Mabapi le mochini oa extrusion

Lintlha tse tšeletseng tse khahlisang! Litelu tsa calcium carbonate li na le monyetla o motle oa ho li etsa
Aboutmochini oa extrusion:
Calcium carbonate e tloaelehile, empa litelu tsa calcium carbonate ke eng?

Litelu ke likhoele tse khutšoanyane tse hlahang ka tlhaho kapa tse entsoeng ka maiketsetso tse nang le sebopeho se le seng sa kristale, tse nyane haholo ka bophara ka tatellano ea boholo (li-micron), li na le karolelano e kholo ea likarolo 'me ka kakaretso li nkoa e le thepa ea kristale ea tekanyo e le' ngoe.

Ho se ho entsoe mashala a makholo, ho kenyeletsoa le mashala a mangata a tšepe a kang nickel le tšepe, mashala a oxide a kang MgO le ZnO, mashala a letsopa a kang SiC, mashala a boride a kang TiB2 le ZrB2, le mashala a mang a mangata a sa pheleng le a tlhaho.

Mashala a calcium carbonate ke thepa ea kristale e le 'ngoe ea maiketsetso, mokhoa oa lik'hemik'hale ke CaCO3, boima ba limolek'hule ke 100.09, eo CaO le CO2 li neng li etsa 56.03%, 43.97%, ntlha ea eona ea ho qhibiliha ke 759 ℃, boima ke 2.86g/cm3. Mashala a calcium carbonate hangata ke phofo e tšoeu e hlephileng, ka har'a microscope ea elektrone e hlahlojoang ho na le likristale tse kang nale kapa tse nang le likhoele, bolelele ba 20-60μm, bophara bo bokhutšoanyane ba 0.5-1.0μm, karolelano ea bolelele le bophara ba 20-30, ke ea karolo ea aragonite.

Litšobotsi tsa litelu tsa calcium carbonate li betere ho feta tsa thepa e 'ngoe mabapi le bosoeu, ho hanyetsa mocheso le ho hanyetsa ho tsofala, kahoo li na le menyetla e metle ea ho sebelisoa masimong a mangata.

Tšebeliso ea polasetiki

Litelu tsa calcium carbonate li na le karo-karolelano e kholo ea likarolo le boholo bo bonyenyane ba kristale, hoo e batlang e se na li-dislocation tsa ka hare, meeli ea lijo-thollo le liphoso tse ling kristale e akaretsang, thepa ea mechini e haufi le kristale e sa senyehang, kahoo e tla eketsoa phello ea ho matlafatsa polasetiki e totobetse haholo, e ka ntlafatsa matla ka katleho, modulus ea elastic le thepa e meng ea mechini.

Liteko li bontšitse hore bakeng sa polyethylene, thepa ea mechini ea litelu tse tletseng calcium carbonate e betere ho feta ea talc e tletseng, faeba ea khalase le calcium carbonate e tloaelehileng e bobebe. Litelu tse tloaelehileng tsa calcium carbonate li na le tšusumetso e kholo ea matla ho polyethylene 'me li na le tšusumetso e nyane holim'a boreleli ba bokaholimo ba sehlahisoa ha li bapisoa le faeba ea khalase.

Ha litelu tsa calcium carbonate li nkeloa sebaka ke likhoele tsa khalase tse ka har'a thepa ea nylon, sehlahisoa se hlahisoang se na le qetello e betere ea bokaholimo 'me motsoako o ka sebelisoa ho hlahiseng lihlahisoa tsa polasetiki tse nepahetseng.

Ho phaella moo, ho fapana le disebediswa tse ding, sebopeho sa ditedu tsa calcium carbonate se fumaneha ka bongata tlhahong mme se boetse se ajwa haholo. Calcium carbonate e ka boela ya arabela ka dikhemikhale le di-acid tse matla ho hlahisa carbon dioxide le matswai a sa pheleng. Haeba mmele o hema calcium carbonate e nyane, e tla bola ka lebaka la karabelo ya tlhaho ya mmele mme e ke ke ya baka kotsi. Ka hona, tshebediso ya ditedu tsa calcium carbonate e le thepa e matlafatsang bakeng sa dipolasetiki tse bolang ha e bake tshilafatso ya bobedi tikolohong ya tlhaho mme e ka fokotsa tshilafatso e tshweu mme ya sireletsa tikoloho ka katleho.

Dikopo ka rabara

Liteko tsa calcium carbonate li ka eketsoa ho rabara ea tlhaho e le setlatsetsi, empa ka lebaka la motsoako o mobe oa setlatsetsi le rabara ea tlhaho, phello ea sebaka se se nang letho e ea hlaha. Ka hona, liteko tsa calcium carbonate li hloka ho ntlafatsoa. ​​Chen Tao le ba bang ba sebelisitse Si-69, sodium stearate le titanate coupling agent ho ntlafatsa liteko tsa calcium carbonate. Liteko li bontšitse hore liteko tsa calcium carbonate tse phekotsoeng li ne li e-na le matla a holimo a holimo le tšebelisano e ntlafalitsoeng ea interfacial le rabara ea tlhaho, e leng se ka bapalang karolo ea bohlokoa ho matlafatseng rabara ea tlhaho.

Likopo tsa thepa ea khohlano

Litelu tsa calcium carbonate li na le khanyetso e ntle ea mocheso 'me li ka sebelisoa linthong tsa khohlano ho ntlafatsa haholo khanyetso ea ho tsofala.

Li Litao o sebelisitse litelu tsa calcium carbonate liphaepheng tsa li-brake tsa likoloi mme a batlisisa litšobotsi tse eketsang le tse fokotsang khohlano ea litelu tsa calcium carbonate le papiso ea litelu tsa asbestos, calcium carbonate e boima le calcium carbonate. Liphetho tsa liteko li bontša hore coefficient ea khohlano, sekhahla sa ho tsofala le litšobotsi tsa mechini liphaepheng tsa li-brake tsa likoloi li ntlafalitsoe ha litelu tsa calcium carbonate li eketsoa ka 15%; ho feta moo, ts'ebetso ea eona ka kakaretso e phahametse tse ling tse peli.

Likopo ho lipente

Indastering ea ho roala, litelu tsa calcium carbonate li sebelisoa haholo ho roala ka metsi. Likoahelong tsa metsi, litelu tsa calcium carbonate li ka sebetsa e le mokokotlo oa roala ka lebaka la sebopeho sa tsona se setle le ho hasana hantle, li fana ka tšebeliso e felletseng ea thepa e ntle ea mechini ea litelu tsa calcium carbonate. Likoahelo tse tletseng litelu tsa calcium carbonate li ntlafalitse khanya, ho hasana ho betere le ho fokotseha ha ho teba. Ha litelu tsa calcium carbonate li sebelisoa ho roala, viscosity ea roala e eketseha haholo, joalo ka thixotropy, matla a tlamo le botsitso ba polokelo. Ho feta moo, ka lebaka la thepa ea litelu tsa calcium carbonate, li ka ajoa ka ho lekana ka litharollo tsa silica le emulsion, ka hona li fokotsa ho se tsoele pele ha roala, e leng se sebetsang haholo.

Likopo tlhahisong ea pampiri

Indastering ea pampiri, tšebeliso ea granular calcium carbonate e le thepa ea ho tlatsa e se e ntlafalitse haholo ts'ebetso le lebelo la khatiso ea pampiri, ha tšebeliso ea litelu tsa calcium carbonate e le thepa ea ho tlatsa e fa ea pele bokhoni ba ho hatisa bo betere le ho feta 'me e ka sebelisoa e le tlatsetso ho hlahisa pampiri e nang le bosoeu bo phahameng le ho ba sephara ho betere. Ka lebaka la sebopeho le thepa ea eona e ikhethang, pampiri e entsoeng ka litelu tsa calcium carbonate e na le bokhoni ba ho hatisa bo betere, matla a phahameng le ho boloka ho betere ho feta pampiri e entsoeng ka calcite. Ka hona, ka lebaka la molemo ona, litelu tsa calcium carbonate li na le bokamoso bo tšepisang haholo indastering ea pampiri, haholo-holo bakeng sa tlhahiso ea pampiri e nang le lits'ebetso le litlhoko tse fapaneng.

Likopo tsa thepa ea bongaka

Ntle le lits'ebetso tsa indasteri, litelu tsa calcium carbonate le tsona li sebelisoa hangata linthong tsa bongaka. Calcium ke karolo ea bohlokoa 'meleng oa motho, hangata ka sebopeho sa calcium phosphate, e leng karolo e ka sehloohong ea masapo. Metsoako ea masapo a maiketsetso e ka lokisoa ka ho tlatsa litelu tsa calcium carbonate le ho ntlafatsa litšobotsi tsa mechini tsa thepa. Metsoako ea masapo a maiketsetso e lokisitsoe ke Xu Duyang et al. ba sebelisa mokhoa o tsoakiloeng oa tharollo. Liphetho tsa liteko li bontša hore thepa ea masapo a maiketsetso ha e bake tšenyo liseleng tsa batho 'me e na le bohlokoa bo boholo ba bongaka. Ho phaella moo, litelu tsa calcium carbonate li nkoa e le sehlahisoa se setala, se seng chefo sa bongaka. Litelu tsa calcium carbonate le tsona li sebelisoa lefapheng la bongaka e le thepa e sebetsang ho etsa mecha ea phatlalatso ea setso. Ho ka thoe litelu tsa calcium carbonate le tsona li ka etsa phapang lefapheng la bongaka.