CAJ | 학술논문

利用羰基二咪唑(CDI)的高活性活化纳米纤维素(NCC)，使NCC表面带有高反应活性的碳碳双键。再以2-溴异丁酸乙酯为引发剂，铜丝为催化剂，制备出低分子量的聚丙烯酸甲酯(PMA)。然后采用活性自由基聚合将PMA接枝到活化的NCC表面，制备出PMA接枝改性的NCC。采用凝胶渗透色谱测定合成的PMA的分子量及分子量分布；通过傅立叶变换红外光谱及X射线衍射分析等测试方法对改性前后的NCC的结构和性能进行了分析。实验结果表明，通过单电子转移活性自由基聚合法合成的PMA分子量为2000，分子量分布窄(分布指数为1.14)，并且其成功接枝到NCC表面。
이용탄기이미서(CDI)적고활성활화납미섬유소(NCC)，사NCC표면대유고반응활성적탄탄쌍건。재이2-추이정산을지위인발제，동사위최화제，제비출저분자량적취병희산갑지(PMA)。연후채용활성자유기취합장PMA접지도활화적NCC표면，제비출PMA접지개성적NCC。채용응효삼투색보측정합성적PMA적분자량급분자량분포；통과부립협변환홍외광보급X사선연사분석등측시방법대개성전후적NCC적결구화성능진행료분석。실험결과표명，통과단전자전이활성자유기취합법합성적PMA분자량위2000，분자량분포착(분포지수위1.14)，병차기성공접지도NCC표면。
Nano-crystalline cellulose(NCC) was activated by CDI to make NCC surface covered with high active double bonds.---Poly(methyl acrylate)(PMA) with low molecular weight was synthesized by using EBiB as a initiator,Cu as a catalyst. Then PMA was grafted onto the surface of activated NCC,and modified NCC was obtained. The molecular weight and its distribution of PMA were measured by GPC;FTIR and XRD were used to characterize the structure and properties of NCC and modified NCC. The results show that the molecular weight of PMA is 2 000 with the distribution being 1.14,and PMA is grafted to the surface of NCC successfully.