{"title":"以paramam酰胺酯为原料的熔融纺丝纤维的制造、表征和结构分析","authors":"Hongyi Gan, T. Kabe, T. Iwata","doi":"10.2115/fiberst.2020-0018","DOIUrl":null,"url":null,"abstract":": Paramylon̶a β -1,3-glucan photoproduced by Euglena ̶is a promising raw material for bio-based plastics. Three kinds of paramylon ester derivatives̶paramylon propionate (PaPr), paramylon butyrate (PaBu), and paramylon valerate (PaVa)̶were synthesized to manufacture melt-spun fibers. The melt processing temperatures were determined by combining differential scanning calorimetry (DSC) and a melt flow test. The molecular orientation, crystallinity, and tensile properties of the melt-spun fibers were investigated using a polarized optical microscope (POM), wide-angle X-ray diffraction (WAXD), and tensile testing, respectively. The POM revealed that the PaPr molecular chains were aligned along the spinning direction, despite variation in the take-up rate. However, WAXD confirmed that crystallization only occurred in PaPr fibers spun at a higher take-up rate of over 108 m/min, suggesting that crystallization is induced by high shearing force. This phenomenon seems to be due to the rigid mainchain structure consisting of pyranose rings. With further annealing of the PaPr fibers, the tensile strength increased with an increase in crystallinity. These tendencies were also observed in the PaBu and PaVa melt-spun fibers. The melt-spun fibers of paramylon ester derivatives were manufactured from powders without any additives.","PeriodicalId":54299,"journal":{"name":"Journal of Fiber Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.3000,"publicationDate":"2020-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":"{\"title\":\"Manufacture, Characterization, and Structure Analysis of Melt-Spun Fibers Derived from Paramylon Esters\",\"authors\":\"Hongyi Gan, T. Kabe, T. Iwata\",\"doi\":\"10.2115/fiberst.2020-0018\",\"DOIUrl\":null,\"url\":null,\"abstract\":\": Paramylon̶a β -1,3-glucan photoproduced by Euglena ̶is a promising raw material for bio-based plastics. Three kinds of paramylon ester derivatives̶paramylon propionate (PaPr), paramylon butyrate (PaBu), and paramylon valerate (PaVa)̶were synthesized to manufacture melt-spun fibers. The melt processing temperatures were determined by combining differential scanning calorimetry (DSC) and a melt flow test. The molecular orientation, crystallinity, and tensile properties of the melt-spun fibers were investigated using a polarized optical microscope (POM), wide-angle X-ray diffraction (WAXD), and tensile testing, respectively. The POM revealed that the PaPr molecular chains were aligned along the spinning direction, despite variation in the take-up rate. However, WAXD confirmed that crystallization only occurred in PaPr fibers spun at a higher take-up rate of over 108 m/min, suggesting that crystallization is induced by high shearing force. This phenomenon seems to be due to the rigid mainchain structure consisting of pyranose rings. With further annealing of the PaPr fibers, the tensile strength increased with an increase in crystallinity. These tendencies were also observed in the PaBu and PaVa melt-spun fibers. The melt-spun fibers of paramylon ester derivatives were manufactured from powders without any additives.\",\"PeriodicalId\":54299,\"journal\":{\"name\":\"Journal of Fiber Science and Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.3000,\"publicationDate\":\"2020-05-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Fiber Science and Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.2115/fiberst.2020-0018\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, TEXTILES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Fiber Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.2115/fiberst.2020-0018","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, TEXTILES","Score":null,"Total":0}
引用次数: 6
摘要
:由绿藻光产生的Paramylon - a β -1,3-葡聚糖是一种很有前途的生物基塑料原料。合成了三种酰胺酯衍生物——丙酸酰胺(PaPr)、丁酸酰胺(pab)和戊酸酰胺(PaVa)——用于制备熔融纺丝纤维。采用差示扫描量热法(DSC)和熔体流动试验相结合的方法确定了熔体加工温度。利用偏光显微镜(POM)、广角x射线衍射(WAXD)和拉伸测试分别研究了熔融纺丝纤维的分子取向、结晶度和拉伸性能。POM显示,尽管吸收率不同,但PaPr分子链沿自旋方向排列。然而,WAXD证实,结晶只发生在吸收率高于108 m/min的PaPr纤维中,这表明结晶是由高剪切力引起的。这种现象似乎是由于由吡喃糖环组成的刚性主链结构所致。进一步退火后,纤维的抗拉强度随着结晶度的增加而增加。在PaBu和PaVa熔纺纤维中也观察到这些趋势。以不添加任何添加剂的粉末为原料制备了酰胺酯衍生物的熔融纺丝纤维。
Manufacture, Characterization, and Structure Analysis of Melt-Spun Fibers Derived from Paramylon Esters
: Paramylon̶a β -1,3-glucan photoproduced by Euglena ̶is a promising raw material for bio-based plastics. Three kinds of paramylon ester derivatives̶paramylon propionate (PaPr), paramylon butyrate (PaBu), and paramylon valerate (PaVa)̶were synthesized to manufacture melt-spun fibers. The melt processing temperatures were determined by combining differential scanning calorimetry (DSC) and a melt flow test. The molecular orientation, crystallinity, and tensile properties of the melt-spun fibers were investigated using a polarized optical microscope (POM), wide-angle X-ray diffraction (WAXD), and tensile testing, respectively. The POM revealed that the PaPr molecular chains were aligned along the spinning direction, despite variation in the take-up rate. However, WAXD confirmed that crystallization only occurred in PaPr fibers spun at a higher take-up rate of over 108 m/min, suggesting that crystallization is induced by high shearing force. This phenomenon seems to be due to the rigid mainchain structure consisting of pyranose rings. With further annealing of the PaPr fibers, the tensile strength increased with an increase in crystallinity. These tendencies were also observed in the PaBu and PaVa melt-spun fibers. The melt-spun fibers of paramylon ester derivatives were manufactured from powders without any additives.