E pili ana i ka mīkini extrusion

ʻEono mau wahi hoihoi! Loaʻa i nā ʻumiʻumi calcium carbonate ka hiki ke hoʻohiki
Aboutmīkini extrusion:
He mea kamaʻāina ka calcium carbonate, akā he aha nā ʻumiʻumi calcium carbonate?

ʻO nā ʻumiʻumi he mau olonā pōkole kūlohelohe a i ʻole synthetic me kahi ʻano kristal hoʻokahi, he liʻiliʻi loa ke anawaena ma ke ʻano o ka nui (microns), he lakio hiʻohiʻona nui a ua manaʻo nui ʻia he mau mea crystalline hoʻokahi-dimensional.

Ua hoʻomohala ʻia nā haneli o nā ʻumiʻumi, me nā ʻumiʻumi metala he nui e like me ka nickel a me ka hao, nā ʻumiʻumi oxide e like me MgO a me ZnO, nā ʻumiʻumi seramika e like me SiC, nā ʻumiʻumi boride e like me TiB2 a me ZrB2, a me nā ʻumiʻumi inorganic a me organic ʻē aʻe he nui.

ʻO ka whisker calcium carbonate kahi mea kristal hoʻokahi synthetic, ʻo ke ʻano kemika ʻo CaCO3, ʻo ke kaumaha molekala pili he 100.09, nona ka CaO a me CO2 he 56.03%, 43.97%, ʻo kona kiko heheʻe he 759 ℃, ʻo ka density he 2.86g/cm3. ʻO ka whisker calcium carbonate macroscopically maʻamau ka pauka wehe keʻokeʻo, i loko o ka microscope electron scanning he kristal nila-like a fibrous paha, lōʻihi o 20-60μm, pōkole ke anawaena o 0.5-1.0μm, lōʻihi i ke anawaena o 20-30, no ka pae aragonite.

ʻOi aku ka maikaʻi o nā waiwai o nā ʻumiʻumi calcium carbonate ma mua o nā mea ʻē aʻe ma ke ʻano o ke keʻokeʻo, ke kūpaʻa wela a me ke kūpaʻa ʻana i ka ʻaʻahu, no laila he mau manaʻolana maikaʻi ko lākou no ka hoʻohana ʻana ma nā ʻano he nui.

Hoʻohana ʻia i loko o nā plastik

He nui ka lakio o nā ʻumiʻumi kalapona kalapona a he liʻiliʻi ka nui o ke kristal, ʻaneʻane ʻaʻohe dislocations kūloko, nā palena palaoa a me nā kīnā ʻē aʻe i loko o ke kristal maʻamau, kokoke nā waiwai mechanical i ke kristal piha, no laila e hoʻohui ʻia i ka hopena hoʻoikaika plastik i ʻike nui ʻia, hiki ke hoʻomaikaʻi maikaʻi i ka ikaika, elastic modulus a me nā waiwai mechanical ʻē aʻe.

Ua hōʻike ʻia nā hoʻokolohua no ka polyethylene, ʻoi aku ka maikaʻi o nā waiwai mechanical o nā ʻumiʻumi calcium carbonate i hoʻopiha ʻia ma mua o nā talc i hoʻopiha ʻia, fiber aniani a me ka calcium carbonate māmā maʻamau. Loaʻa i nā ʻumiʻumi calcium carbonate kahi hoʻonui ikaika koʻikoʻi ma ka polyethylene a emi iki ka hopena ma ka laumania o ka ʻili o ka huahana i hoʻohālikelike ʻia me ka fiber aniani.

Ke hoʻololi ʻia nā ʻumiʻumi calcium carbonate no nā olonā aniani i loko o ka mea nylon, ʻoi aku ka maikaʻi o ka ʻili o ka huahana hopena a hiki ke hoʻohana ʻia ka composite i ka hana ʻana i nā huahana plastik kikoʻī.

Eia kekahi, ʻaʻole e like me nā mea ʻē aʻe, ʻike nui ʻia ka haku mele ʻana o nā ʻumiʻumi calcium carbonate ma ke ʻano a ua hoʻolaha nui ʻia hoʻi. Hiki i ka calcium carbonate ke hana kemika me nā waikawa ikaika e hana i ke kalapona dioxide a me nā paʻakai inorganic. Inā hanu ke kino i nā liʻiliʻi o ka calcium carbonate, e palaho ʻia e ka hopena kūlohelohe o ke kino a ʻaʻole ia e hōʻeha. No laila, ʻo ka hoʻohana ʻana i nā ʻumiʻumi calcium carbonate ma ke ʻano he mea hoʻoikaika no nā plastics biodegradable ʻaʻole ia e hoʻoulu i ka haumia lua i ke kaiapuni kūlohelohe a hiki ke hōʻemi pono i ka haumia keʻokeʻo a pale i ke kaiapuni.

Nā noi i loko o ka laholio

Hiki ke hoʻohui ʻia nā ʻūmiʻi kalapona calcium i ka laholio kūlohelohe ma ke ʻano he mea hoʻopihapiha, akā ma muli o ka hui maikaʻi ʻole o ka mea hoʻopihapiha a me ka laholio kūlohelohe, hana ʻia kahi hopena hakahaka o ka ʻili. No laila, pono e hoʻomaikaʻi ʻia nā ʻūmiʻi kalapona calcium. Ua hoʻohana ʻo Chen Tao et al. i ka Si-69, sodium stearate a me ka titanate coupling agent e hoʻomaikaʻi i nā ʻūmiʻi kalapona calcium. Ua hōʻike nā hoʻokolohua he kiʻekiʻe ka ikehu o ka ʻili o nā ʻūmiʻi kalapona calcium i mālama ʻia a hoʻonui ʻia ka pilina interfacial me ka laholio kūlohelohe, hiki ke pāʻani i kahi hana koʻikoʻi i ka hoʻoikaika ʻana i ka laholio kūlohelohe.

Nā noi i nā mea friction

He kūpaʻa maikaʻi ko nā ʻumiʻumi calcium carbonate i ka mahana a hiki ke hoʻohana ʻia i nā mea friction e hoʻomaikaʻi nui i ke kūpaʻa ʻana i ka ʻaʻahu.

Ua hoʻohana ʻo Li Litao i nā ʻūmiʻi calcium carbonate i loko o nā uhi paleki kaʻa a ua noiʻi i nā waiwai hoʻonui a hoʻemi i ka friction o nā ʻūmiʻi calcium carbonate a me ka hoʻohālikelike ʻana o ka asbestos, calcium carbonate kaumaha a me nā ʻūmiʻi calcium carbonate. Hōʻike nā hopena hoʻokolohua ua hoʻomaikaʻi ʻia ke koina friction, ka nui o ke komo ʻana a me nā waiwai mechanical i loko o nā uhi paleki kaʻa ke hoʻohui ʻia ka ʻūmiʻi calcium carbonate ma 15%; eia kekahi, ʻoi aku ka maikaʻi o kāna hana holoʻokoʻa ma mua o nā mea ʻelua ʻē aʻe.

Nā noi i nā uhi

I loko o ka ʻoihana uhi, hoʻohana nui ʻia nā ʻūpā calcium carbonate i nā uhi wai. I loko o nā uhi wai, hiki i nā ʻūpā calcium carbonate ke hana ma ke ʻano he iwi kuamoʻo i loko o ka uhi ma muli o ko lākou ʻano maikaʻi a me ka hoʻopuehu maikaʻi, e hāʻawi ana i ka pāʻani piha i nā waiwai mechanical maikaʻi loa o nā ʻūpā calcium carbonate. ʻO nā uhi i hoʻopiha ʻia me nā ʻūpā calcium carbonate ua hoʻomaikaʻi i ka ʻōlinolino, ka hoʻopuehu maikaʻi a me ka hoʻemi ʻana i ka piholo ʻana. Ke hoʻohana ʻia nā ʻūpā calcium carbonate i nā uhi, piʻi nui ka viscosity o ka uhi, e like me ka thixotropy, ka ikaika o ka hoʻopaʻa ʻana a me ke kūpaʻa o ka mālama ʻana. Eia kekahi, ma muli o nā waiwai o nā ʻūpā calcium carbonate, hiki ke hoʻolaha like ʻia i loko o nā silica sols a me nā hopena emulsion, no laila e hōʻemi ana i ka discontinuity o ka uhi, he mea pono loa ia.

Nā noi i ka hana pepa

I loko o ka ʻoihana pepa, ua hoʻomaikaʻi nui ka hoʻohana ʻana i ka calcium carbonate granular ma ke ʻano he mea hoʻopihapiha i ka hana a me ka wikiwiki o ka paʻi ʻana o ka pepa, ʻoiai ʻo ka hoʻohana ʻana i nā whiskers calcium carbonate ma ke ʻano he mea hoʻopihapiha e hāʻawi i ka mea mua me ka hiki ke paʻi maikaʻi a hiki ke hoʻohana ʻia ma ke ʻano he mea hoʻohui e hana i ka pepa me ke keʻokeʻo kiʻekiʻe a me ka pālahalaha maikaʻi. Ma muli o kona ʻano a me nā waiwai kikoʻī, ʻoi aku ka maikaʻi o ka paʻi ʻana o ka pepa i hana ʻia mai nā whiskers calcium carbonate, ʻoi aku ka ikaika a me ka paʻa ʻana ma mua o ka pepa i hana ʻia mai ka calcite. No laila, ma muli o kēia pono, he wā e hiki mai ana nā whiskers calcium carbonate i ka ʻoihana pepa, ʻoi aku hoʻi no ka hana ʻana i ka pepa me nā noi a me nā pono like ʻole.

Nā noi i nā mea lapaʻau

Ma waho aʻe o nā noi ʻoihana, hoʻohana pinepine ʻia nā ʻumiʻumi calcium carbonate i nā mea lapaʻau. He mea nui ka calcium i ke kino o ke kanaka, ma ke ʻano o ka calcium phosphate, ʻo ia ka ʻāpana nui o nā iwi. Hiki ke hoʻomākaukau ʻia nā hui iwi artificial ma ka hoʻopiha ʻana me nā ʻumiʻumi calcium carbonate a me ka hoʻomaikaʻi ʻana i nā waiwai mechanical o ka mea. Ua hoʻomākaukau ʻia nā hui iwi artificial e Xu Duyang et al. me ka hoʻohana ʻana i kahi ʻano hoʻonā hui. Hōʻike nā hopena hoʻokolohua ʻaʻole hōʻino ka mea iwi artificial i nā cell kanaka a he waiwai nui ia no ka lāʻau lapaʻau. Eia kekahi, ua manaʻo ʻia nā ʻumiʻumi calcium carbonate he mea hoʻoulu biomedical ʻōmaʻomaʻo, ʻaʻohe ʻawaʻawa. Hoʻohana ʻia nā ʻumiʻumi calcium carbonate ma ke kahua lapaʻau ma ke ʻano he mea hana e hana ai i nā mea moʻomeheu. Hiki ke ʻōlelo ʻia hiki i nā ʻumiʻumi calcium carbonate ke hana i kahi ʻokoʻa ma ke kahua lapaʻau.