Cov tswm ciab, cov cuab yeej teeb niaj hnub, tsuas yog ua los ntawm paraffin, hauv lub sijhawm thaum ub, feem ntau yog ua los ntawm tsiaj roj. Tuaj yeem hlawv kom tshem tawm lub teeb. Tsis tas li ntawd, tswm ciab yog siv rau ntau hom phiaj: hauv Hnub Yug: hauv Hnub Yug, kev cai dab qhuas, thiab cov kab tshoob kev lom zem thiab muaj kev lom zem. Hauv cov ntawv sau thiab kev ua haujlwm ua haujlwm, tswm ciab muaj cov cim qhia ntawm lub ntsiab lus ntawm kev fij thiab mob siab.
Hauv cov sij hawm niaj hnub no, feem ntau yog ntseeg tias tswm ciab los ntawm teeb ntawm lub sijhawm thaum qub. Cov neeg qub painted rog los yog ciab rau cov tawv ntoo lossis ntoo cov chips thiab khi lawv ua ke los ua teeb pom kev. Nws tseem tau hais tias nyob rau lub sijhawm ua ntej thiab txheej thaum ub, qee tus neeg khi Mugwort thiab Reed rau hauv ib pawg, thiab tom qab ntawd rho nws hauv qee cov roj thiab taws nws rau teeb pom kev zoo. Tom qab ntawd, ib tug neeg muab qhwv rau ntawm daim ntaub nrog daim ntaub thiab tau sau nws nrog beeswax kom zes nws.
Cov khoom siv tseem ceeb ntawm cov tswm ciab yog paraffin (c₂₅h₅₂), uas yog tsim los ntawm cov roj av tom qab xovxwm txias lossis cov kuab tshuaj txias. Nws yog sib xyaw ntawm ob peb qib alkanes, feem ntau yog n-dodecane (C22H46) thiab N-Dioctadecane (C28h555), muaj txog 85% cov pa roj carbon thiab 14% hydrogen. Cov khoom siv roj ntxiv ntxiv muaj roj dawb, cov kua qaub ua kom zoo nkauj, thiab lwm yam. Yooj yim rau yaj, ntom tsawg dua li dej nyuaj soluble hauv dej. Tshav kub yaj rau hauv cov kua, tsis muaj pob tshab thiab me ntsis cua sov volatile, tuaj yeem hnov cov ntxhiab tsw ntxhiab tsw ntxhiab tsw. Thaum txias, nws yog dawb khoom, nrog tus ntxhiab tsw me me.
Lub tswm ciab hlawv peb pom tsis yog kev sib txuas ntawm cov ntaus paraffin, tab sis cov cua sov tso tawm ua rau cov pa paraffin, uas yog cov nplaim taws. Thaum lub tswm ciab yog zes, thawj nplaim taws yog me dua thiab maj loj dua. Cov nplaim hluav taws tau muab faib ua peb txheej (cov nplaim hluav taws uas sab nraud (nplaim taws sab hauv, nplaim taws). Cov nplaim taws tseem ceeb yog cov pa taws nrog qhov ntsuas kub tsawg tshaj plaws; Lub nplaim puab sab hauv parsaffin tsis tau hlawv tag nrho, qhov kub yog siab dua lub nplaim taws, thiab muaj cov pa roj carbon artle; Cov nplaim taws sab nraud tiv thaiv cov huab cua nrog huab cua, thiab cov nplaim taws yog qhov ci ntsa iab, tag nrho kub hnyiab, thiab kub siab tshaj. Yog li ntawd, thaum ib tug phim stick tau nrawm nroos rau hauv cov nplaim hluav taws thiab muab tshem tawm tom qab txog 1 thib ob, cov match lo kov cov nplaim hluav taws. Lub sijhawm ntawm lub tshuab tawm ntawm lub tswm ciab, koj tuaj yeem pom ib qho kev txawj ntse dawb, tuaj yeem ua pov thawj tias cov pa luam yeeb dawb, yog li nws tuaj yeem ua pov thawj cov pa luam yeeb dawb vapor. Thaum lub tswm ciab hlawv, cov khoom ntawm kev hlawv yog roj carbon dioxide thiab dej. Tshuaj Nploj Qhia: C25h552 + O2 (Lit) CE2 + H2O. Cov kab mob hlawv hauv cov pa hluav taws yog cov nplaim hluav taws dawb lub teeb, tso cua sov, thiab dej ua rau ntawm lub raj mis.
Shijiazhuang Zhongya tswm ciab Hoobkas -shijiazhuang Zhongya tswm ciab tswm, .ltd.
Lub sij hawm Post: Lub Yim Hli 04-2023