幹gan煙yan葉ye是shi由you複fu雜za有you機ji物wu質zhi組zu成cheng的de多duo孔kong毛mao細xi管guan膠jiao體ti體ti係xi。根gen據ju水shui分fen與yu葉ye內nei物wu質zhi之zhi間jian的de結jie合he形xing式shi，一yi般ban將jiang幹gan煙yan葉ye中zhong的de水shui分fen分fen為wei自zi由you水shui和he結jie合he水shui兩liang類lei。但dan也ye有you劃hua分fen為wei三san類lei的de觀guan點dian，如ruП.A.列賓查爾曾經根據膠體毛細管多孔物料中水分的各種結合形式以及水分同物料的結合能，把物料中水分的結合形式分為化學結合、物wu理li化hua學xue結jie合he和he物wu理li機ji械xie結jie合he等deng。化hua學xue結jie合he水shui同tong物wu料liao有you準zhun確que的de數shu量liang關guan係xi，結jie合he相xiang當dang牢lao固gu
，一yi般ban幹gan燥zao時shi不bu能neng脫tuo除chu
，隻zhi有you在zai化hua學xue作zuo用yong或huo特te別bie強qiang的de熱re處chu理li（如煆燒）下(xia)才(cai)能(neng)脫(tuo)除(chu)掉(diao)。理(li)化(hua)結(jie)合(he)水(shui)無(wu)嚴(yan)密(mi)的(de)數(shu)量(liang)關(guan)係(xi)，又(you)分(fen)為(wei)吸(xi)附(fu)結(jie)合(he)水(shui)和(he)滲(shen)透(tou)壓(ya)保(bao)持(chi)水(shui)兩(liang)種(zhong)結(jie)合(he)形(xing)式(shi)。吸(xi)附(fu)結(jie)合(he)水(shui)是(shi)被(bei)膠(jiao)囊(nang)外(wai)表(biao)麵(mian)和(he)內(nei)表(biao)麵(mian)上(shang)的(de)力(li)場(chang)所(suo)束(shu)縛(fu)的(de)，膠(jiao)囊(nang)具(ju)有(you)結(jie)合(he)層(ceng)，有(you)時(shi)是(shi)具(ju)有(you)雙(shuang)離(li)子(zi)層(ceng)的(de)膠(jiao)體(ti)微(wei)粒(li)，粒(li)子(zi)層(ceng)的(de)結(jie)構(gou)決(jue)定(ding)了(le)膠(jiao)囊(nang)的(de)電(dian)荷(he)。因(yin)為(wei)膠(jiao)體(ti)係(xi)統(tong)的(de)微(wei)粒(li)的(de)相(xiang)對(dui)半(ban)徑(jing)較(jiao)小(xiao)（0.1～0.001μm）

，分fen散san度du很hen大da，所suo以yi膠jiao體ti有you巨ju大da的de內nei表biao麵mian，因yin而er有you極ji大da的de表biao麵mian自zi由you能neng，靠kao這zhe種zhong表biao麵mian自zi由you能neng產chan生sheng了le水shui的de吸xi附fu結jie合he。要yao脫tuo除chu物wu體ti中zhong與yu膠jiao囊nang結jie合he得de較jiao強qiang的de吸xi附fu結jie合he水shui，必bi須xu消xiao耗hao更geng多duo的de能neng量liang。物wu理li機ji械xie結jie合he水shui是shi濕shi物wu料liao內nei不bu定ding量liang的de結jie合he水shui，包bao括kuo大da毛mao細xi管guan水shui和he微wei毛mao細xi管guan水shui，前qian者zhe能neng自zi由you流liu動dong
，後hou者zhe則ze受shou強qiang大da的de毛mao細xi管guan引yin力li作zuo用yong而er難nan以yi脫tuo出chu。充chong滿man在zai濕shi物wu料liao的de大da毛mao細xi管guan水shui分fen，可ke以yi液ye體ti形xing式shi被bei排pai到dao體ti外wai，但dan小xiao毛mao細xi管guan水shui往wang往wang需xu要yao汽qi化hua以yi後hou才cai能neng排pai出chu。濕shi物wu料liao幹gan燥zao過guo程cheng中zhong產chan生sheng的de收shou縮suo
，主zhu要yao就jiu是shi毛mao細xi管guan失shi水shui變bian形xing的de結jie果guo。煙yan葉ye脫tuo水shui到dao一yi定ding程cheng度du
，屬shu於yu一yi種zhong膠jiao體ti毛mao細xi管guan多duo孔kong濕shi物wu料liao
，其qi水shui分fen狀zhuang態tai也ye可ke以yi按an此ci劃hua分fen。

 

　　shuifenbujinshiyanyexibaoshengminghuodongbukequeshaodezhongyaowuzhi，yeshiyeneixuduohuaxuebianhuadezhongyaojiezhi。jishizaiyanyexibaosiwangyihou，tarengjiangcanyuyeneidehuaxueguocheng。yinci，zaiduishuifenjinxinglechongfenliyongyihou，bixujishidijiangqijiangdidaoanquanfanwei
，bingyangekongzhiwailaishuifendeqinru。fouze
，guoduodeshuifenhuijiangdiyanyedepinzhi，shenzhishiyanyesangshiyijinghuodedekeyongxing。