CN105133031A - Bamboo extraction solution silicon wafer texture-etchant and preparation method therefor - Google Patents

Abstract

The invention discloses a bamboo extraction solution silicon wafer texture-etchant which is characterized by being prepared from the following raw materials in parts by weight: 10-15 parts of fresh bamboo leaves, 3-5 parts of sodium tripolyphosphate, 0.3-0.5 part of sodium carbonate, 1.5-2.5 parts of sodium hydroxide, 0.5-1 part of octadecyl diethoxy glycine betaine, 5-10 parts of a texture-etching adjuster, 0.2-0.4 part of cottonseed oil, 1-2 parts of polyethylene glycol, 0.3-0.5 part of xanthan gum and 100-150 parts of water. The silicon wafer texture-etchant disclosed by the invention not only can improve the texture-etching efficiency and the stability of a texture-etching process and effectively improve the conversion efficiency of a battery sheet, but also can reduce the texture-etching corrosion amount, reduce the wrapping degree of the silicon wafer, and reduce fragments. The silicon wafer texture-etchant is non-toxic and harmless, and safe and environmental-friendly, and the product is stable in quality.

Description

A kind of extract solution of bamboo leaves silicon wafer wool making agent and preparation method thereof

Technical field

The present invention relates to silicon wafer wool making technology, be specifically related to a kind of extract solution of bamboo leaves silicon wafer wool making agent and preparation method thereof.

Background technology

Making herbs into wool is the important procedure in manufacture of solar cells technical process, utilize lower concentration alkalescence corrosive fluid to the anisotropic etch principle of silicon single crystal, " pyramid " structure is formed at silicon chip surface, reduce the reflectivity of silicon chip surface, increase the absorption of light, reduce reflectivity, improve the transformation efficiency of solar cell.At present, conventional leather producing process generally adopts sodium hydroxide or potassium hydroxide, and the mixing solutions adding suitable Virahol and water glass carries out making herbs into wool.The composition volatile quantities such as the Virahol that existing Woolen-making liquid uses are large, and the feature of environmental protection is poor, and work-ing life is short, and chemical cost amount is large, and reaction controllability is low, and making herbs into wool poor repeatability, directly affects quality product.Further, wayward to the corrosion of silicon chip, matte controls unstable, and making herbs into wool etching extent is large, and fragmentation rate is high, causes great waste.In order to solve the problem, need to develop new Woolen-making liquid, improving matte homogeneity, improve making herbs into wool effect, improving the efficiency of conversion of solar battery sheet, reduce costs.

Summary of the invention

The object of this invention is to provide the agent of a kind of extract solution of bamboo leaves silicon wafer wool making.

The present invention is achieved by the following technical solutions:

The agent of a kind of extract solution of bamboo leaves silicon wafer wool making, it is obtained by the raw material of following weight parts:

Fresh leaf of bamboo 10-15, tripoly phosphate sodium STPP 3-5, sodium carbonate 0.3-0.5, sodium hydroxide 1.5-2.5, octadecyl dihydroxy ethyl trimethyl-glycine 0.5-1, making herbs into wool conditioning agent 5-10, Oleum Gossypii semen 0.2-0.4, polyoxyethylene glycol 1-2, xanthan gum 0.3-0.5, water 100-150;

Wherein making herbs into wool conditioning agent is made up of the raw material of following weight part: vinylbenzene 3-5, methyl methacrylate 2-4, polyvinyl alcohol 2-4, W-Gum 1-2, Potassium Persulphate 0.1-0.2, peregal 0.5-1, water 80-100; Polyvinyl alcohol and W-Gum are first added 50-60 DEG C of stirring 1-2h in the water of 1/2-2/3 weight by the preparation method of making herbs into wool conditioning agent, add peregal 1000-1500r/min again and stir 5-10min, add vinylbenzene, methyl methacrylate and Potassium Persulphate mix and be heated to 85-95 DEG C of reaction 0.5-1h, finally add remaining water, cool after stirring, to obtain final product.

A preparation method for extract solution of bamboo leaves silicon wafer wool making agent, comprises the following steps:

(1) take raw material by weight, mix also co-ground even after fully being dried by the fresh leaf of bamboo with tripoly phosphate sodium STPP, then add water 80-90 DEG C of stirring 4-8h of sodium carbonate and 1/2-2/3 amount, cooled and filtered, obtains extract solution of bamboo leaves;

(2) sodium hydroxide is dissolved in the water of surplus, first add octadecyl dihydroxy ethyl trimethyl-glycine, Oleum Gossypii semen 800-1000r/min stirs 5-10min, then add extract solution of bamboo leaves, polyoxyethylene glycol and xanthan gum 80-90 DEG C and stir 0.5-1h, cooled and filtered, finally add all the other raw material stirring even, obtain the agent of energy-conserving and environment-protective silicon wafer wool making.

Advantage of the present invention is:

The present invention introduces making herbs into wool additive, produces adsorption with silicon chip surface, improves nucleation density, increases the anisotropy of reaction, is conducive to improving matte pyramid profile, and formation density is large, the matte of uniform, controllable, improves making herbs into wool efficiency; By adding extract solution of bamboo leaves and acting synergistically with composite generation of all the other raw materials, the corrosion speed of silicon chip in alkali lye can be controlled, improve the stability of leather producing process, the efficiency of conversion of effective raising cell piece, can reduce making herbs into wool etching extent again, reduces silicon warp degree, reduce fragment, nontoxic, safety and environmental protection, constant product quality.

Embodiment

Non-limiting examples of the present invention is as follows:

The agent of a kind of extract solution of bamboo leaves silicon wafer wool making, is prepared from by the component raw material of following weight (kg):

The fresh leaf of bamboo 15, tripoly phosphate sodium STPP 5, sodium carbonate 0.5, sodium hydroxide 2.5, octadecyl dihydroxy ethyl trimethyl-glycine 1, making herbs into wool conditioning agent 10, Oleum Gossypii semen 0.4, polyoxyethylene glycol 2, xanthan gum 0.5, water 150;

Wherein making herbs into wool conditioning agent is made up of the component raw material of following weight (kg): vinylbenzene 3, methyl methacrylate 2, polyvinyl alcohol 2, W-Gum 1, Potassium Persulphate 0.1, peregal 0.5, water 80; Polyvinyl alcohol and W-Gum are first added 60 DEG C of stirring 1h in the water of 1/2 weight by the preparation method of making herbs into wool conditioning agent, add peregal 1000r/min again and stir 5min, add vinylbenzene, methyl methacrylate and Potassium Persulphate mix and be heated to 85 DEG C of reaction 0.5h, finally add remaining water, cool after stirring, to obtain final product.

The preparation method of extract solution of bamboo leaves silicon wafer wool making agent comprises the following steps:

(1) take raw material by weight, mix also co-ground even after fully being dried by the fresh leaf of bamboo with tripoly phosphate sodium STPP, 90 DEG C, the water then adding sodium carbonate and 1/2 amount stirs 4h, and cooled and filtered, obtains extract solution of bamboo leaves;

(2) sodium hydroxide is dissolved in the water of surplus, first add octadecyl dihydroxy ethyl trimethyl-glycine, Oleum Gossypii semen 1000r/min stirs 5min, then add extract solution of bamboo leaves, polyoxyethylene glycol and xanthan gum 90 DEG C and stir 0.5h, cooled and filtered, finally add all the other raw material stirring even, obtain the agent of energy-conserving and environment-protective silicon wafer wool making.

Be immersed in by monocrystalline silicon piece in silicon wafer wool making agent obtained above, making herbs into wool under 85 DEG C of conditions, the making herbs into wool time is 20min, and the silicon chip surface obtained forms the suede structure of size uniform, and pyramidal mean sizes is at 1.5-2.5 μm after testing, and reflectivity is 9.2%.

Claims (2)

1. the agent of extract solution of bamboo leaves silicon wafer wool making, is characterized in that, it is obtained by the raw material of following weight parts:

Fresh leaf of bamboo 10-15, tripoly phosphate sodium STPP 3-5, sodium carbonate 0.3-0.5, sodium hydroxide 1.5-2.5, octadecyl dihydroxy ethyl trimethyl-glycine 0.5-1, making herbs into wool conditioning agent 5-10, Oleum Gossypii semen 0.2-0.4, polyoxyethylene glycol 1-2, xanthan gum 0.3-0.5, water 100-150;

Described making herbs into wool conditioning agent is made up of the raw material of following weight part: vinylbenzene 3-5, methyl methacrylate 2-4, polyvinyl alcohol 2-4, W-Gum 1-2, Potassium Persulphate 0.1-0.2, peregal 0.5-1, water 80-100; Polyvinyl alcohol and W-Gum are first added 50-60 DEG C of stirring 1-2h in the water of 1/2-2/3 weight by the preparation method of making herbs into wool conditioning agent, add peregal 1000-1500r/min again and stir 5-10min, add vinylbenzene, methyl methacrylate and Potassium Persulphate mix and be heated to 85-95 DEG C of reaction 0.5-1h, finally add remaining water, cool after stirring, to obtain final product.

2. the preparation method of a kind of extract solution of bamboo leaves silicon wafer wool making according to claim 1 agent, is characterized in that, comprise the following steps:

(1) take raw material by weight, mix also co-ground even after fully being dried by the fresh leaf of bamboo with tripoly phosphate sodium STPP, then add water 80-90 DEG C of stirring 4-8h of sodium carbonate and 1/2-2/3 amount, cooled and filtered, obtains extract solution of bamboo leaves;

(2) sodium hydroxide is dissolved in the water of surplus, first add octadecyl dihydroxy ethyl trimethyl-glycine, Oleum Gossypii semen 800-1000r/min stirs 5-10min, then add extract solution of bamboo leaves, polyoxyethylene glycol and xanthan gum 80-90 DEG C and stir 0.5-1h, cooled and filtered, finally add all the other raw material stirring even, obtain the agent of energy-conserving and environment-protective silicon wafer wool making.