国产日产欧美精品-亚洲国产综合久久精品-色综合色国产热无码一-亚洲欧美日本国产,免费观看一区二区三区_在线观看片A免费不卡观看_亚洲а∨天堂久久精品_99久无码中文字幕一本久道

產(chǎn)品展廳收藏該商鋪

您好 登錄 注冊

當前位置:
美國布魯克海文儀器公司>技術(shù)文章>測量應用案例-20210902

技術(shù)文章

測量應用案例-20210902

閱讀:146          發(fā)布時間:2021-9-23
 

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(guān)鍵詞:cellulose nanocrystals; phenolic esters; p-hydroxycinnamate esters; click-chemistry; nanocomposites; polyvinyl alcohol

收藏該商鋪

登錄 后再收藏

提示

您的留言已提交成功!我們將在第一時間回復您~

對比框

產(chǎn)品對比 產(chǎn)品對比 聯(lián)系電話 二維碼 意見反饋 在線交流

掃一掃訪問手機商鋪
010-62081908
在線留言
封开县| 皮山县| 讷河市| 康保县| 邵东县| 普兰县| 宣恩县| 通河县| 钟山县| 柯坪县| 阿尔山市| 南召县| 乌鲁木齐县| 黄大仙区| 永登县| 桓仁| 浦江县| 江口县| 仙游县| 成都市| 古蔺县| 灵丘县| 新密市| 甘南县| 天津市| 海林市| 德格县| 莆田市| 苏尼特左旗| 甘肃省| 建湖县| 珠海市| 密云县| 青岛市| 上杭县| 株洲市| 任丘市| 红安县| 平舆县| 安陆市| 岳阳县|