銅系導電膠粘劑

銅(tong)(tong)(tong)的(de)(de)電(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)與銀(yin)(yin)附近，價(jia)格低廉(lian)，是一(yi)種(zhong)相(xiang)對(dui)抱負的(de)(de)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)填(tian)料(liao)。但銅(tong)(tong)(tong)在(zai)(zai)(zai)空氣中易(yi)被(bei)(bei)氧(yang)(yang)化(hua)(hua)，在(zai)(zai)(zai)銅(tong)(tong)(tong)粉(fen)(fen)(fen)外表易(yi)構成一(yi)層氧(yang)(yang)化(hua)(hua)膜，然后影響銅(tong)(tong)(tong)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)膠(jiao)(jiao)(jiao)(jiao)粘(zhan)(zhan)劑(ji)的(de)(de)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)性(xing)(xing)(xing)。因(yin)而，運用(yong)銅(tong)(tong)(tong)粉(fen)(fen)(fen)制(zhi)(zhi)造導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)膠(jiao)(jiao)(jiao)(jiao)粘(zhan)(zhan)劑(ji)時，應(ying)對(dui)銅(tong)(tong)(tong)粉(fen)(fen)(fen)進行預處(chu)(chu)置(zhi)或(huo)在(zai)(zai)(zai)制(zhi)(zhi)造過程中參(can)加相(xiang)應(ying)的(de)(de)助劑(ji)，以(yi)(yi)除掉外表氧(yang)(yang)化(hua)(hua)層，進步其導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)性(xing)(xing)(xing)。劉運學等(deng)(deng)(deng)以(yi)(yi)環氧(yang)(yang)樹脂E-51為(wei)(wei)(wei)基體，二乙烯三胺(an)為(wei)(wei)(wei)固化(hua)(hua)劑(ji)，選用(yong)硅(gui)烷偶(ou)(ou)聯(lian)劑(ji)KH550對(dui)銅(tong)(tong)(tong)粉(fen)(fen)(fen)進行改(gai)性(xing)(xing)(xing)處(chu)(chu)置(zhi)，并以(yi)(yi)改(gai)性(xing)(xing)(xing)后的(de)(de)銅(tong)(tong)(tong)粉(fen)(fen)(fen)作為(wei)(wei)(wei)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)填(tian)料(liao)，在(zai)(zai)(zai)填(tian)充(chong)質量(liang)(liang)分數(shu)為(wei)(wei)(wei)65%時制(zhi)(zhi)備出電(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)為(wei)(wei)(wei)1.5×10–3Ω·cm，剪切(qie)(qie)強(qiang)度(du)(du)大于20MPa的(de)(de)銅(tong)(tong)(tong)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)膠(jiao)(jiao)(jiao)(jiao)粘(zhan)(zhan)劑(ji)，經室溫(wen)1000h老化(hua)(hua)實驗(yan)后該導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)膠(jiao)(jiao)(jiao)(jiao)粘(zhan)(zhan)劑(ji)的(de)(de)電(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)和剪切(qie)(qie)強(qiang)度(du)(du)改(gai)變均(jun)小于20%，其粘(zhan)(zhan)接功用(yong)、導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)功用(yong)和耐老化(hua)(hua)功用(yong)均(jun)滿意運用(yong)要求;張(zhang)博等(deng)(deng)(deng)用(yong)硅(gui)烷偶(ou)(ou)聯(lian)劑(ji)對(dui)納米和微米球形銅(tong)(tong)(tong)粉(fen)(fen)(fen)進行外表改(gai)性(xing)(xing)(xing)，在(zai)(zai)(zai)銅(tong)(tong)(tong)粉(fen)(fen)(fen)填(tian)充(chong)質量(liang)(liang)分數(shu)為(wei)(wei)(wei)65%時，研(yan)宣布(bu)了(le)電(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)為(wei)(wei)(wei)3.6×10–4Ω·cm，剪切(qie)(qie)強(qiang)度(du)(du)為(wei)(wei)(wei)17.6MPa的(de)(de)銅(tong)(tong)(tong)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)膠(jiao)(jiao)(jiao)(jiao)粘(zhan)(zhan)劑(ji)，該導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)膠(jiao)(jiao)(jiao)(jiao)粘(zhan)(zhan)劑(ji)具(ju)有優秀的(de)(de)耐熱性(xing)(xing)(xing)和穩定(ding)性(xing)(xing)(xing)，在(zai)(zai)(zai)溫(wen)度(du)(du)為(wei)(wei)(wei)85℃，相(xiang)對(dui)濕(shi)度(du)(du)為(wei)(wei)(wei)85%RH的(de)(de)環境(jing)下通過1000h老化(hua)(hua)測驗(yan)后，電(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)和剪切(qie)(qie)強(qiang)度(du)(du)的(de)(de)改(gai)變均(jun)不超越10%。為(wei)(wei)(wei)了(le)處(chu)(chu)置(zhi)銅(tong)(tong)(tong)粉(fen)(fen)(fen)在(zai)(zai)(zai)空氣中易(yi)被(bei)(bei)氧(yang)(yang)化(hua)(hua)這(zhe)個難(nan)題，能夠在(zai)(zai)(zai)銅(tong)(tong)(tong)粉(fen)(fen)(fen)外表進行鍍銀(yin)(yin)。這(zhe)樣(yang)不只能克服銅(tong)(tong)(tong)粉(fen)(fen)(fen)易(yi)被(bei)(bei)氧(yang)(yang)化(hua)(hua)的(de)(de)缺點，一(yi)起(qi)還(huan)能夠進步銅(tong)(tong)(tong)粉(fen)(fen)(fen)的(de)(de)電(dian)(dian)(dian)(dian)導(dao)(dao)(dao)率(lv)。杜亮亮等(deng)(deng)(deng)選用(yong)雙酚A型環氧(yang)(yang)樹脂為(wei)(wei)(wei)基體，銀(yin)(yin)包銅(tong)(tong)(tong)粉(fen)(fen)(fen)為(wei)(wei)(wei)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)填(tian)料(liao)，在(zai)(zai)(zai)填(tian)充(chong)質量(liang)(liang)分數(shu)僅(jin)為(wei)(wei)(wei)55%時，制(zhi)(zhi)備出了(le)電(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)為(wei)(wei)(wei)8.9×10–4Ω·cm的(de)(de)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)膠(jiao)(jiao)(jiao)(jiao)粘(zhan)(zhan)劑(ji)。Zhang等(deng)(deng)(deng)運用(yong)片狀鍍銀(yin)(yin)銅(tong)(tong)(tong)粉(fen)(fen)(fen)研(yan)發得到電(dian)(dian)(dian)(dian)阻(zu)(zu)率(lv)為(wei)(wei)(wei)2.4×10–4Ω·cm的(de)(de)各向同性(xing)(xing)(xing)導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)膠(jiao)(jiao)(jiao)(jiao)粘(zhan)(zhan)劑(ji)，在(zai)(zai)(zai)相(xiang)對(dui)濕(shi)度(du)(du)為(wei)(wei)(wei)85%RH，溫(wen)度(du)(du)為(wei)(wei)(wei)85~225℃時，回流1000h后，該導(dao)(dao)(dao)電(dian)(dian)(dian)(dian)膠(jiao)(jiao)(jiao)(jiao)粘(zhan)(zhan)劑(ji)仍具(ju)有極好的(de)(de)穩定(ding)性(xing)(xing)(xing)，這(zhe)表明該鍍銀(yin)(yin)銅(tong)(tong)(tong)粉(fen)(fen)(fen)具(ju)有杰(jie)出的(de)(de)抗(kang)氧(yang)(yang)化(hua)(hua)性(xing)(xing)(xing)。