ʻEhia ʻano mānoanoa o ka pena?

ʻO Thickener kahi ʻano rheological additive kūikawā, kāna hana nui e hoʻonui i ka viscosity o ka wai pena, hoʻomaikaʻi i ka hana mālama, hana hana a me ka hopena kiʻiʻoniʻoni pena o ka pena.

ʻO ke kuleana o nā mānoanoa i nā uhi

mānoanoa

Kūʻē i ka hoʻopaʻa ʻana

Paʻa wai

Anti-sagging

Kūʻē i ka emi ʻana

E hoʻomaikaʻi i ka pono hoʻopuehu

E hoʻomaikaʻi i ka hana kūkulu

E hoʻonui i ka mānoanoa kiʻi pena

E hoʻomaikaʻi i ka hopena o ka ʻili

Nā hiʻohiʻona o nā mānoanoa like ʻole

1. Manoanoa anoano

ʻO ka mea maʻamau ka bentonite organik, nona ka mea nui he montmorillonite. Hiki i kāna hana kūikawā lamellar ke hāʻawi i ka uhi me ka pseudoplasticity ikaika, thixotropy, paʻa paʻa a me ka lubricity. ʻO ke kumumanaʻo o ka mānoanoa ʻo ia ka pauka e hoʻomoʻa i ka wai a pehu i ka mānoanoa o ka wai, no laila aia kahi paʻa wai.

ʻO nā hemahema: ʻaʻole i maʻalahi ke kahe a me ka pae ʻana i ka hana, ʻaʻole maʻalahi e hoʻopuehu a hoʻohui.

2. Cellulose etera

ʻO ka mea maʻamau i hoʻohana ʻiahydroxyethyl cellulose(HEC), nona ka mana mānoanoa kiʻekiʻe, ka hoʻokuʻu maikaʻi ʻana, ka hoʻopuehu a me nā waiwai paʻa wai, ka mea nui no ka mānoanoa o ka pae wai.

ʻO nā mea pōʻino: pili i ka pale wai o ka uhi ʻana, lawa ʻole ka hana anti-mold, a me ka hana pae maikaʻi ʻole.

3. ʻAlika

Hoʻokaʻawale ʻia nā mānoanoa Acrylic i ʻelua ʻano: acrylic alkali-swellable thickeners (ASE) a me associative alkali-swellable thickeners (HASE).

ʻO ke kumu mānoanoa o ka waikawa acrylic alkali-swellable mānoanoa (ASE) e hoʻokaʻawale i ka carboxylate ke hoʻololi ʻia ka pH i ka alkaline, no laila e kikoo ʻia ke kaulahao molekala mai kahi helical a hiki i ke koʻokoʻo ma o ka hoʻohuli electrostatic repulsion ma waena o nā ion carboxylate. , hoʻomaikaʻi i ka ʻO ka viscosity o ka pae wai. Loaʻa i kēia ʻano mānoanoa ka hana mānoanoa kiʻekiʻe, pseudoplasticity ikaika a me ka hoʻokuʻu maikaʻi.

Hoʻopuka ka hui ʻana o ka alkali-swellable thickener (HASE) i nā pūʻulu hydrophobic ma ke kumu o nā mānoanoa alkali-swellable mānoanoa (ASE). Pēlā nō, ke hoʻololi ʻia ka pH i ka alkaline, ʻo ka repulsion electrostatic like-sex ma waena o nā ion carboxylate e hoʻonui ʻia ke kaulahao molekala mai ke ʻano helical a hiki i ke ʻano koʻokoʻo, e hoʻonui ai i ka viscosity o ka pae wai; a hiki i nā hui hydrophobic i hoʻokomo ʻia ma ke kaulahao nui ke hui pū me nā ʻāpana latex e hoʻonui i ka viscosity o ka pae emulsion.

ʻO nā hemahema: ʻoluʻolu i ka pH, lawa ʻole ka kahe ʻana a me ka pae ʻana o ke kiʻi pena, maʻalahi e mānoanoa ma hope.

4. Polyurethane

Polyurethane hui mānoanoa (HEUR) he hydrophobically hoʻololi ʻia ethoxylated polyurethane wai-soluble polymer, nona ka non-ionic associative thickener. Aia ʻekolu ʻāpana: base hydrophobic, chain hydrophilic a me base polyurethane. Hoʻonui ka waihona polyurethane i ka hopena pena, a paʻa ke kaulahao hydrophilic i ka pae wai. Hoʻopili ke kumu hydrophobic me nā hale hydrophobic e like me nā ʻāpana latex, surfactants, a me nā puaʻa. , ka hana ʻana i ʻekolu-dimensional network structure, i mea e hoʻokō ai i ke kumu o ka mānoanoa.

Hoʻohālikelike ʻia ia e ka mānoanoa o ka pae emulsion, kahe maikaʻi a me ka hoʻokō ʻana i ka pae, ʻoi aku ka maikaʻi o ka mānoanoa a me ka mālama ʻana i ka viscosity paʻa, ʻaʻohe palena pH; a loaʻa iā ia nā pōmaikaʻi i ka pale ʻana i ka wai, gloss, transparency, etc.

ʻO nā mea pōʻino: i loko o ka ʻōnaehana viscosity a me ka haʻahaʻa haʻahaʻa, ʻaʻole maikaʻi ka hopena anti-settling ma ka pauka, a ua maʻalahi ka hopena mānoanoa e nā dispersants a me nā solvents.