含能材料
含能材料
함능재료
ENERGETIC MATERIALS
2014年
1期
26-30
,共5页
高分子材料学%硝化棉( NC)气凝胶%纳米结构%热分解
高分子材料學%硝化棉( NC)氣凝膠%納米結構%熱分解
고분자재료학%초화면( NC)기응효%납미결구%열분해
polymer-science%nitrocellulose( NC)aerogel%nano-structure%thermal decomposition
为研究硝化棉（ NC）气凝胶的微结构及其与热性能的关系，用溶胶-凝胶法以及超临界干燥法制备了硝化棉气凝胶。用扫描电子显微镜（ SEM）、X射线衍射（ XRD）、热重-红外联用（ TG-FTIR）表征了其微观结构、结晶性及热性能。结果表明：NC 气凝胶的微观结构为纳米颗粒堆积成的纳米多孔结构。其结晶遭到破坏，呈非晶无序特征。与 NC 相比，NC 气凝胶的 DTG 峰温及 DSC放热峰温度分别提前7℃和11℃，分解热由1429．87 J·g-1提高至1689．21 J·g-1。
為研究硝化棉（ NC）氣凝膠的微結構及其與熱性能的關繫，用溶膠-凝膠法以及超臨界榦燥法製備瞭硝化棉氣凝膠。用掃描電子顯微鏡（ SEM）、X射線衍射（ XRD）、熱重-紅外聯用（ TG-FTIR）錶徵瞭其微觀結構、結晶性及熱性能。結果錶明：NC 氣凝膠的微觀結構為納米顆粒堆積成的納米多孔結構。其結晶遭到破壞，呈非晶無序特徵。與 NC 相比，NC 氣凝膠的 DTG 峰溫及 DSC放熱峰溫度分彆提前7℃和11℃，分解熱由1429．87 J·g-1提高至1689．21 J·g-1。
위연구초화면（ NC）기응효적미결구급기여열성능적관계，용용효-응효법이급초림계간조법제비료초화면기응효。용소묘전자현미경（ SEM）、X사선연사（ XRD）、열중-홍외련용（ TG-FTIR）표정료기미관결구、결정성급열성능。결과표명：NC 기응효적미관결구위납미과립퇴적성적납미다공결구。기결정조도파배，정비정무서특정。여 NC 상비，NC 기응효적 DTG 봉온급 DSC방열봉온도분별제전7℃화11℃，분해열유1429．87 J·g-1제고지1689．21 J·g-1。
To study the microstructure of nitrocellulose( NC)aerogel and its relationship with thermal properties,NC aerogel was prepared by sol-gel method and supercritical drying. The microstructure,crystallizability and thermal properties of the aerogel were characterized by SEM,XRD and TG/DSC-FTIR methods. Results show that:the microstructure of NC aerogel is nano-porous structure accumulated by nano-particles. The crystallization of NC is destroyed in NC aerogel,presenting amorphous disordered state. In comparison with NC,the DTG peak temperature and DSC exothermic peak temperature of NC aerogel shift 7 ℃ and 12 ℃ downwards,respectively,and the decomposition heat increases from 1429.87 J·g-1 to 1689.21 J·g-1.
