of thiolating the branch carboxyl group of gelatin, and the modifying way of thiolating the modified product of carboxylating the amide of branch amine group of gelatin. The multiply modified derivatives of gelatin have versatile chemical structures and multi-functions. The multiply modified derivatives of gelatin linked with crosslinking agent can provide crosslinked gelatin material. The crosslinked gelatin material can be used for matrix of bacterial growth.
Abstract:
Предлагаемое решение относится к технологии получения органополимерных ретикулярных поропластов, которые могут применяться для производства. Коллагеновый ретикулярный поропласт имеет направленную структуру. Способ получения коллагенового ретикулярного поропласта направленной структуры, характеризуется следующими признаками: в качестве исходной используется система, состоящая, по крайней мере, из двух компонентов, один из которых представляет собой воду, а второй растворенный в ней коллаген; охлаждение исходной системы до температуры перехода в твердое агрегатное состояние так, чтобы формирующиеся при этом кристаллы были ориентированы преимущественно в одном направлении; выдерживание отвержденной системы, в течение времени, необходимого для образования полимерной гелеобразной макрофазы; удаление воды.