三级片视频播放,精品三级片在线观看,A级性爱视频,欧美+日韩+国产+无码+小说,亲子伦XX XX熟女,秋霞最新午夜伦伦A片黑狐,韩国理伦片漂亮的保拇,一边吃奶一边做边爱完整版,欧美放荡性护士videos

產品推薦:氣相|液相|光譜|質譜|電化學|元素分析|水分測定儀|樣品前處理|試驗機|培養箱


化工儀器網>技術中心>其他文章>正文

歡迎聯系我

有什么可以幫您? 在線咨詢

測量應用案例-20210902

來源:美國布魯克海文儀器公司   2021年09月23日 16:29  
 

文獻名:Phenolic Ester-Decorated Cellulose Nanocrystals as UV-Absorbing Nanoreinforcements in Polyvinyl Alcohol Films

 

 

作者 

David Joram Mendoza, Christine Browne, Vikram Singh Raghuwanshi, Louis M. M. Mouterde, George P. Simon, Florent Allais, and Gil Garnier

Bioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical Engineering, Monash University, 15 Alliance Lane (Building 59), Clayton, Victoria 3800, Australia

URD Agro-Biotechnologies Industrielles (ABI), CEBB, AgroParisTech, Pomacle 51110, France

 

摘要:Grafting novel and nature-inspired phenolic esters onto cellulose nanocrystals (CNCs) provides nanofibers with excellent protection against UV radiation when incorporated into a polymer matrix. In this work, CNCs decorated with a novel UV-absorbing phenolic diester (CNC-diethyl ferulate or CNC-DEF) obtained via a click-type copper-catalyzed azide/alkyne cycloaddition reaction were incorporated into a polyvinyl alcohol (PVA) matrix to produce transparent films with excellent photostability and UV-absorbing properties. PVA films filled with 20 wt % CNC-DEF exhibited complete UV protection (0% transmittance) and high transparency in the visible region (70–90% transmittance). In contrast, PVA films loaded with the pristine CNCs do not show any UV-shielding properties. Importantly, the grafting of DEF moieties on CNCs significantly aids the dispersion of the phenolic diester in the aqueous PVA matrix, which was not achieved with DEF blended with PVA. Mechanical tests also show that the addition of 20 wt % CNC-DEF in PVA increases the tensile strength and modulus by 91 and 150%, respectively, relative to neat PVA. The oxygen barrier properties of the composite film also improve with CNC-DEF addition. This study shows the great potential of the phenolic-ester-decorated CNCs as dispersible, multifunctional UV-absorbing nanoreinforcements in PVA films for industrial and packaging applications.

 

關鍵詞:cellulose nanocrystals; phenolic esters; p-hydroxycinnamate esters; click-chemistry; nanocomposites; polyvinyl alcohol

免責聲明

  • 凡本網注明“來源:化工儀器網”的所有作品,均為浙江興旺寶明通網絡有限公司-化工儀器網合法擁有版權或有權使用的作品,未經本網授權不得轉載、摘編或利用其它方式使用上述作品。已經本網授權使用作品的,應在授權范圍內使用,并注明“來源:化工儀器網”。違反上述聲明者,本網將追究其相關法律責任。
  • 本網轉載并注明自其他來源(非化工儀器網)的作品,目的在于傳遞更多信息,并不代表本網贊同其觀點和對其真實性負責,不承擔此類作品侵權行為的直接責任及連帶責任。其他媒體、網站或個人從本網轉載時,必須保留本網注明的作品第一來源,并自負版權等法律責任。
  • 如涉及作品內容、版權等問題,請在作品發表之日起一周內與本網聯系,否則視為放棄相關權利。
企業未開通此功能
詳詢客服 : 0571-87858618
主站蜘蛛池模板: 宾川县| 扶余县| 兰州市| 顺义区| 福安市| 灌阳县| 桂阳县| 华亭县| 沁源县| 石家庄市| 界首市| 桃源县| 景泰县| 漳浦县| 通辽市| 陆川县| 阜新| 偃师市| 噶尔县| 循化| 时尚| 台山市| 民勤县| 昆明市| 内江市| 临桂县| 乐亭县| 西安市| 潮州市| 肥东县| 高台县| 邢台市| 平阴县| 宣汉县| 遵化市| 东方市| 灵台县| 绥滨县| 名山县| 化隆| 深州市|